Airworthiness Directives; Eurocopter Deutschland GmbH Helicopters, 75073-75075 [2012-30588]

Download as PDF Federal Register / Vol. 77, No. 244 / Wednesday, December 19, 2012 / Proposed Rules wreier-aviles on DSK5TPTVN1PROD with Dissipation is rapid dilution of the smoke by ventilation air. Mobility is rapid movement of the smoke into and out of the occupied area. In no case should a light haze indicative of stagnant airflow form, as this indicates that the ventilation system is failing to meet the requirements of 14 CFR 25.831, iii. The smoke from a source below the main deck must not rise above armrest height on the main deck, and iv. The smoke from a source in the main deck must dissipate rapidly via dilution with fresh air and be evacuated from the airplane. The Airplane Flight Manual (AFM) must include procedures to evacuate smoke from the occupied areas. To demonstrate that the quantity of smoke is small, a flight test must be conducted which simulates the emergency procedures used in the event of a fire during flight, including the use of VMO/MMO descent profiles and a simulated landing, if such conditions are specified in the emergency procedure. 2. Requirement for smoke or fire detection in electrical/electronic equipment bays: A smoke or fire detection system compliant with §§ 25.855(a), (b), (c), and (d); and § 25.858 must be provided for each electrical/electronic equipment bay in the pressurized cabin. Each system must provide a visual indication to the flight deck within one minute after the start of a fire. Airplane flight tests must be conducted to show compliance with these requirements, and the performance of the detectors must be shown in accordance with Advisory Circular 25–9A, Smoke Detection, Penetration, and Evacuation Tests and Related Flight Manual Emergency Procedures, or other means acceptable to the FAA. 3. Requirement for AFM procedures safety analysis: It shall be demonstrated that the AFM procedures to shut down electrical/electronic equipment bays, or part of them, in case of smoke/fire detection, do not compromise the safe operation of the aircraft. If a procedure requests to shut down only part of the equipment, the remaining equipment shall be incorporated with safety precautions against fire propagation. Issued in Renton, Washington, on December 13, 2012. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2012–30493 Filed 12–18–12; 8:45 am] BILLING CODE 4910–13–P VerDate Mar<15>2010 15:12 Dec 18, 2012 Jkt 229001 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2011–1285; Directorate Identifier 2010–SW–073–AD] RIN 2120–AA64 Airworthiness Directives; Eurocopter Deutschland GmbH Helicopters Federal Aviation Administration (FAA), DOT. ACTION: Supplemental notice of proposed rulemaking (SNPRM); reopening of comment period. AGENCY: We are revising an earlier proposed airworthiness directive (AD) for Eurocopter Deutschland GmbH (Eurocopter) Model BO–105A, BO– 105C, BO–105LS A–1, BO–105LS A–3, and BO–105S helicopters, which proposed inspecting for debonding of the erosion protective shell (abrasion strip) on the leading edge of each main rotor blade. This SNPRM proposes to revise those inspection requirements by identifying specific dates of replacement of the applicable parts and identifying a specific inspection method for debonding of an abrasion strip. DATES: We must receive comments on this proposed AD by February 4, 2013. ADDRESSES: You may send comments by any of the following methods: • Federal eRulemaking Docket: Go to http://www.regulations.gov. Follow the online instructions for sending your comments electronically. • Fax: 202–493–2251. • Mail: Send comments to the U.S. Department of Transportation, Docket Operations, M–30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE., Washington, DC 20590–0001. • Hand Delivery: Deliver to the ‘‘Mail’’ address between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. SUMMARY: 75073 For service information identified in this proposed AD, contact American Eurocopter Corporation, 2701 N. Forum Drive, Grand Prairie, Texas 75052; telephone (972) 641–0000 or (800) 232– 0323; fax (972) 641–3775; or at http:// www.eurocopter.com/techpub. You may review the referenced service information at the FAA, Office of the Regional Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, Fort Worth, Texas 76137. FOR FURTHER INFORMATION CONTACT: Jim Grigg, Manager, Safety Management Group, Rotorcraft Directorate, FAA, 2601 Meacham Blvd., Fort Worth, Texas 76137; telephone (817) 222–5110; email jim.grigg@faa.gov. SUPPLEMENTARY INFORMATION: Comments Invited We invite you to participate in this rulemaking by submitting written comments, data, or views. We also invite comments relating to the economic, environmental, energy, or federalism impacts that might result from adopting the proposals in this document. The most helpful comments reference a specific portion of the proposal, explain the reason for any recommended change, and include supporting data. To ensure the docket does not contain duplicate comments, commenters should send only one copy of written comments, or if comments are filed electronically, commenters should submit only one time. We will file in the docket all comments that we receive, as well as a report summarizing each substantive public contact with FAA personnel concerning this proposed rulemaking. Before acting on this proposal, we will consider all comments we receive on or before the closing date for comments. We will consider comments filed after the comment period has closed if it is possible to do so without incurring expense or delay. We may change this proposal in light of the comments we receive. Examining the AD Docket Discussion You may examine the AD docket on the Internet at http:// www.regulations.gov or in person at the Docket Operations Office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this proposed AD, the economic evaluation, any comments received, and other information. The street address for the Docket Operations Office (telephone 800–647–5527) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. On November 29, 2011, we issued a proposal to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) to include an AD that would apply to Eurocopter Model BO–105A, BO–105C, BO–105LS A–1, BO–105LS A–3, and BO–105S helicopters with a main rotor blade, part number (P/N) 105–15103, 105–15141, 105–15141V001, 105– 15143, 105–15150, 105–15150V001, 105–15152, 105–81013, 105–87214, 1120–15101, or 1120–15103; where the main rotor blade erosion protective shell was replaced between September 2006 PO 00000 Frm 00009 Fmt 4702 Sfmt 4702 E:\FR\FM\19DEP1.SGM 19DEP1 75074 Federal Register / Vol. 77, No. 244 / Wednesday, December 19, 2012 / Proposed Rules wreier-aviles on DSK5TPTVN1PROD with and March 2010. This proposal was published in the Federal Register as a notice of proposed rulemaking (NPRM) on December 6, 2011 (76 FR 76068). The NPRM proposed to require a one-time inspection of each main rotor blade for debonding of the erosion protective shell within 50 hours time-in-service (TIS). If debonding was detected during the inspection, the NPRM proposed replacing the main rotor blade with an airworthy main rotor blade before further flight. The proposed requirements were intended to detect debonding of the main rotor blade erosion protective shell, which could lead to an unbalanced main rotor, high vibration, damage to the tail boom or tail rotor, and loss of control of the helicopter. The European Aviation Safety Agency (EASA), which is the Technical Agent for the Member States of the European Union, has issued EASA Emergency AD No. 2010–0216–E, dated October 21, 2010 (corrected October 29, 2010), applicable to Eurocopter Model BO105 A, BO105 C, BO105 D, BO105 LS A–1, BO105 LS A–3, and BO105 S helicopters, all variants (except variants CB–5 and DBS–5). EASA advises that during an inspection on a BO105 helicopter, debonding was found on the erosion protective shell of a main rotor blade, and investigation showed the debonding was caused by incorrect installation of the erosion protective shell. In addition, EASA states that an incident occurred where a second BO105 helicopter lost its erosion protective shell during hover flight. EASA advises that this condition, if not corrected, could result in loss of the main rotor blade erosion protective shell during flight, leading to an unbalanced main rotor and high vibrations, which could damage the tail boom or tail rotor or result in loss of tail rotor control and loss of control of the helicopter. Actions Since Previous NPRM Was Issued Since we issued the previous NPRM (76 FR 76068, December 6, 2011), we discovered the need for identifying specific dates of replacement of the applicable parts and identifying that a tap inspection would be the required method for inspecting for debonding of an abrasion strip. The previous NPRM stated the proposed AD would apply to certain part-numbered main rotor blades with a main rotor blade abrasion strip that was replaced between September 2006 and March 2010. This supplemental NPRM proposes clarifying the date range to be inclusive of September 1, 2006 through March 31, 2010. The previous NPRM also VerDate Mar<15>2010 15:12 Dec 18, 2012 Jkt 229001 proposed to require inspecting for debonding of the abrasion strip along the leading edge of each main rotor blade. This supplemental NPRM clarifies that the proposed inspection method is a tap inspection. Because these proposed changes expand the applicability and may increase the economic burden on some operators, the FAA will reopen the comment period to provide additional opportunity for public comment. FAA’s Determination We are proposing this AD because we evaluated all known relevant information and determined that an unsafe condition is likely to exist or develop on other helicopters of these same type designs. Certain changes described above expand the scope of the original NPRM (76 FR 76068, December 6, 2011). As a result, we have determined that it is necessary to reopen the comment period to provide additional opportunity for the public to comment. Related Service Information Eurocopter has issued Emergency Alert Service Bulletin (ASB) No. ASB BO105–10–124, dated July 14, 2010, for the Model BO105 helicopter, with a main rotor blade, P/N 105–15103, 105– 15141, 105–15141V001, 105–15143, 105–15150, 105–15150V001, 105– 15152, 105–81013, 105–87214, 1120– 15101, or 1120–15103, where the main rotor blade erosion protective shell was replaced between September 2006 and March 2010. Eurocopter also issued Emergency ASB No. ASB–BO105LS– 10–12, dated July 14, 2010, for the Model BO105LS A–3 helicopter, with a main rotor blade, P/N 105–15141, where the main rotor blade erosion protective shell was replaced between September 2006 and March 2010. Both Emergency ASBs exclude helicopters from this inspection if each main rotor blade was inspected at the last 600 flight hour inspection and no debonding was detected during the inspection. Both Emergency ASBs specified a one-time inspection of the main rotor blades within the next 50 flight hours to determine if debonding of the main rotor blade erosion protective shell has occurred. Eurocopter subsequently issued Emergency ASB No. ASB BO105–10– 124, Revision 1, dated October 18, 2010, and Emergency ASB No. ASB– BO105LS–10–12, Revision 1, dated October 20, 2010. These service bulletins specify the same inspection requirements as the original service bulletins, but revise the inspection compliance time from 50 flight hours to PO 00000 Frm 00010 Fmt 4702 Sfmt 4702 10 flight hours. EASA classified these service bulletins as mandatory and issued EASA Emergency AD No. 2010– 0216–E, dated October 21, 2010 (corrected October 29, 2010) to ensure the continued airworthiness of these helicopters. Proposed Requirements of the Supplemental NPRM This proposed AD would require, within 50 hours TIS, inspecting for debonding by tap testing the abrasion strip of the leading edge of each main rotor blade. If there is debonding in any area of the abrasion strip, this proposed AD would require, before further flight, replacing the main rotor blade. Differences Between This Supplemental NPRM and the EASA AD The differences between this proposed AD and the EASA AD are: • The EASA AD allows compliance within ‘‘10 flight hours, or 4 flight cycles, or 4 weeks, whichever occurs first,’’ and this proposed AD would require compliance within 50 hours TIS. • The EASA AD allows you to replace the main rotor blade erosion protective shell if debonding is detected, and this proposed AD would require you to replace the main rotor blade with an airworthy main rotor blade if debonding is detected. • The EASA AD is applicable to the Model BO105 D helicopter; however, this proposed AD would not include this model because it does not have a type certificate in the U.S. Costs of Compliance We estimate that this AD would affect 97 helicopters of U.S. Registry. We estimate that operators may incur the following costs in order to comply with this proposed AD. It would take about 1.0 work-hour per helicopter to perform the inspection at an average labor rate of $85 per work-hour. Based on these figures, we estimate the cost of the inspection on U.S. operators would be $8,245 or $85 per helicopter. If there is debonding, we estimate that it would take about 2 work-hours to replace a main rotor blade and required parts would cost $114,182, for a total cost of $114,352 per blade. We have no way of determining how many operators will incur replacement costs. Authority for This Rulemaking Title 49 of the United States Code specifies the FAA’s authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. ‘‘Subtitle VII: Aviation Programs,’’ describes in more E:\FR\FM\19DEP1.SGM 19DEP1 Federal Register / Vol. 77, No. 244 / Wednesday, December 19, 2012 / Proposed Rules detail the scope of the Agency’s authority. We are issuing this rulemaking under the authority described in ‘‘Subtitle VII, Part A, Subpart III, Section 44701: General requirements.’’ Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. Regulatory Findings We determined that this proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would not have a substantial direct effect on the States, on the relationship between the national Government and the States, or on the distribution of power and responsibilities among the various levels of government. For the reasons discussed, I certify this proposed regulation: 1. Is not a ‘‘significant regulatory action’’ under Executive Order 12866; 2. Is not a ‘‘significant rule’’ under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); 3. Will not affect intrastate aviation in Alaska to the extent that it justifies making a regulatory distinction; and 4. Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. We prepared an economic evaluation of the estimated costs to comply with this proposed AD and placed it in the AD docket. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. The Proposed Amendment wreier-aviles on DSK5TPTVN1PROD with Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows: PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. VerDate Mar<15>2010 15:12 Dec 18, 2012 Jkt 229001 § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive (AD): Eurocopter Deutschland GmbH: Docket No. FAA–2011–1285; Directorate Identifier 2010–SW–073–AD. (a) Applicability This AD applies to Model BO–105A, BO– 105C, BO–105LS A–1, BO–105LS A–3, and BO–105S helicopters, with a main rotor blade, part number 105–15103, 105–15141, 105–15141V001, 105–15143, 105–15150, 105–15150V001, 105–15152, 105–81013, 105–87214, 1120–15101, or 1120–15103; where the main rotor blade erosion protective shell (abrasion strip) was replaced between September 1, 2006 and March 31, 2010, inclusive; certificated in any category. 75075 0000 or (800) 232–0323; fax (972) 641–3775; or at http://www.eurocopter.com/techpub. You may review a copy of the service information at the FAA, Office of the Regional Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, Fort Worth, Texas 76137. (2) The subject of this AD is addressed in European Aviation Safety Agency Emergency AD No. 2010–0216–E, dated October 21, 2010 (corrected October 29, 2010). (g) Subject Joint Aircraft Service Component (JASC) Code: 6210, Main Rotor Blades. Issued in Fort Worth, Texas, on December 12, 2012. S. Frances Cox, Acting Directorate Manager, Rotorcraft Directorate, Aircraft Certification Service. (b) Unsafe Condition This AD defines the unsafe condition as debonding of a main rotor blade erosion protective shell (abrasion strip). This condition could result in loss of the abrasion strip and an unbalanced main rotor, high vibration, damage to the tail boom or tail rotor, and loss of control of the helicopter. [FR Doc. 2012–30588 Filed 12–18–12; 8:45 am] (c) Compliance You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time. 21 CFR Part 1308 (d) Required Actions (1) Within 50 hours time-in-service, inspect the main rotor blade for debonding of the erosion protective shell by tap testing the abrasion strip of the leading edge of each main rotor blade. (2) If the abrasion strip is debonding in any area, before further flight, replace the main rotor blade. (e) Alternative Methods of Compliance (AMOCs) (1) The Manager, Safety Management Group, FAA, may approve AMOCs for this AD. Send your proposal to: Jim Grigg, Manager, Safety Management Group, Rotorcraft Directorate, FAA, 2601 Meacham Blvd., Fort Worth, Texas 76137; telephone (817) 222–5110; email jim.grigg@faa.gov. (2) For operations conducted under a 14 CFR part 119 operating certificate or under 14 CFR part 91, subpart K, we suggest that you notify your principal inspector, or lacking a principal inspector, the manager of the local flight standards district office or certificate holding district office before operating any aircraft complying with this AD through an AMOC. (f) Additional Information (1) Eurocopter Emergency Alert Service Bulletin No. ASB BO105–10–124, Revision 1, dated October 18, 2010, and No. ASB– BO105LS–10–12, Revision 1, dated October 20, 2010, which are not incorporated by reference, contain additional information about the subject of this AD. For this service information, contact American Eurocopter Corporation, 2701 N. Forum Drive, Grand Prairie, Texas 75052; telephone (972) 641– PO 00000 Frm 00011 Fmt 4702 Sfmt 4702 BILLING CODE 4910–13–P DEPARTMENT OF JUSTICE Drug Enforcement Administration [Docket No. DEA–369] Schedules of Controlled Substances: Placement of Lorcaserin Into Schedule IV Drug Enforcement Administration, Department of Justice. ACTION: Notice of proposed rulemaking. AGENCY: The Drug Enforcement Administration (DEA) proposes placing the substance lorcaserin, including its salts, isomers, and salts of isomers whenever the existence of such salts, isomers, and salts of isomers is possible, into Schedule IV of the Controlled Substances Act (CSA). This proposed action is based on a recommendation from the Assistant Secretary for Health of the Department of Health and Human Services (HHS) and on an evaluation of all other relevant data by DEA. If finalized, this action would impose the regulatory controls and criminal sanctions of Schedule IV on the manufacture, distribution, dispensing, importation, exportation, and possession of lorcaserin and products containing lorcaserin. DATES: DEA will permit interested persons to file written comments on this proposal pursuant to 21 CFR 1308.43(g). Electronic comments must be submitted and written comments must be postmarked on or before January 18, 2013. Commenters should be aware that the electronic Federal Docket Management System will not accept comments after midnight Eastern Time on the last day of the comment period. SUMMARY: E:\FR\FM\19DEP1.SGM 19DEP1

Agencies

[Federal Register Volume 77, Number 244 (Wednesday, December 19, 2012)]
[Proposed Rules]
[Pages 75073-75075]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2012-30588]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2011-1285; Directorate Identifier 2010-SW-073-AD]
RIN 2120-AA64


Airworthiness Directives; Eurocopter Deutschland GmbH Helicopters

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Supplemental notice of proposed rulemaking (SNPRM); reopening 
of comment period.

-----------------------------------------------------------------------

SUMMARY: We are revising an earlier proposed airworthiness directive 
(AD) for Eurocopter Deutschland GmbH (Eurocopter) Model BO-105A, BO-
105C, BO-105LS A-1, BO-105LS A-3, and BO-105S helicopters, which 
proposed inspecting for debonding of the erosion protective shell 
(abrasion strip) on the leading edge of each main rotor blade. This 
SNPRM proposes to revise those inspection requirements by identifying 
specific dates of replacement of the applicable parts and identifying a 
specific inspection method for debonding of an abrasion strip.

DATES: We must receive comments on this proposed AD by February 4, 
2013.

ADDRESSES: You may send comments by any of the following methods:
     Federal eRulemaking Docket: Go to http://www.regulations.gov. Follow the online instructions for sending your 
comments electronically.
     Fax: 202-493-2251.
     Mail: Send comments to the U.S. Department of 
Transportation, Docket Operations, M-30, West Building Ground Floor, 
Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590-0001.
     Hand Delivery: Deliver to the ``Mail'' address between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov or in person at the Docket Operations Office 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The AD docket contains this proposed AD, the economic 
evaluation, any comments received, and other information. The street 
address for the Docket Operations Office (telephone 800-647-5527) is in 
the ADDRESSES section. Comments will be available in the AD docket 
shortly after receipt.
    For service information identified in this proposed AD, contact 
American Eurocopter Corporation, 2701 N. Forum Drive, Grand Prairie, 
Texas 75052; telephone (972) 641-0000 or (800) 232-0323; fax (972) 641-
3775; or at http://www.eurocopter.com/techpub. You may review the 
referenced service information at the FAA, Office of the Regional 
Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, Fort Worth, 
Texas 76137.

FOR FURTHER INFORMATION CONTACT: Jim Grigg, Manager, Safety Management 
Group, Rotorcraft Directorate, FAA, 2601 Meacham Blvd., Fort Worth, 
Texas 76137; telephone (817) 222-5110; email jim.grigg@faa.gov.

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite you to participate in this rulemaking by submitting 
written comments, data, or views. We also invite comments relating to 
the economic, environmental, energy, or federalism impacts that might 
result from adopting the proposals in this document. The most helpful 
comments reference a specific portion of the proposal, explain the 
reason for any recommended change, and include supporting data. To 
ensure the docket does not contain duplicate comments, commenters 
should send only one copy of written comments, or if comments are filed 
electronically, commenters should submit only one time.
    We will file in the docket all comments that we receive, as well as 
a report summarizing each substantive public contact with FAA personnel 
concerning this proposed rulemaking. Before acting on this proposal, we 
will consider all comments we receive on or before the closing date for 
comments. We will consider comments filed after the comment period has 
closed if it is possible to do so without incurring expense or delay. 
We may change this proposal in light of the comments we receive.

Discussion

    On November 29, 2011, we issued a proposal to amend part 39 of the 
Federal Aviation Regulations (14 CFR part 39) to include an AD that 
would apply to Eurocopter Model BO-105A, BO-105C, BO-105LS A-1, BO-
105LS A-3, and BO-105S helicopters with a main rotor blade, part number 
(P/N) 105-15103, 105-15141, 105-15141V001, 105-15143, 105-15150, 105-
15150V001, 105-15152, 105-81013, 105-87214, 1120-15101, or 1120-15103; 
where the main rotor blade erosion protective shell was replaced 
between September 2006

[[Page 75074]]

and March 2010. This proposal was published in the Federal Register as 
a notice of proposed rulemaking (NPRM) on December 6, 2011 (76 FR 
76068). The NPRM proposed to require a one-time inspection of each main 
rotor blade for debonding of the erosion protective shell within 50 
hours time-in-service (TIS). If debonding was detected during the 
inspection, the NPRM proposed replacing the main rotor blade with an 
airworthy main rotor blade before further flight. The proposed 
requirements were intended to detect debonding of the main rotor blade 
erosion protective shell, which could lead to an unbalanced main rotor, 
high vibration, damage to the tail boom or tail rotor, and loss of 
control of the helicopter.
    The European Aviation Safety Agency (EASA), which is the Technical 
Agent for the Member States of the European Union, has issued EASA 
Emergency AD No. 2010-0216-E, dated October 21, 2010 (corrected October 
29, 2010), applicable to Eurocopter Model BO105 A, BO105 C, BO105 D, 
BO105 LS A-1, BO105 LS A-3, and BO105 S helicopters, all variants 
(except variants CB-5 and DBS-5). EASA advises that during an 
inspection on a BO105 helicopter, debonding was found on the erosion 
protective shell of a main rotor blade, and investigation showed the 
debonding was caused by incorrect installation of the erosion 
protective shell. In addition, EASA states that an incident occurred 
where a second BO105 helicopter lost its erosion protective shell 
during hover flight. EASA advises that this condition, if not 
corrected, could result in loss of the main rotor blade erosion 
protective shell during flight, leading to an unbalanced main rotor and 
high vibrations, which could damage the tail boom or tail rotor or 
result in loss of tail rotor control and loss of control of the 
helicopter.

Actions Since Previous NPRM Was Issued

    Since we issued the previous NPRM (76 FR 76068, December 6, 2011), 
we discovered the need for identifying specific dates of replacement of 
the applicable parts and identifying that a tap inspection would be the 
required method for inspecting for debonding of an abrasion strip. The 
previous NPRM stated the proposed AD would apply to certain part-
numbered main rotor blades with a main rotor blade abrasion strip that 
was replaced between September 2006 and March 2010. This supplemental 
NPRM proposes clarifying the date range to be inclusive of September 1, 
2006 through March 31, 2010. The previous NPRM also proposed to require 
inspecting for debonding of the abrasion strip along the leading edge 
of each main rotor blade. This supplemental NPRM clarifies that the 
proposed inspection method is a tap inspection.
    Because these proposed changes expand the applicability and may 
increase the economic burden on some operators, the FAA will reopen the 
comment period to provide additional opportunity for public comment.

FAA's Determination

    We are proposing this AD because we evaluated all known relevant 
information and determined that an unsafe condition is likely to exist 
or develop on other helicopters of these same type designs. Certain 
changes described above expand the scope of the original NPRM (76 FR 
76068, December 6, 2011). As a result, we have determined that it is 
necessary to reopen the comment period to provide additional 
opportunity for the public to comment.

Related Service Information

    Eurocopter has issued Emergency Alert Service Bulletin (ASB) No. 
ASB BO105-10-124, dated July 14, 2010, for the Model BO105 helicopter, 
with a main rotor blade, P/N 105-15103, 105-15141, 105-15141V001, 105-
15143, 105-15150, 105-15150V001, 105-15152, 105-81013, 105-87214, 1120-
15101, or 1120-15103, where the main rotor blade erosion protective 
shell was replaced between September 2006 and March 2010. Eurocopter 
also issued Emergency ASB No. ASB-BO105LS-10-12, dated July 14, 2010, 
for the Model BO105LS A-3 helicopter, with a main rotor blade, P/N 105-
15141, where the main rotor blade erosion protective shell was replaced 
between September 2006 and March 2010. Both Emergency ASBs exclude 
helicopters from this inspection if each main rotor blade was inspected 
at the last 600 flight hour inspection and no debonding was detected 
during the inspection. Both Emergency ASBs specified a one-time 
inspection of the main rotor blades within the next 50 flight hours to 
determine if debonding of the main rotor blade erosion protective shell 
has occurred.
    Eurocopter subsequently issued Emergency ASB No. ASB BO105-10-124, 
Revision 1, dated October 18, 2010, and Emergency ASB No. ASB-BO105LS-
10-12, Revision 1, dated October 20, 2010. These service bulletins 
specify the same inspection requirements as the original service 
bulletins, but revise the inspection compliance time from 50 flight 
hours to 10 flight hours. EASA classified these service bulletins as 
mandatory and issued EASA Emergency AD No. 2010-0216-E, dated October 
21, 2010 (corrected October 29, 2010) to ensure the continued 
airworthiness of these helicopters.

Proposed Requirements of the Supplemental NPRM

    This proposed AD would require, within 50 hours TIS, inspecting for 
debonding by tap testing the abrasion strip of the leading edge of each 
main rotor blade. If there is debonding in any area of the abrasion 
strip, this proposed AD would require, before further flight, replacing 
the main rotor blade.

Differences Between This Supplemental NPRM and the EASA AD

    The differences between this proposed AD and the EASA AD are:
     The EASA AD allows compliance within ``10 flight hours, or 
4 flight cycles, or 4 weeks, whichever occurs first,'' and this 
proposed AD would require compliance within 50 hours TIS.
     The EASA AD allows you to replace the main rotor blade 
erosion protective shell if debonding is detected, and this proposed AD 
would require you to replace the main rotor blade with an airworthy 
main rotor blade if debonding is detected.
     The EASA AD is applicable to the Model BO105 D helicopter; 
however, this proposed AD would not include this model because it does 
not have a type certificate in the U.S.

Costs of Compliance

    We estimate that this AD would affect 97 helicopters of U.S. 
Registry. We estimate that operators may incur the following costs in 
order to comply with this proposed AD. It would take about 1.0 work-
hour per helicopter to perform the inspection at an average labor rate 
of $85 per work-hour. Based on these figures, we estimate the cost of 
the inspection on U.S. operators would be $8,245 or $85 per helicopter. 
If there is debonding, we estimate that it would take about 2 work-
hours to replace a main rotor blade and required parts would cost 
$114,182, for a total cost of $114,352 per blade. We have no way of 
determining how many operators will incur replacement costs.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, section 106, describes the 
authority of the FAA Administrator. ``Subtitle VII: Aviation 
Programs,'' describes in more

[[Page 75075]]

detail the scope of the Agency's authority.
    We are issuing this rulemaking under the authority described in 
``Subtitle VII, Part A, Subpart III, Section 44701: General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.

Regulatory Findings

    We determined that this proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would not 
have a substantial direct effect on the States, on the relationship 
between the national Government and the States, or on the distribution 
of power and responsibilities among the various levels of government.
    For the reasons discussed, I certify this proposed regulation:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866;
    2. Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979);
    3. Will not affect intrastate aviation in Alaska to the extent that 
it justifies making a regulatory distinction; and
    4. Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.
    We prepared an economic evaluation of the estimated costs to comply 
with this proposed AD and placed it in the AD docket.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

The Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

    1. The authority citation for part 39 continues to read as follows:

    Authority:  49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

    2. The FAA amends Sec.  39.13 by adding the following new 
airworthiness directive (AD):

Eurocopter Deutschland GmbH: Docket No. FAA-2011-1285; Directorate 
Identifier 2010-SW-073-AD.

(a) Applicability

    This AD applies to Model BO-105A, BO-105C, BO-105LS A-1, BO-
105LS A-3, and BO-105S helicopters, with a main rotor blade, part 
number 105-15103, 105-15141, 105-15141V001, 105-15143, 105-15150, 
105-15150V001, 105-15152, 105-81013, 105-87214, 1120-15101, or 1120-
15103; where the main rotor blade erosion protective shell (abrasion 
strip) was replaced between September 1, 2006 and March 31, 2010, 
inclusive; certificated in any category.

(b) Unsafe Condition

    This AD defines the unsafe condition as debonding of a main 
rotor blade erosion protective shell (abrasion strip). This 
condition could result in loss of the abrasion strip and an 
unbalanced main rotor, high vibration, damage to the tail boom or 
tail rotor, and loss of control of the helicopter.

(c) Compliance

    You are responsible for performing each action required by this 
AD within the specified compliance time unless it has already been 
accomplished prior to that time.

(d) Required Actions

    (1) Within 50 hours time-in-service, inspect the main rotor 
blade for debonding of the erosion protective shell by tap testing 
the abrasion strip of the leading edge of each main rotor blade.
    (2) If the abrasion strip is debonding in any area, before 
further flight, replace the main rotor blade.

(e) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, Safety Management Group, FAA, may approve AMOCs 
for this AD. Send your proposal to: Jim Grigg, Manager, Safety 
Management Group, Rotorcraft Directorate, FAA, 2601 Meacham Blvd., 
Fort Worth, Texas 76137; telephone (817) 222-5110; email 
jim.grigg@faa.gov.
    (2) For operations conducted under a 14 CFR part 119 operating 
certificate or under 14 CFR part 91, subpart K, we suggest that you 
notify your principal inspector, or lacking a principal inspector, 
the manager of the local flight standards district office or 
certificate holding district office before operating any aircraft 
complying with this AD through an AMOC.

(f) Additional Information

    (1) Eurocopter Emergency Alert Service Bulletin No. ASB BO105-
10-124, Revision 1, dated October 18, 2010, and No. ASB-BO105LS-10-
12, Revision 1, dated October 20, 2010, which are not incorporated 
by reference, contain additional information about the subject of 
this AD. For this service information, contact American Eurocopter 
Corporation, 2701 N. Forum Drive, Grand Prairie, Texas 75052; 
telephone (972) 641-0000 or (800) 232-0323; fax (972) 641-3775; or 
at http://www.eurocopter.com/techpub. You may review a copy of the 
service information at the FAA, Office of the Regional Counsel, 
Southwest Region, 2601 Meacham Blvd., Room 663, Fort Worth, Texas 
76137.
    (2) The subject of this AD is addressed in European Aviation 
Safety Agency Emergency AD No. 2010-0216-E, dated October 21, 2010 
(corrected October 29, 2010).

 (g) Subject

    Joint Aircraft Service Component (JASC) Code: 6210, Main Rotor 
Blades.

    Issued in Fort Worth, Texas, on December 12, 2012.
S. Frances Cox,
Acting Directorate Manager, Rotorcraft Directorate, Aircraft 
Certification Service.
[FR Doc. 2012-30588 Filed 12-18-12; 8:45 am]
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