Airworthiness Directives; Bombardier, Inc. Airplanes, 16919-16921 [2012-6530]

Download as PDF Federal Register / Vol. 77, No. 57 / Friday, March 23, 2012 / Rules and Regulations products identified in this rulemaking action. Regulatory Findings We determined that this AD will not have federalism implications under Executive Order 13132. This AD will 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 above, I certify this AD: 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); and 3. 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 a regulatory evaluation of the estimated costs to comply with this 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. Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 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. § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive (AD): ■ 2012–06–17 Rolls-Royce Deutschland Ltd & Co KG (Formerly Rolls-Royce plc, Derby, England): Amendment 39–16998; Docket No. FAA–2012–0288; Directorate Identifier 2012–NE–10–AD. (a) Effective Date This AD becomes effective March 23, 2012. srobinson on DSK4SPTVN1PROD with RULES (b) Affected ADs None. (c) Applicability This AD applies to the following RollsRoyce Deutschland Ltd & Co KG (RRD) turbofan engines: (1) TAY 611–8 engines, serial numbers (S/Ns) 16870, 16879, 16880, 16897, 18046, 18051, 18052, 18053, 18058, 18065, 18066, 18169, and 18194. VerDate Mar<15>2010 16:27 Mar 22, 2012 Jkt 226001 (2) TAY 611–8C engine S/N 85313. (d) Reason This AD was prompted by the discovery that certain high-pressure (HP) turbine spanner retaining nuts were improperly heat treated after application of silver plating. We are issuing this AD to prevent failure of the HP turbine stage 2 disc, uncontained engine failure, and damage to the airplane. (e) Actions and Compliance Unless already done, do the following actions. (1) Within 20 flight cycles after the effective date of the AD or within 200 flight cycles since the last engine shop visit, whichever occurs first, remove the HP turbine spanner retaining nut from the combustion and HP turbine module, and install a new HP turbine spanner retaining nut. (2) Do not reinstall HP turbine spanner retaining nuts removed as specified in paragraph (e)(1) of this AD, into any engine. (f) Alternative Methods of Compliance (AMOCs) The Manager, Engine Certification Office, may approve AMOCs for this AD. Use the procedures found in 14 CFR 39.19 to make your request. (g) Related Information (1) For more information about this AD, contact Mark Riley, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; email: mark.riley@faa.gov; phone: 781–238– 7758; fax: 781–238–7199. (2) Refer to MCAI European Aviation Safety Agency Emergency AD 2012–0039–E, dated March 9, 2012; AD 2012–0039R1, dated March 14, 2012; and RRD Alert Service Bulletin No. TAY–72–A1769, dated March 9, 2012, for related information. (3) For service information identified in this AD, contact Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, Dahlewitz, 15827 Blankenfelde-Mahlow, Germany; phone: 49 0 33–7086–1883; fax: 49 0 33–7086–3276. You may review copies of the referenced service information at the FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA. For information on the availability of this material at the FAA, call 781–238–7125. Issued in Burlington, Massachusetts, on March 19, 2012. Peter A. White, Manager, Engine & Propeller Directorate, Aircraft Certification Service. [FR Doc. 2012–6995 Filed 3–22–12; 8:45 am] BILLING CODE 4910–13–P PO 00000 Frm 00013 Fmt 4700 Sfmt 4700 16919 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2011–1090; Directorate Identifier 2011–NM–138–AD; Amendment 39–16986; AD 2012–06–05] RIN 2120–AA64 Airworthiness Directives; Bombardier, Inc. Airplanes Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule. AGENCY: We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model DHC–8–400 series airplanes. This AD was prompted by a report of the inability to open the airstair door while on the ground, because the airstair door seal did not deflate, which prevented the airstair door from opening. This AD requires changing the wiring that controls the pneumatic shut-off valve. We are issuing this AD to prevent the airstair door seal from not deflating, which could result in the airstair door not opening and could impede evacuation in the event of an emergency. DATES: This AD becomes effective April 27, 2012. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of April 27, 2012. ADDRESSES: You may examine the AD docket on the Internet at http:// www.regulations.gov or in person at the U.S. Department of Transportation, Docket Operations, M–30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE., Washington, DC. FOR FURTHER INFORMATION CONTACT: Cesar Gomez, Aerospace Engineer, Airframe and Mechanical Systems Branch, ANE–171, FAA, New York Aircraft Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone (516) 228– 7318; fax (516) 794–5531. SUPPLEMENTARY INFORMATION: SUMMARY: Discussion We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to the specified products. That NPRM was published in the Federal Register on October 19, 2011 (76 FR 64847). That NPRM proposed to correct an unsafe condition for the specified products. The MCAI states: E:\FR\FM\23MRR1.SGM 23MRR1 16920 Federal Register / Vol. 77, No. 57 / Friday, March 23, 2012 / Rules and Regulations One case of the inability to open the airstair door while on ground was reported in service. The airstair door seal did not deflate, preventing the airstair door from opening. It was found that the existing airstair door pneumatic shut-off valve control logic prevents the airstair door seal from deflating due to a single Input/Output Module failure under certain conditions. The inability to open the airstair door could impede evacuation in the event of an emergency. This [Canadian] directive mandates the wiring changes [ModSum 4–126513, Seal System Shut Off Valve Control Logic Change] to prevent the above-mentioned failure conditions. You may obtain further information by examining the MCAI in the AD docket. Comments We gave the public the opportunity to participate in developing this AD. We have considered the comment received. Support for the Intent of the NPRM (76 FR 64847, October 19, 2011) Air Line Pilots Association, International (ALPA), supports the intent of the NPRM (76 FR 64847, October 19, 2011). srobinson on DSK4SPTVN1PROD with RULES Recommendation To Reduce Compliance Time ALPA recommends that the compliance time proposed in the NPRM (76 FR 64847, October 19, 2011) be reduced to not exceed 3,000 flight hours or 12 months, whichever occurs first, instead of within 6,000 flight hours as specified in the NPRM. We disagree with the commenter’s recommendation to reduce the compliance time. We have determined that within 6,000 flight hours represents an appropriate interval of time in which the required actions can be performed. Transport Canada Civil Aviation (TCCA), in issuing their Canadian Airworthiness Directive CF–2011–15, dated June 20, 2011, has assessed the risk involved with that action, and through that assessment derived the compliance time, with which the manufacturer, Bombardier, Inc., has concurred. The AD does allow operators to comply earlier than the 6,000 flight hours. However, if additional data are presented that would justify a shorter compliance time, we might consider further rulemaking. We have not changed the AD in this regard. Explanation of Change Made to This AD We have revised the wording of paragraph (h) of this AD; this change does not change the intent of that paragraph. VerDate Mar<15>2010 16:27 Mar 22, 2012 Jkt 226001 Conclusion We reviewed the available data, including the comment received, and determined that air safety and the public interest require adopting the AD with the change described previously and minor editorial changes. We have determined that these minor changes: • Are consistent with the intent that was proposed in the NPRM (76 FR 64847, October 19, 2011) for correcting the unsafe condition; and • Do not add any additional burden upon the public than was already proposed in the NPRM (76 FR 64847, October 19, 2011). Costs of Compliance We estimate that this AD will affect about 81 products of U.S. registry. We also estimate that it will take about 12 work-hours per product to comply with the basic requirements of this AD. The average labor rate is $85 per work-hour. Required parts will cost about $0 per product. Where the service information lists required parts costs that are covered under warranty, we have assumed that there will be no charge for these parts. As we do not control warranty coverage for affected parties, some parties may incur costs higher than estimated here. Based on these figures, we estimate the cost of this AD to the U.S. operators to be $82,620, or $1,020 per product. 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 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 AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, PO 00000 Frm 00014 Fmt 4700 Sfmt 4700 or on the distribution of power and responsibilities among the various levels of government. For the reasons discussed above, 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; 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 a regulatory evaluation of the estimated costs to comply with this AD and placed it in the AD docket. 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 the NPRM (76 FR 64847, October 19, 2011), the regulatory 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. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 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. § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new AD: ■ 2012–06–05 Bombardier, Inc.: Amendment 39–16986. Docket No. FAA–2011–1090; Directorate Identifier 2011–NM–138–AD. (a) Effective Date This airworthiness directive (AD) becomes effective April 27, 2012. (b) Affected ADs None. E:\FR\FM\23MRR1.SGM 23MRR1 Federal Register / Vol. 77, No. 57 / Friday, March 23, 2012 / Rules and Regulations (c) Applicability This AD applies to Bombardier, Inc. Model DHC–8–400, –401, and –402 airplanes, certificated in any category, serial numbers 4001 through 4361 inclusive. (d) Subject Air Transport Association (ATA) of America Code 52: Doors. (e) Reason This AD was prompted by a report of the inability to open the airstair door while on the ground, because the airstair door seal did not deflate, which prevented the airstair door from opening. We are issuing this AD to prevent the airstair door seal from not deflating, which could result in the airstair door not opening and could impede evacuation in the event of an emergency. (f) Compliance You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. (g) Actions Within 6,000 flight hours after the effective date of this AD: Incorporate ModSum 4– 126513, Seal System Shut Off Valve Control Logic Change, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 84–52–69, Revision C, dated June 28, 2011. srobinson on DSK4SPTVN1PROD with RULES (h) Credit for Previous Actions This paragraph provides credit for the actions required by paragraph (g) of this AD, if the actions were performed before the effective date of this AD using Bombardier Service Bulletin 84–52–69, dated January 28, 2011; Revision A, dated April 26, 2011; or Revision B, dated May 9, 2011. (i) Other FAA AD Provisions The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, New York Aircraft Certification Office (ACO), ANE–170, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the ACO, send it to Attn: Program Manager, Continuing Operational Safety, FAA, New York ACO, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone 516–228–7300; fax 516–794–5531. Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/ certificate holding district office. The AMOC approval letter must specifically reference this AD. (2) Airworthy Product: For any requirement in this AD to obtain corrective actions from a manufacturer or other source, use these actions if they are FAA-approved. Corrective actions are considered FAA-approved if they are approved by the State of Design Authority (or their delegated agent). You are required VerDate Mar<15>2010 16:27 Mar 22, 2012 Jkt 226001 to assure the product is airworthy before it is returned to service. (j) Related Information Refer to MCAI Canadian Airworthiness Directive CF–2011–15, dated June 20, 2011; and Bombardier Service Bulletin 84–52–69, Revision C, dated June 28, 2011; for related information. (k) Material Incorporated by Reference (1) You must use the following service information to do the actions required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approved the incorporation by reference (IBR) of the following service information under 5 U.S.C. 552(a) and 1 CFR part 51: (i) Bombardier Service Bulletin 84–52–69, Revision C, dated June 28, 2011. (2) For service information identified in this AD, contact Bombardier, Inc., Q-Series Technical Help Desk, 123 Garratt Boulevard, Toronto, Ontario M3K 1Y5, Canada; telephone 416–375–4000; fax 416–375–4539; email thd.qseries@aero.bombardier.com; Internet http://www.bombardier.com. (3) You may review copies of the service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington. For information on the availability of this material at the FAA, call 425–227–1221. (4) You may also review copies of the service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at an NARA facility, call 202–741– 6030, or go to http://www.archives.gov/ federal_register/code_of_federal_regulations/ ibr_locations.html. Issued in Renton, Washington, on March 9, 2012. Ali Bahrami Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2012–6530 Filed 3–22–12; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2011–1194; Directorate Identifier 2011–NE–36–AD; Amendment 39– 16999; AD 2012–06–18] 16921 PW4156A, PW4158, PW4160, PW4460, PW4462, and PW4650 turbofan engines, including models with any dash number suffix. This AD was prompted by reports of five engine in-flight shutdowns and seven unplanned engine removals. This AD requires inspections, cleaning, and engine modifications to address coking in the No. 4 bearing compartment and in the oil pressure and scavenge tubes. We are issuing this AD to prevent an engine fire, a fractured fan drive shaft, and damage to the airplane. DATES: This AD is effective April 27, 2012. For service information identified in this AD, contact Pratt & Whitney, 400 Main St., East Hartford, CT 06108; phone: 860–565–8770; fax: 860–565–4503. You may review copies of the referenced service information at the FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA. For information on the availability of this material at the FAA, call 781–238–7125. ADDRESSES: Examining the AD Docket You may examine the AD docket on the Internet at http:// www.regulations.gov; or in person at the Docket Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this AD, the regulatory evaluation, any comments received, and other information. The address for the Docket Office (phone: 800–647–5527) is Document Management Facility, U.S. Department of Transportation, Docket Operations, M–30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE., Washington, DC 20590. FOR FURTHER INFORMATION CONTACT: James Gray, Aerospace Engineer, Engine & Propeller Directorate, FAA, 12 New England Executive Park, Burlington, MA 01803; phone: 781–238–7742; fax: 781– 238–7199; email: james.e.gray@faa.gov. SUPPLEMENTARY INFORMATION: RIN 2120–AA64 Discussion Airworthiness Directives; Pratt & Whitney Division Turbofan Engines We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to the specified products. That NPRM published in the Federal Register on November 23, 2011 (76 FR 72353). That NPRM proposed to require inspections, cleaning, and engine modifications to address coking in the No. 4 bearing compartment and oil pressure and scavenge tubes. Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: We are adopting a new airworthiness directive (AD) for all Pratt & Whitney PW4050, PW4052, PW4056, PW4060, PW4060A, PW4060C, PW4062, PW4062A, PW4152, PW4156, SUMMARY: PO 00000 Frm 00015 Fmt 4700 Sfmt 4700 E:\FR\FM\23MRR1.SGM 23MRR1

Agencies

[Federal Register Volume 77, Number 57 (Friday, March 23, 2012)]
[Rules and Regulations]
[Pages 16919-16921]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2012-6530]


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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2011-1090; Directorate Identifier 2011-NM-138-AD; 
Amendment 39-16986; AD 2012-06-05]
RIN 2120-AA64


Airworthiness Directives; Bombardier, Inc. Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Final rule.

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

SUMMARY: We are adopting a new airworthiness directive (AD) for certain 
Bombardier, Inc. Model DHC-8-400 series airplanes. This AD was prompted 
by a report of the inability to open the airstair door while on the 
ground, because the airstair door seal did not deflate, which prevented 
the airstair door from opening. This AD requires changing the wiring 
that controls the pneumatic shut-off valve. We are issuing this AD to 
prevent the airstair door seal from not deflating, which could result 
in the airstair door not opening and could impede evacuation in the 
event of an emergency.

DATES: This AD becomes effective April 27, 2012.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of April 27, 
2012.

ADDRESSES: You may examine the AD docket on the Internet at http://www.regulations.gov or in person at the U.S. Department of 
Transportation, Docket Operations, M-30, West Building Ground Floor, 
Room W12-140, 1200 New Jersey Avenue SE., Washington, DC.

FOR FURTHER INFORMATION CONTACT: Cesar Gomez, Aerospace Engineer, 
Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft 
Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New 
York 11590; telephone (516) 228-7318; fax (516) 794-5531.

SUPPLEMENTARY INFORMATION: 

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to include an AD that would apply to the specified products. 
That NPRM was published in the Federal Register on October 19, 2011 (76 
FR 64847). That NPRM proposed to correct an unsafe condition for the 
specified products. The MCAI states:


[[Page 16920]]


    One case of the inability to open the airstair door while on 
ground was reported in service. The airstair door seal did not 
deflate, preventing the airstair door from opening. It was found 
that the existing airstair door pneumatic shut-off valve control 
logic prevents the airstair door seal from deflating due to a single 
Input/Output Module failure under certain conditions. The inability 
to open the airstair door could impede evacuation in the event of an 
emergency.
    This [Canadian] directive mandates the wiring changes [ModSum 4-
126513, Seal System Shut Off Valve Control Logic Change] to prevent 
the above-mentioned failure conditions.

You may obtain further information by examining the MCAI in the AD 
docket.

Comments

    We gave the public the opportunity to participate in developing 
this AD. We have considered the comment received.

Support for the Intent of the NPRM (76 FR 64847, October 19, 2011)

    Air Line Pilots Association, International (ALPA), supports the 
intent of the NPRM (76 FR 64847, October 19, 2011).

Recommendation To Reduce Compliance Time

    ALPA recommends that the compliance time proposed in the NPRM (76 
FR 64847, October 19, 2011) be reduced to not exceed 3,000 flight hours 
or 12 months, whichever occurs first, instead of within 6,000 flight 
hours as specified in the NPRM.
    We disagree with the commenter's recommendation to reduce the 
compliance time. We have determined that within 6,000 flight hours 
represents an appropriate interval of time in which the required 
actions can be performed. Transport Canada Civil Aviation (TCCA), in 
issuing their Canadian Airworthiness Directive CF-2011-15, dated June 
20, 2011, has assessed the risk involved with that action, and through 
that assessment derived the compliance time, with which the 
manufacturer, Bombardier, Inc., has concurred. The AD does allow 
operators to comply earlier than the 6,000 flight hours. However, if 
additional data are presented that would justify a shorter compliance 
time, we might consider further rulemaking. We have not changed the AD 
in this regard.

Explanation of Change Made to This AD

    We have revised the wording of paragraph (h) of this AD; this 
change does not change the intent of that paragraph.

Conclusion

    We reviewed the available data, including the comment received, and 
determined that air safety and the public interest require adopting the 
AD with the change described previously and minor editorial changes. We 
have determined that these minor changes:
     Are consistent with the intent that was proposed in the 
NPRM (76 FR 64847, October 19, 2011) for correcting the unsafe 
condition; and
     Do not add any additional burden upon the public than was 
already proposed in the NPRM (76 FR 64847, October 19, 2011).

Costs of Compliance

    We estimate that this AD will affect about 81 products of U.S. 
registry. We also estimate that it will take about 12 work-hours per 
product to comply with the basic requirements of this AD. The average 
labor rate is $85 per work-hour. Required parts will cost about $0 per 
product. Where the service information lists required parts costs that 
are covered under warranty, we have assumed that there will be no 
charge for these parts. As we do not control warranty coverage for 
affected parties, some parties may incur costs higher than estimated 
here. Based on these figures, we estimate the cost of this AD to the 
U.S. operators to be $82,620, or $1,020 per product.

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 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 AD will not have federalism implications 
under Executive Order 13132. This AD will 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 above, 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; 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 a regulatory evaluation of the estimated costs to 
comply with this AD and placed it in the AD docket.

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 the NPRM (76 FR 64847, October 19, 
2011), the regulatory 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.

List of Subjects in 14 CFR Part 39

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

Adoption of the Amendment

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

PART 39--AIRWORTHINESS DIRECTIVES

0
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]

0
2. The FAA amends Sec.  39.13 by adding the following new AD:

2012-06-05 Bombardier, Inc.: Amendment 39-16986. Docket No. FAA-
2011-1090; Directorate Identifier 2011-NM-138-AD.

(a) Effective Date

    This airworthiness directive (AD) becomes effective April 27, 
2012.

(b) Affected ADs

    None.

[[Page 16921]]

(c) Applicability

    This AD applies to Bombardier, Inc. Model DHC-8-400, -401, and -
402 airplanes, certificated in any category, serial numbers 4001 
through 4361 inclusive.

(d) Subject

    Air Transport Association (ATA) of America Code 52: Doors.

(e) Reason

    This AD was prompted by a report of the inability to open the 
airstair door while on the ground, because the airstair door seal 
did not deflate, which prevented the airstair door from opening. We 
are issuing this AD to prevent the airstair door seal from not 
deflating, which could result in the airstair door not opening and 
could impede evacuation in the event of an emergency.

(f) Compliance

    You are responsible for having the actions required by this AD 
performed within the compliance times specified, unless the actions 
have already been done.

(g) Actions

    Within 6,000 flight hours after the effective date of this AD: 
Incorporate ModSum 4-126513, Seal System Shut Off Valve Control 
Logic Change, in accordance with the Accomplishment Instructions of 
Bombardier Service Bulletin 84-52-69, Revision C, dated June 28, 
2011.

(h) Credit for Previous Actions

    This paragraph provides credit for the actions required by 
paragraph (g) of this AD, if the actions were performed before the 
effective date of this AD using Bombardier Service Bulletin 84-52-
69, dated January 28, 2011; Revision A, dated April 26, 2011; or 
Revision B, dated May 9, 2011.

(i) Other FAA AD Provisions

    The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, New 
York Aircraft Certification Office (ACO), ANE-170, FAA, has the 
authority to approve AMOCs for this AD, if requested using the 
procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, 
send your request to your principal inspector or local Flight 
Standards District Office, as appropriate. If sending information 
directly to the ACO, send it to Attn: Program Manager, Continuing 
Operational Safety, FAA, New York ACO, 1600 Stewart Avenue, Suite 
410, Westbury, New York 11590; telephone 516-228-7300; fax 516-794-
5531. Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager 
of the local flight standards district office/certificate holding 
district office. The AMOC approval letter must specifically 
reference this AD.
    (2) Airworthy Product: For any requirement in this AD to obtain 
corrective actions from a manufacturer or other source, use these 
actions if they are FAA-approved. Corrective actions are considered 
FAA-approved if they are approved by the State of Design Authority 
(or their delegated agent). You are required to assure the product 
is airworthy before it is returned to service.

(j) Related Information

    Refer to MCAI Canadian Airworthiness Directive CF-2011-15, dated 
June 20, 2011; and Bombardier Service Bulletin 84-52-69, Revision C, 
dated June 28, 2011; for related information.

(k) Material Incorporated by Reference

    (1) You must use the following service information to do the 
actions required by this AD, unless the AD specifies otherwise. The 
Director of the Federal Register approved the incorporation by 
reference (IBR) of the following service information under 5 U.S.C. 
552(a) and 1 CFR part 51:
    (i) Bombardier Service Bulletin 84-52-69, Revision C, dated June 
28, 2011.
    (2) For service information identified in this AD, contact 
Bombardier, Inc., Q-Series Technical Help Desk, 123 Garratt 
Boulevard, Toronto, Ontario M3K 1Y5, Canada; telephone 416-375-4000; 
fax 416-375-4539; email thd.qseries@aero.bombardier.com; Internet 
http://www.bombardier.com.
    (3) You may review copies of the service information at the FAA, 
Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, 
Washington. For information on the availability of this material at 
the FAA, call 425-227-1221.
    (4) You may also review copies of the service information that 
is incorporated by reference at the National Archives and Records 
Administration (NARA). For information on the availability of this 
material at an NARA facility, call 202-741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/
ibr_locations.html.

    Issued in Renton, Washington, on March 9, 2012.
Ali Bahrami
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2012-6530 Filed 3-22-12; 8:45 am]
BILLING CODE 4910-13-P