Airworthiness Directives; The Boeing Company Model MD-90-30 Airplanes, 15800-15802 [2011-6249]

Download as PDF Emcdonald on DSK2BSOYB1PROD with RULES 15800 Federal Register / Vol. 76, No. 55 / Tuesday, March 22, 2011 / Rules and Regulations 6. Occupancy of the lift must be limited to a single occupant secured in one of two possible configurations: a. The occupant must be secured to a medical stretcher that is attached to the lift platform. The occupied stretcher must be designed to withstand the nonemergency load conditions defined in loads report SIE–327–301, revision D. b. The occupant must be secured to a wheelchair that is attached to the lift platform. 7. Control panels must be located on both main and upper decks, connected with full duplex audio communications. On both operator control units, an emergency shut-off switch must be installed. In an emergency, this switch must immediately interrupt the main power supply to the motors. Lift operation must be stopped until the emergency shut-off switch is reset. As soon as one of the operators commands operation in a direction, the ‘‘Up’’ and ‘‘Down’’ option buttons must be disabled and the stop button enabled. Before one of the operators is able to change the lift-travel direction again, the lift must first be stopped. 8. Lift operation must require a trained operator at the main-deck control panel and a trained observer at the upper-deck control panel. 9. Sensors must be installed to detect the following conditions, and to prevent the start or continuation of lift travel if any conditions are not met: a. Upper-deck seat, located on the left side of the aircraft and just forward of the master-bath bulkhead, is in its most forward, outboard position. b. Upper-deck master-bedroom/ lavatory port bulkhead is opened and secured. c. Upper-deck shower door is closed and secured. d. Upper-deck master-lavatory door is opened and secured. e. Upper-deck floor panels are opened and configured to form the protective fencing. f. Main-deck inboard doors are closed and secured. The doors must be lockable only from the outside of the lift. This ensures that the operator has control of this area and that nobody is located under the lift. g. Aircraft seat-belt-fasten signs must not be illuminated. 10. Sensors must be installed to detect the following conditions during operation, and to prevent continued lift travel if any of these conditions occur: a. Over-temperature of lift motors and/or power-frequency converter. b. Presence of smoke at motors and in electrical-control cabinet. c. Over-current at the lift motors. d. Asynchronous operation of the spindles. VerDate Mar<15>2010 16:40 Mar 21, 2011 Jkt 223001 11. A built-in fire extinguisher must be installed in the motor and electricalcontrol cabinet. This fire extinguisher must be designed to discharge automatically upon the occurrence of a fire. 12. The lift must have the provision for manual operation in the event of a malfunction such as a loss of power to the lift and/or associated systems. 13. A separate battery backup system must provide lighting for the lift-control system, lift control/sensors, communication system, and lift lights for a minimum of 10 minutes in the event of loss of power to the lift and/or associated systems. 14. Lift placards must be installed near or adjacent the control panels identified in special condition 7. The placards must be stated as follows: a. THIS LIFT IS APPROVED FOR MOVING ONLY A SINGLE OCCUPANT BETWEEN THE MAIN AND UPPER DECKS AND ONLY WHEN SECURED TO EITHER AN APPROVED MEDICAL STRETCHER OR WHEELCHAIR. NO OTHER USES OF THIS LIFT ARE APPROVED. b. DO NOT OPERATE LIFT DURING TAXI, TAKEOFF, LANDING, OR TURBULENCE. c. AN APPROVED MEDICAL STRETCHER OR WHEELCHAIR MUST BE PROPERLY SECURED TO THE LIFT PLATFORM BEFORE OPERATING THIS LIFT. d. THE LIFT MUST BE STOWED FOR TAXI, TAKEOFF, AND LANDING. THE STOWED POSITION REQUIRES THE LIFT PLATFORM POSITIONED AT THE MAIN–DECK LEVEL WITH THE FLOOR PANELS CLOSED. e. DURING MEDICAL–STRETCHER TRANSPORT, ALL PERSONNEL, MATERIEL, AND PATIENT EXTREMETIES MUST BE POSITIONED BETWEEN THE HEAD AND FOOT OF THE STRETCHER. f. LIFT MAXIMUM CAPACITY: X LBS (X KG) 15. Lift operational-instruction placards must be installed near the control panels and must describe how to: a. Configure the lift for operation, including ensuring that the bottom of the lift is clear of personnel and materiel before lowering the lift from the upper deck. b. Operate the lift. c. Stow the lift for non-operation such as during TTL and turbulence. d. Operate the mechanical-override features in the event of a malfunction such as a loss of power to the lift and/ or associated systems. 16. Training and related manuals must include: PO 00000 Frm 00010 Fmt 4700 Sfmt 4700 a. Limitations and procedures for normal lift operation. b. Backup and override procedure for evacuating the lift and returning it to TTL configuration. 17. Special conditions nos. 3, 4, and 14 must be documented in the Limitations section of the airplane flight manual. Issued in Renton, Washington, on February 3, 2011. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2011–6618 Filed 3–21–11; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2010–1202; Directorate Identifier 2010–NM–167–AD; Amendment 39–16637; AD 2011–06–12] RIN 2120–AA64 Airworthiness Directives; The Boeing Company Model MD–90–30 Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: We are adopting a new airworthiness directive (AD) for the products listed above. This AD requires repetitive inspections for cracking of the left and right upper center skin panels of the horizontal stabilizer, and corrective action if necessary. This AD was prompted by a report of a crack found in the upper skin panel at the aft inboard corner of a right horizontal stabilizer. We are issuing this AD to detect and correct cracks in the upper center skin panels of the horizontal stabilizer. Uncorrected cracks might ultimately lead to the loss of overall structural integrity of the horizontal stabilizer. DATES: This AD is effective April 26, 2011. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in the AD as of April 26, 2011. ADDRESSES: For service information identified in this AD, contact Boeing Commercial Airplanes, Attention: Data & Services Management, 3855 Lakewood Boulevard, MC D800–0019, Long Beach, California 90846–0001; phone: 206–544–5000, extension 2; fax: 206–766–5683; e-mail: dse.boecom@boeing.com; Internet: https://www.myboeingfleet.com. You SUMMARY: E:\FR\FM\22MRR1.SGM 22MRR1 Federal Register / Vol. 76, No. 55 / Tuesday, March 22, 2011 / Rules and Regulations may review copies of the referenced 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. Examining the AD Docket You may examine the AD docket on the Internet at https:// 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: Roger Durbin, Aerospace Engineer, Los Angeles ACO, Airframe Branch, ANM– 120L, FAA, 3960 Paramount Boulevard, Lakewood, CA 90712–4137; phone: 562–627–5233; fax: 562–627–5210; e-mail: Roger.Durbin@faa.gov. SUPPLEMENTARY INFORMATION: Discussion We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an airworthiness directive (AD) that would apply to the specified products. That NPRM published in the Federal Register on December 23, 2010 (75 FR 80742). That NPRM proposed to require repetitive inspections for cracking of the left and right upper center skin panels of the horizontal stabilizer, and corrective action if necessary. Comments We gave the public the opportunity to participate in developing this AD. We received no comments on the NPRM or on the determination of the cost to the public. Explanation of Change to Applicability We have revised the applicability of the existing AD to identify model 15801 designations as published in the most recent type certificate data sheet for the affected models. Conclusion We reviewed the relevant data, and determined that air safety and the public interest require adopting the AD with the change described previously. We have determined that these minor changes: • Are consistent with the intent that was proposed in the NPRM for correcting the unsafe condition; and • Do not add any additional burden upon the public than was already proposed in the NPRM. We also determined that these changes will not increase the economic burden on any operator or increase the scope of the AD. Costs of Compliance We estimate that this AD affects 19 airplanes of U.S. registry. We estimate the following costs to comply with this AD: ESTIMATED COSTS Action Labor cost Parts cost Inspection ........... 4 work-hours × $85 per hour = $340 per inspection cycle. We estimate the following costs to do any necessary repairs that would be $0 Cost per product Cost on U.S. operators $340 per inspection cycle .............. required based on the results of the inspection. We have no way of $6,460 per inspection cycle. determining the number of aircraft that might need these repairs. ON-CONDITION COSTS Action Labor cost Skin panel replacement ................................................ 648 work-hours × $85 per hour = $55,080 .................. Emcdonald on DSK2BSOYB1PROD with RULES 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 VerDate Mar<15>2010 16:40 Mar 21, 2011 Jkt 223001 because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. Regulatory Findings 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 that this AD: (1) Is not a ‘‘significant regulatory action’’ under Executive Order 12866, PO 00000 Frm 00011 Fmt 4700 Sfmt 4700 Parts cost $55,608 Cost per product $110,688 (2) Is not a ‘‘significant rule’’ under 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. 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: E:\FR\FM\22MRR1.SGM 22MRR1 15802 Federal Register / Vol. 76, No. 55 / Tuesday, March 22, 2011 / Rules and Regulations Alternative Methods of Compliance (AMOCs) 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): ■ 2011–06–12 The Boeing Company: Amendment 39–16637; Docket No. FAA–2010–1202; Directorate Identifier 2010–NM–167–AD. Effective Date (a) This AD is effective April 26, 2011. Affected ADs (b) None. Applicability (c) This AD applies to all The Boeing Company Model MD–90–30 airplanes, certificated in any category. Subject (d) Joint Aircraft System Component (JASC)/Air Transport Association (ATA) of America Code 55, Stabilizers. Unsafe Condition (e) This AD was prompted by a report of a crack found in the upper center skin panel at the aft inboard corner of a right horizontal stabilizer. We are issuing this AD to detect and correct cracks in the upper center skin panel of the horizontal stabilizer. Uncorrected cracks might ultimately lead to the loss of overall structural integrity of the horizontal stabilizer. Emcdonald on DSK2BSOYB1PROD with RULES Compliance (f) Comply with this AD within the compliance times specified, unless already done. Inspections (g) Before the accumulation of 20,000 total flight cycles, or within 3,778 flight cycles after the effective date of this AD, whichever occurs later, do eddy current inspections to detect cracking of the left and right upper center skin panels of the horizontal stabilizer, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin MD90–55A015, dated July 16, 2010. (1) If no crack is found during any inspection required by paragraph (g) of this AD, repeat the applicable inspections thereafter at the applicable times specified in paragraph 1.E., ‘‘Compliance,’’ of Boeing Alert Service Bulletin MD90–55A015, dated July 16, 2010. (2) If any crack is found during any inspection required by paragraph (g) of this AD, before further flight, replace the skin panel with a serviceable skin panel, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin MD90–55A015, dated July 16, 2010. Within 20,000 flight cycles after the replacement, do eddy current inspections as required by paragraph (g) of this AD. VerDate Mar<15>2010 16:40 Mar 21, 2011 Jkt 223001 (h)(1) The Manager, Los Angeles Aircraft Certification Office (ACO), 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 manager of the ACO, send it to the attention of the person identified in the Related Information section of this AD. (2) 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. (3) An AMOC that provides an acceptable level of safety may be used for any repair required by this AD if it is approved by the Boeing Commercial Airplanes Organization Designation Authorization (ODA) that has been authorized by the Manager, Los Angeles ACO, to make those findings. For a repair method to be approved, the repair must meet the certification basis of the airplane, and 14 CFR 25.571, Amendment 45, and the approval must specifically refer to this AD. Issued in Renton, Washington, on March 9, 2011. Kalene C. Yanamura, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2011–6249 Filed 3–21–11; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2011–0212; Directorate Identifier 2010–SW–055–AD; Amendment 39–16632; AD 2011–06–07] RIN 2120–AA64 Airworthiness Directives; Eurocopter France (Eurocopter) Model EC130 B4 Helicopters Federal Aviation Administration, DOT. ACTION: Final rule; request for comments. AGENCY: This amendment adopts a new airworthiness directive (AD) for (i) For more information about this AD, Eurocopter Model EC130 B4 helicopters. contact Roger Durbin, Aerospace Engineer, This action requires identifying and Los Angeles ACO, Airframe Branch, ANM– inspecting a certain emergency flotation 120L, FAA, 3960 Paramount Boulevard, gear unit ‘‘1G’’ (1G unit). This action also Lakewood, CA 90712–4137; phone: 562–627– requires modification of certain affected 5233; fax: 562–627–5210; e-mail: 1G units. This amendment is prompted Roger.Durbin@faa.gov. by an uncommanded in-flight Material Incorporated by Reference deployment of the emergency flotation (j) You must use Boeing Alert Service gear when it was not armed by the crew. Bulletin MD90–55A015, dated July 16, 2010, The actions specified in this AD are to do the actions required by this AD, unless intended to prevent an uncommanded the AD specifies otherwise. in-flight deployment of the emergency (1) The Director of the Federal Register flotation gear, unexpected deceleration approved the incorporation by reference of and pitch down movement of the Boeing Alert Service Bulletin MD90–55A015, helicopter, and subsequent loss of dated July 16, 2010, under 5 U.S.C. 552(a) control of the helicopter. and 1 CFR part 51. DATES: Effective April 6, 2011. (2) For service information identified in The incorporation by reference of this AD, contact Boeing Commercial certain publications listed in the Airplanes, Attention: Data & Services Management, 3855 Lakewood Boulevard, MC regulations is approved by the Director of the Federal Register as of April 6, D800–0019, Long Beach, California 90846– 0001; phone: 206–544–5000, extension 2; fax: 2011. 206–766–5683; e-mail: Comments for inclusion in the Rules dse.boecom@boeing.com; Internet: https:// Docket must be received on or before www.myboeingfleet.com. May 23, 2011. (3) You may review copies of the service ADDRESSES: Use one of the following information at the FAA, Transport Airplane addresses to submit comments on this Directorate, 1601 Lind Avenue, SW., Renton, AD: Washington. For information on the • Federal eRulemaking Portal: Go to availability of this material at the FAA, call https://www.regulations.gov. Follow the 425–227–1221. instructions for submitting comments. (4) You may also review copies of the • Fax: 202–493–2251. service information that is incorporated by • Mail: U.S. Department of reference at the National Archives and Transportation, Docket Operations, M– Records Administration (NARA). For 30, West Building Ground Floor, Room information on the availability of this W12–140, 1200 New Jersey Avenue, SE., material at an NARA facility, call 202–741– Washington, DC 20590. 6030, or go to https://www.archives.gov/ • Hand Delivery: U.S. Department of federal_register/code_of_federal_regulations/ Transportation, Docket Operations, M– ibr_locations.html. SUMMARY: Related Information PO 00000 Frm 00012 Fmt 4700 Sfmt 4700 E:\FR\FM\22MRR1.SGM 22MRR1

Agencies

[Federal Register Volume 76, Number 55 (Tuesday, March 22, 2011)]
[Rules and Regulations]
[Pages 15800-15802]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2011-6249]


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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2010-1202; Directorate Identifier 2010-NM-167-AD; 
Amendment 39-16637; AD 2011-06-12]
RIN 2120-AA64


Airworthiness Directives; The Boeing Company Model MD-90-30 
Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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

SUMMARY: We are adopting a new airworthiness directive (AD) for the 
products listed above. This AD requires repetitive inspections for 
cracking of the left and right upper center skin panels of the 
horizontal stabilizer, and corrective action if necessary. This AD was 
prompted by a report of a crack found in the upper skin panel at the 
aft inboard corner of a right horizontal stabilizer. We are issuing 
this AD to detect and correct cracks in the upper center skin panels of 
the horizontal stabilizer. Uncorrected cracks might ultimately lead to 
the loss of overall structural integrity of the horizontal stabilizer.

DATES: This AD is effective April 26, 2011.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in the AD as of April 26, 
2011.

ADDRESSES: For service information identified in this AD, contact 
Boeing Commercial Airplanes, Attention: Data & Services Management, 
3855 Lakewood Boulevard, MC D800-0019, Long Beach, California 90846-
0001; phone: 206-544-5000, extension 2; fax: 206-766-5683; e-mail: 
dse.boecom@boeing.com; Internet: https://www.myboeingfleet.com. You

[[Page 15801]]

may review copies of the referenced 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.

Examining the AD Docket

    You may examine the AD docket on the Internet at https://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: Roger Durbin, Aerospace Engineer, Los 
Angeles ACO, Airframe Branch, ANM-120L, FAA, 3960 Paramount Boulevard, 
Lakewood, CA 90712-4137; phone: 562-627-5233; fax: 562-627-5210; e-
mail: Roger.Durbin@faa.gov.

SUPPLEMENTARY INFORMATION:

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to include an airworthiness directive (AD) that would apply to 
the specified products. That NPRM published in the Federal Register on 
December 23, 2010 (75 FR 80742). That NPRM proposed to require 
repetitive inspections for cracking of the left and right upper center 
skin panels of the horizontal stabilizer, and corrective action if 
necessary.

Comments

    We gave the public the opportunity to participate in developing 
this AD. We received no comments on the NPRM or on the determination of 
the cost to the public.

Explanation of Change to Applicability

    We have revised the applicability of the existing AD to identify 
model designations as published in the most recent type certificate 
data sheet for the affected models.

Conclusion

    We reviewed the relevant data, and determined that air safety and 
the public interest require adopting the AD with the change described 
previously. We have determined that these minor changes:
     Are consistent with the intent that was proposed in the 
NPRM for correcting the unsafe condition; and
     Do not add any additional burden upon the public than was 
already proposed in the NPRM.
    We also determined that these changes will not increase the 
economic burden on any operator or increase the scope of the AD.

Costs of Compliance

    We estimate that this AD affects 19 airplanes of U.S. registry.
    We estimate the following costs to comply with this AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                                Cost on U.S.
              Action                    Labor cost        Parts cost    Cost per product          operators
----------------------------------------------------------------------------------------------------------------
Inspection.......................  4 work-hours x $85             $0  $340 per inspection   $6,460 per
                                    per hour = $340 per                cycle.                inspection cycle.
                                    inspection cycle.
----------------------------------------------------------------------------------------------------------------

     We estimate the following costs to do any necessary repairs that 
would be required based on the results of the inspection. We have no 
way of determining the number of aircraft that might need these 
repairs.

                                               On-Condition Costs
----------------------------------------------------------------------------------------------------------------
                                                                                                     Cost per
                    Action                                 Labor cost               Parts cost        product
----------------------------------------------------------------------------------------------------------------
Skin panel replacement........................  648 work-hours x $85 per hour =          $55,608        $110,688
                                                 $55,080.
----------------------------------------------------------------------------------------------------------------

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

    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 that this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Is not a ``significant rule'' under 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.

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:

[[Page 15802]]

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 airworthiness 
directive (AD):

2011-06-12 The Boeing Company: Amendment 39-16637; Docket No. FAA-
2010-1202; Directorate Identifier 2010-NM-167-AD.

Effective Date

    (a) This AD is effective April 26, 2011.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to all The Boeing Company Model MD-90-30 
airplanes, certificated in any category.

Subject

    (d) Joint Aircraft System Component (JASC)/Air Transport 
Association (ATA) of America Code 55, Stabilizers.

Unsafe Condition

    (e) This AD was prompted by a report of a crack found in the 
upper center skin panel at the aft inboard corner of a right 
horizontal stabilizer. We are issuing this AD to detect and correct 
cracks in the upper center skin panel of the horizontal stabilizer. 
Uncorrected cracks might ultimately lead to the loss of overall 
structural integrity of the horizontal stabilizer.

Compliance

    (f) Comply with this AD within the compliance times specified, 
unless already done.

Inspections

    (g) Before the accumulation of 20,000 total flight cycles, or 
within 3,778 flight cycles after the effective date of this AD, 
whichever occurs later, do eddy current inspections to detect 
cracking of the left and right upper center skin panels of the 
horizontal stabilizer, in accordance with the Accomplishment 
Instructions of Boeing Alert Service Bulletin MD90-55A015, dated 
July 16, 2010.
    (1) If no crack is found during any inspection required by 
paragraph (g) of this AD, repeat the applicable inspections 
thereafter at the applicable times specified in paragraph 1.E., 
``Compliance,'' of Boeing Alert Service Bulletin MD90-55A015, dated 
July 16, 2010.
    (2) If any crack is found during any inspection required by 
paragraph (g) of this AD, before further flight, replace the skin 
panel with a serviceable skin panel, in accordance with the 
Accomplishment Instructions of Boeing Alert Service Bulletin MD90-
55A015, dated July 16, 2010. Within 20,000 flight cycles after the 
replacement, do eddy current inspections as required by paragraph 
(g) of this AD.

Alternative Methods of Compliance (AMOCs)

    (h)(1) The Manager, Los Angeles Aircraft Certification Office 
(ACO), 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 manager of the ACO, send it to the 
attention of the person identified in the Related Information 
section of this AD.
    (2) 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.
    (3) An AMOC that provides an acceptable level of safety may be 
used for any repair required by this AD if it is approved by the 
Boeing Commercial Airplanes Organization Designation Authorization 
(ODA) that has been authorized by the Manager, Los Angeles ACO, to 
make those findings. For a repair method to be approved, the repair 
must meet the certification basis of the airplane, and 14 CFR 
25.571, Amendment 45, and the approval must specifically refer to 
this AD.

Related Information

    (i) For more information about this AD, contact Roger Durbin, 
Aerospace Engineer, Los Angeles ACO, Airframe Branch, ANM-120L, FAA, 
3960 Paramount Boulevard, Lakewood, CA 90712-4137; phone: 562-627-
5233; fax: 562-627-5210; e-mail: Roger.Durbin@faa.gov.

Material Incorporated by Reference

    (j) You must use Boeing Alert Service Bulletin MD90-55A015, 
dated July 16, 2010, to do the actions required by this AD, unless 
the AD specifies otherwise.
    (1) The Director of the Federal Register approved the 
incorporation by reference of Boeing Alert Service Bulletin MD90-
55A015, dated July 16, 2010, under 5 U.S.C. 552(a) and 1 CFR part 
51.
    (2) For service information identified in this AD, contact 
Boeing Commercial Airplanes, Attention: Data & Services Management, 
3855 Lakewood Boulevard, MC D800-0019, Long Beach, California 90846-
0001; phone: 206-544-5000, extension 2; fax: 206-766-5683; e-mail: 
dse.boecom@boeing.com; Internet: https://www.myboeingfleet.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 https://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.

    Issued in Renton, Washington, on March 9, 2011.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2011-6249 Filed 3-21-11; 8:45 am]
BILLING CODE 4910-13-P
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