2010-3371. Airworthiness Directives; The Boeing Company Model 767 Airplanes

AGENCY:

Federal Aviation Administration (FAA), DOT.

ACTION:

Notice of proposed rulemaking (NPRM).

SUMMARY:

We propose to adopt a new airworthiness directive (AD) for certain Model 767-200, -300, -300F, and -400ER series airplanes. This proposed AD would require a detailed inspection of the entryway door movable ceiling panel for pin migration at either end of the hinge assembly and damage to the pin; a detailed inspection for correct crimp at both ends and damage to hinge stock; a detailed inspection of the ceiling area for any visible cosmetic and/or tie-rod chafing that could be caused by a migrated hinge pin; and a detailed inspection for wire damage and/or breakage; and other specified and corrective actions if necessary. This proposed AD results from reports of fault messages caused by improperly crimped hinge pins coming into contact with wires and causing damage. We are proposing this AD to detect and correct improperly crimped hinge pins, which could damage tie rods and wire bundles, causing shorts in many systems, including the spar fuel shut off valve, oxygen mask deployment, and burned wires, which could be an ignition source in a hidden area of the airplane.

DATES:

We must receive comments on this proposed AD by April 8, 2010.

ADDRESSES:

You may send comments by any of the following methods:

• Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
• Fax: [phone].
• Mail: U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC 20590.
• Hand Delivery: U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC 20590, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays.

For service information identified in this proposed AD, contact Boeing Commercial Airplanes, Attention: Data & Services Management, P.O. Box 3707, MC 2H-65, Seattle, Washington 98124-2207; telephone [phone], extension 1; fax [phone]; e-mail [e-mail]; Internet https://www.myboeingfleet.com. You 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 or 425-227-1152.

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 proposed AD, the regulatory evaluation, any comments received, and other information. The street address for the Docket Office (telephone [phone]) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT:

Shannon Lennon, Cabin Safety and Environmental Systems Branch, ANM-150S, FAA, Seattle Aircraft Certification Office (ACO), 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone [phone]; fax [phone].

SUPPLEMENTARY INFORMATION:

Comments Invited

We invite you to send any written relevant data, views, or arguments about this proposed AD. Send your comments to an address listed under the ADDRESSES section. Include “Docket No. FAA-2010-0127; Directorate Identifier 2009-NM-242-AD” at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this proposed AD. We will consider all comments received by the closing date and may amend this proposed AD because of those comments.

We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact we receive about this proposed AD.

Discussion

We received a report that an operator experienced several fault messages and circuit breakers tripping during a flight. An investigation revealed that the hinge pin on the movable ceiling panel of the entryway door on the forward left side had come into contact with some wire bundles, causing damaged, broken, and burned wires, resulting in system short circuits and circuit breakers tripping. There were also reported instances of migrating hinge pins causing minor cosmetic damage and tie-rod chafing. Boeing conducted a quality assurance investigation and determined that the cause of the migrating hinge pin resulted from the vendor not properly crimping the hinge assembly stock in accordance with specifications. This condition, if not corrected, could damage tie rods and wire bundles, causing shorts in many systems, including the spar fuel shut off valve, oxygen mask deployment, and burned wires, which could be an ignition source in a hidden area of the airplane.

Relevant Service Information

We have reviewed Boeing Service Bulletin 767-25-0477, dated August 27, 2009. The service bulletin describes procedures for doing the following detailed inspections:

• A detailed inspection for pin migration at either end of the hinge assembly and damage to the pin.
• A detailed inspection for correct crimp at both ends and damage to hinge stock.
• A detailed inspection of the ceiling area for any visible cosmetic and/or tie-rod chafing that could be caused by a migrated hinge pin.
• A detailed inspection for wire damage and/or breakage.

The service bulletin also describes other specified actions including re-partmarking the moveable panel assemblies and the hinge if necessary, and corrective actions, including crimping the hinge assembly, repairing tie-rod chafing, repairing wire damage, and replacing the hinge assembly.

FAA's Determination and Requirements of This Proposed AD

We are proposing this AD because we evaluated all relevant information and determined the unsafe condition described previously is likely to exist or develop in other products of the same type design. This proposed AD would require accomplishing the actions specified in the service information described previously.

Costs of Compliance

We estimate that this proposed AD would affect 273 airplanes of U.S. registry. We also estimate that it would take about 6 work-hours per product to comply with this proposed AD. The average labor rate is $85 per work-hour. Required parts would cost about $770 per product. Based on these figures, we estimate the cost of this proposed AD to the U.S. operators to be $349,440, or $1,280 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 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 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), 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.

You can find our regulatory evaluation and the estimated costs of compliance 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.

§ 39.13

[Amended]

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

The Boeing Company: Docket No. FAA-2010-0127; Directorate Identifier 2009-NM-242-AD.

Comments Due Date

(a) We must receive comments by April 8, 2010.

Affected ADs

(b) None.

Applicability

(c) This AD applies to The Boeing Company Model 767-200, -300, -300F, and -400ER series airplanes, certificated in any category; as identified in Boeing Service Bulletin 767-25-0477, dated August 27, 2009.

Subject

(d) Air Transport Association (ATA) of America Code 25: Equipment/Furnishings.

Unsafe Condition

(e) This AD results from reports of fault messages caused by improperly crimped hinge pin on the movable ceiling panel of entryway door on the forward left side coming into contact with wires and causing damage. The Federal Aviation Administration is issuing this AD to detect and correct improperly crimped hinge pins, which could damage tie rods and wire bundles, causing shorts in many systems, including the spar fuel shut off valve, oxygen mask deployment, and burned wires, which could be an ignition source in a hidden area of the airplane.

Compliance

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

Inspections and Corrective Actions

(g) Within 72 months after the effective date of this AD: Accomplish the inspections required by paragraphs (g)(1), (g)(2), (g)(3), and (g)(4) of this AD and do all applicable other specified and corrective actions, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 767-25-0477, dated August 27, 2009. Do all applicable other specified and corrective actions before further flight.

(1) A detailed inspection for pin migration at either end of the hinge assembly and to detect damage to the pin.

(2) A detailed inspection for correct crimp at both ends and to detect damage to hinge stock.

(3) A detailed inspection of the ceiling area for any visible cosmetic and tie-rod chafing that could be caused by a migrated hinge pin.

(4) A detailed inspection for wire damage and breakage.

Alternative Methods of Compliance (AMOCs)

(h)(1) The Manager, Seattle Aircraft Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Send information to ATTN: Shannon Lennon, Aerospace Engineer, Cabin Safety and Environmental Systems Branch, ANM-150S, FAA, Seattle Aircraft Certification Office (ACO), 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone [phone]; fax [phone]. Or, e-mail information to [e-mail].

(2) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Before using any approved AMOC on any airplane to which the AMOC applies, notify your principal maintenance inspector (PMI) or principal avionics inspector (PAI), as appropriate, or lacking a principal inspector, your local Flight Standards District Office. The AMOC approval letter must specifically reference this AD.

Issued in Renton, Washington, on February 11, 2010.

Ali Bahrami,

Manager, Transport Airplane Directorate, Aircraft Certification Service.