Document ID: FAA-2016-9185-0001
Agency: faa
Document Type: Proposed Rule
Title: Airworthiness Directives: The Boeing Company Airplanes
Posted Date: 2016-10-04T04:00Z

[Federal Register Volume 81, Number 192 (Tuesday, October 4, 2016)]
[Proposed Rules]
[Pages 68371-68373]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2016-23936]

 ========================================================================
 Proposed Rules
                                                 Federal Register
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 This section of the FEDERAL REGISTER contains notices to the public of 
 the proposed issuance of rules and regulations. The purpose of these 
 notices is to give interested persons an opportunity to participate in 
 the rule making prior to the adoption of the final rules.
 
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 

  Federal Register / Vol. 81, No. 192 / Tuesday, October 4, 2016 / 
Proposed Rules  

[[Page 68371]]

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2016-9185; Directorate Identifier 2016-NM-077-AD]
RIN 2120-AA64

Airworthiness Directives; The Boeing Company Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: We propose to adopt a new airworthiness directive (AD) for all 
The Boeing Company Model 757-200, -200PF, and -200CB series airplanes. 
This proposed AD was prompted by an analysis of the cam support 
assemblies of the main cargo door which indicated that the existing 
maintenance program for the cam support assemblies is not adequate to 
reliably detect cracks before two adjacent cam support assemblies could 
fail. This proposed AD would require an inspection to determine part 
numbers, repetitive inspections to detect cracking of affected cam 
support assemblies of the main cargo door, and replacement if 
necessary. We are proposing this AD to detect and correct cracking of 
the cam support assemblies of the main cargo door, which could result 
in reduced structural integrity of the main cargo door and consequent 
rapid decompression of the airplane.

DATES: We must receive comments on this proposed AD by November 18, 
2016.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 
11.43 and 11.45, by any of the following methods:
     Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: 202-493-2251.
     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: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    For service information identified in this NPRM, contact Boeing 
Commercial Airplanes, Attention: Data & Services Management, P.O. Box 
3707, MC 2H-65, Seattle, WA 98124-2207; telephone: 206-544-5000, 
extension 1; fax: 206-766-5680; Internet: https://www.myboeingfleet.com. You may view this referenced service information 
at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., 
Renton, WA. For information on the availability of this material at the 
FAA, call 425-227-1221. It is also available on the internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2016-
9185.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2016-
9185; 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 (phone: 800-647-5527) is in the ADDRESSES section. Comments will 
be available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Chandra Ramdoss, Aerospace Engineer, 
Airframe Branch, ANM-120L, FAA, Los Angeles Aircraft Certification 
Office (ACO), 3960 Paramount Boulevard, Lakewood, CA 90712-4137; phone: 
562-627-5239; fax: 562-627-5210; email: chandraduth.ramdoss@faa.gov.

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposal. Send your comments to an address listed 
under the ADDRESSES section. Include ``Docket No. FAA-2016-9185; 
Directorate Identifier 2016-NM-077-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 have received an analysis of the cam support assemblies of the 
main cargo door which indicated that the existing maintenance program 
for the cam support assemblies is not adequate to reliably detect 
cracks before two adjacent cam support assemblies could fail on certain 
Boeing Model 757-200, -200PF, and -200CB series airplanes.
    The main cargo door is on the upper left side of the forward 
fuselage between body stations 480 and 620. The door is hinged on its 
upper edge and opens outward to a canopy or a fully open position. The 
main cargo door has eight cam support assemblies along the bottom of 
the door that support the latch cams. The door latch cams engage with 
latch pins on the fuselage and hold the door closed. The cam support 
assemblies of the main cargo door are subject to ground loads, flight 
loads, and cabin pressure loads.
    Cracking of the cam support assemblies of the main cargo door could 
result in reduced structural integrity of the main cargo door and 
consequent rapid decompression of the airplane.

Related Service Information Under 1 CFR Part 51

    We reviewed Boeing Alert Service Bulletin 757-52A0094, dated 
December 23, 2015. The service information describes procedures for 
doing an ultrasonic inspection of the cam support assemblies of the 
main cargo door, and replacement of the cam support assemblies. This 
service information is reasonably available because the interested 
parties have access to it through their normal course of business or by 
the means identified in the ADDRESSES section.

[[Page 68372]]

FAA's Determination

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

Proposed AD Requirements

    This proposed AD would require accomplishing the actions specified 
in the service information described previously, except as discussed 
under ``Differences Between this Proposed AD and the Service 
Information.'' For information on the procedures and compliance times, 
see this service information at http://www.regulations.gov by searching 
for and locating Docket No. FAA-2016-9185.

Differences Between This Proposed AD and the Service Information

    The effectivity of Boeing Alert Service Bulletin 757-52A0094, dated 
December 23, 2015, is limited to certain Model 757-200, -200PF, and -
200CB series airplanes. However, the applicability of this proposed AD 
includes all Model 757-200, -200PF, and -200CB series airplanes because 
all airplanes must be inspected to determine if affected cam support 
assemblies of the main cargo door are installed. For all airplanes 
affected by this AD, including those airplanes not listed in the 
effectivity of Boeing Alert Service Bulletin 757-52A0094, dated 
December 23, 2015, compliance with paragraph (h) of this AD must be 
done using Boeing Alert Service Bulletin 757-52A0094, dated December 
23, 2015. Therefore, an alternative method of compliance (AMOC) 
approval is not necessary for those airplanes if Boeing Alert Service 
Bulletin 757-52A0094, dated December 23, 2015, is used. This difference 
has been coordinated with Boeing.

Costs of Compliance

    We estimate that this proposed AD affects 212 airplanes of U.S. 
registry.
    We estimate the following costs to comply with this proposed AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                                 Cost on U.S.
             Action                    Labor cost         Parts cost      Cost per product        operators
----------------------------------------------------------------------------------------------------------------
Inspection......................  6 work-hours x $85               $0   $510 per inspection  $108,120 per
                                   per hour = $510                       cycle.               inspection cycle.
                                   per inspection
                                   cycle.
----------------------------------------------------------------------------------------------------------------

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

                                               On-Condition Costs
----------------------------------------------------------------------------------------------------------------
                                                                                                     Cost per
                    Action                                Labor cost               Parts cost        product
----------------------------------------------------------------------------------------------------------------
Replacement (per pair of cam support           60 work-hours x $85 per hour =          $15,298          $20,398
 assemblies).                                   $5,100.
----------------------------------------------------------------------------------------------------------------

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),
    (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.

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

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):

    The Boeing Company: Docket No. FAA-2016-9185; Directorate 
Identifier 2016-NM-077-AD.

(a) Comments Due Date

    We must receive comments by November 18, 2016.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to all The Boeing Company Model 757-200, -200PF, 
and -200CB series airplanes, certificated in any category.

[[Page 68373]]

(d) Subject

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

(e) Unsafe Condition

    This AD was prompted by an analysis of the cam support 
assemblies of the main cargo door which indicated that the existing 
maintenance program for the cam support assemblies is not adequate 
to reliably detect cracks before two adjacent cam support assemblies 
could fail. We are issuing this AD to detect and correct cracking of 
the cam support assemblies of the main cargo door, which could 
result in reduced structural integrity of the main cargo door and 
consequent rapid decompression of the airplane.

(f) Compliance

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

(g) Inspection To Determine Part Numbers

    At the later of the times specified in paragraphs (g)(1) and 
(g)(2) of this AD: Inspect the cam support assemblies of the main 
cargo door to determine whether part number (P/N) 69-23588-5, 69-
23588-6, 69-23588-7, 69-23588-8, 69-23588-9, or 69-23588-10 is 
installed. A review of airplane maintenance records is acceptable in 
lieu of this inspection if the part number(s) of the cam support 
assemblies of the main cargo door can be conclusively determined 
from that review.
    (1) Before the accumulation of 18,000 total flight cycles.
    (2) Within 2,743 flight cycles or 27 months after the effective 
date of this AD, whichever occurs later.

(h) Inspections and Corrective Actions

    If, during any inspection required by paragraph (g) of this AD, 
any cam support assembly of the main cargo door having P/N 69-23588-
5, 69-23588-6, 69-23588-7, 69-23588-8, 69-23588-9, or 69-23588-10 is 
determined to be installed: At the later of the times specified in 
paragraphs (g)(1) and (g)(2) of this AD, do an ultrasonic inspection 
to detect cracking of the affected cam support assemblies of the 
main cargo door; and do all applicable replacements; in accordance 
with the Accomplishment Instructions of Boeing Alert Service 
Bulletin 757-52A0094, dated December 23, 2015. Do all applicable 
replacements before further flight. Repeat the inspections 
thereafter at intervals not to exceed 6,000 flight cycles. 
Replacement of a cam support assembly of the main cargo door does 
not terminate the repetitive inspections required by this paragraph.

(i) Alternative Methods of Compliance (AMOCs)

    (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 paragraph (j)(1) of this AD. 
Information may be emailed to: 9-ANM-LAACO-AMOC-Requests@faa.gov.
    (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, modification, or alteration 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. To be approved, 
the repair method, modification deviation, or alteration deviation 
must meet the certification basis of the airplane, and the approval 
must specifically refer to this AD.
    (4) For service information that contains steps that are labeled 
as Required for Compliance (RC), the provisions of paragraphs 
(i)(4)(i) and (i)(4)(ii) of this AD apply.
    (i) The steps labeled as RC, including substeps under an RC step 
and any figures identified in an RC step, must be done to comply 
with the AD. If a step or sub-step is labeled ``RC Exempt,'' then 
the RC requirement is removed from that step or sub-step. An AMOC is 
required for any deviations to RC steps, including substeps and 
identified figures.
    (ii) Steps not labeled as RC may be deviated from using accepted 
methods in accordance with the operator's maintenance or inspection 
program without obtaining approval of an AMOC, provided the RC 
steps, including substeps and identified figures, can still be done 
as specified, and the airplane can be put back in an airworthy 
condition.

(j) Related Information

    (1) For more information about this AD, contact Chandra Ramdoss, 
Aerospace Engineer, Airframe Branch, ANM-120L, FAA, Los Angeles ACO, 
3960 Paramount Boulevard, Lakewood, CA 90712-4137; phone: 562-627-
5239; fax: 562-627-5210; email: chandraduth.ramdoss@faa.gov.
    (2) For service information identified in this AD, contact 
Boeing Commercial Airplanes, Attention: Data & Services Management, 
P.O. Box 3707, MC 2H-65, Seattle, WA 98124-2207; telephone: 206-544-
5000, extension 1; fax: 206-766-5680; Internet: https://www.myboeingfleet.com. You may view this referenced service 
information at the FAA, Transport Airplane Directorate, 1601 Lind 
Avenue SW., Renton, WA. For information on the availability of this 
material at the FAA, call 425-227-1221.

    Issued in Renton, Washington, on September 27, 2016.
Dionne Palermo,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2016-23936 Filed 10-3-16; 8:45 am]
 BILLING CODE 4910-13-P