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Federal Register / Vol. 86, No. 101 / Thursday, May 27, 2021 / Rules and Regulations 2 Installation of Supplemental Type Certificate STC ST01920SE affects the ability to accomplish some of the actions required by this AD. Therefore, for airplanes on which STC ST01920SE is installed, a change in product alternative method of compliance AMOC approval may be necessary to comply with the requirements of 14 CFR 39.17.
d Subject Air Transport Association ATA of America Code 27, Flight Controls; 52, Doors;
53, Fuselage; 54, Nacelles/pylons; 55, Stabilizers; 57, Wings.
e Unsafe Condition This AD was prompted by a determination that new or more restrictive airworthiness limitations AWLs are necessary. The FAA
is issuing this AD to address inadequate AWL and damage tolerance rating DTR
values in the maintenance or inspection program that reduce the probability of detection for foreseeable fatigue cracking of structurally significant items SSIs. This condition, if not addressed, could result in the loss of limit load capability of an SSI as well as loss of continued safe flight and landing of the airplane.
f Compliance Comply with this AD within the compliance times specified, unless already done.

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g Maintenance or Inspection Program Revision Within 24 months after the effective date of this AD, revise the existing maintenance or inspection program, as applicable, to incorporate the information specified in Boeing 767200/300/300F/400ER
Airworthiness Limitations AWLs, D622T001901, dated July 2020; and Boeing 767200/300/300F/400ER Damage Tolerance Rating DTR Check Form Document, D622T001DTR, dated February 2020. Except as specified in paragraph h of this AD, the initial compliance time for doing the tasks is at the time specified in Boeing 767200/300/
300F/400ER Airworthiness Limitations AWLs, D622T001901, dated July 2020;
and Boeing 767200/300/300F/400ER
Damage Tolerance Rating DTR Check Form Document, D622T001DTR, dated February 2020; or within 24 months after the effective date of this AD; whichever occurs later.
h Exceptions 1 Where Boeing 767200/300/300F/
400ER Airworthiness Limitations AWLs, D622T001901, dated July 2020, specifies compliance times thresholds for wing tank sealant removal and ensuring sealant location limits are met, these actions must be accomplished within the compliance times specified in Boeing 767200/300/300F/
400ER Airworthiness Limitations AWLs, D622T001901, dated July 2020; or at or before the next accomplishment of the specific Maintenance Planning Document MPD task, but no later than 6 years after the effective date of this AD; whichever occurs later.
2 For any horizontal stabilizer pivot fitting lug SSI 5510I13A on which a lug
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bore oversize repair has been accomplished:
Within 24 months after the effective date of this AD, re-evaluate the repair and obtain revised inspection intervals, as applicable, in accordance with the procedures specified in paragraph l of this AD.
3 Where Boeing 767200/300/300F/
400ER Airworthiness Limitations AWLs, D622T001901, dated July 2020; and Boeing 767200/300/300F/400ER Damage Tolerance Rating DTR Check Form Document, D622T001DTR, dated February 2020;
specify to submit reports within 10 days, those reports may be submitted within 10
days after the airplane is returned to service.
4 For airplanes having line numbers identified in Boeing 767200/300/300F/
400ER Airworthiness LimitationsLine Number Specific, D622T001902, dated August 2020: Revising the existing maintenance or inspection program, as applicable, to incorporate the information specified in Boeing 767200/300/300F/
400ER Airworthiness LimitationsLine Number Specific, D622T001902, dated August 2020, is an acceptable method of compliance with paragraph g of this AD for the tasks specified in Boeing 767200/300/
300F/400ER Airworthiness Limitations Line Number Specific, D622T001902, dated August 2020, only. The initial compliance time for doing the tasks is at the time specified in Boeing 767200/300/300F/
400ER Airworthiness LimitationsLine Number Specific, D622T001902, dated August 2020; or within 24 months after the effective date of this AD; whichever occurs later. For all other tasks specified in the service information identified in paragraph g of this AD, the requirements of paragraph g of this AD remain fully applicable and must be complied with.
i No Alternative Actions or Intervals After the existing maintenance or inspection program has been revised as required by paragraph g of this AD, no alternative actions e.g., inspections or intervals may be used unless the actions or intervals are approved as an alternative method of compliance AMOC in accordance with the procedures specified in paragraph l of this AD.
j Terminating Action for AD 20141404
Accomplishing the actions required by this AD terminates all requirements of AD 2014
1404.
k Paperwork Reduction Act Burden Statement A federal agency may not conduct or sponsor, and a person is not required to respond to, nor shall a person be subject to a penalty for failure to comply with a collection of information subject to the requirements of the Paperwork Reduction Act unless that collection of information displays a current valid OMB Control Number. The OMB Control Number for this information collection is 21200056. Public reporting for this collection of information is estimated to be approximately 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection
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of information. All responses to this collection of information are mandatory.
Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Information Collection Clearance Officer, Federal Aviation Administration, 10101 Hillwood Parkway, Fort Worth, TX 761771524.
l Alternative Methods of Compliance AMOCs 1 The Manager, Seattle ACO Branch, 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 responsible Flight Standards Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph m of this AD. Information may be emailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov.
2 Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards 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 Company Organization Designation Authorization ODA that has been authorized by the Manager, Seattle ACO Branch, 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 AMOCs for repairs and alterations approved previously for AD 20031810, Amendment 3913301 68 FR 53503, September 11, 2003 AD 20031810, and AD 20141404 are approved as AMOCs for the corresponding actions specified in this AD. All other AMOCs for AD 20031810
and AD 20141404 are not approved as AMOCs for this AD.
5 Repairs done before the effective date of this AD that meet the conditions specified in paragraphs l5i through iii of this AD
are acceptable methods of compliance for the repaired area where the inspections of the baseline structure cannot be accomplished.
i The repair was approved under both 14
CFR 25.571 and 14 CFR 26.43d by The Boeing Company ODA that has been authorized by the Manager, Seattle ACO
Branch, FAA, to make those findings.
ii The repair approval provides an inspection program inspection threshold, method, and repetitive interval.
iii Operators revised their existing maintenance or inspection program, as applicable, to include the inspection program inspection threshold, method, and repetitive interval for the repair.
m Related Information For more information about this AD, contact Wayne Lockett, Aerospace Engineer, Airframe Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des Moines, WA
98198; phone and fax: 2062313524; email:
wayne.lockett@faa.gov.

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