Airworthiness Directive · Amendment 39-19649 · Flight controls
The Boeing Company Airplanes
(1) This AD applies to The Boeing Company Model 737-700C, -800, and -900ER series airplanes, certificated in any category, as identified in Boeing Alert Requirements Bulletin 737-27A1312 RB, dated June 4, 2019.
(2) Installation of Supplemental Type Certificate (STC) ST00830SE does not affect the ability to accomplish the actions required by this AD. Therefore, for airplanes on which STC ST00830SE is installed, a “change in product” alternative method of compliance (AMOC) approval request is not necessary to comply with the requirements of 14 CFR 39.17.
The FAA is adopting an airworthiness directive (AD) for certain The Boeing Company Model 737-700C, -800, and -900ER series airplanes. This AD requires a maintenance records check to determine if any main slat track assembly has been removed, an inspection of the main slat track assemblies for a suspect lot number or a lot number that cannot be determined, and applicable on-condition actions. This AD was prompted by a report that certain main slat track assemblies were manufactured incorrectly and are affected by hydrogen embrittlement. The FAA is issuing this AD to address the unsafe condition on these products.
Except as specified by paragraph (h) of this AD: At the applicable times specified in the “Compliance” paragraph of Boeing Alert Requirements Bulletin 737-27A1312 RB, dated June 4, 2019, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 737-27A1312 RB, dated June 4, 2019.
Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 737-27A1312, dated June 4, 2019, which is referred to in Boeing Alert Requirements Bulletin 737-27A1312 RB, dated June 4, 2019.
(1) For purposes of determining compliance with the requirements of this AD: Where Boeing Alert Requirements Bulletin 737-27A1312 RB, dated June 4, 2019, uses the phrase “the original issue date of Requirements Bulletin 737-27A1312 RB,” this AD requires using “the effective date of this AD.”
(2) Boeing Alert Requirements Bulletin 737-27A1312 RB, dated June 4, 2019, specifies to report inspection results to Boeing within a certain compliance time. For this AD, the compliance time to report inspection results is at the applicable time specified in paragraph (h)(2)(i) or (h)(2)(ii) of this AD.
(i) If the inspection was done on or after the effective date of this AD: Submit the report within 3 days after the inspection.
(ii) If the inspection was done before the effective date of this AD: Submit the report within 3 days after the effective date of this AD.
(3) Boeing Alert Requirements Bulletin 737-27A1312 RB, dated June 4, 2019, specifies to ship affected parts to Boeing within a certain compliance time if, during the inspection, it has been determined that any main slat track assembly has a suspect lot number or has a lot number that cannot be determined. For this AD, the compliance time for shipping affected parts to Boeing is at the applicable time specified in paragraph (h)(3)(i) or (h)(3)(ii) of this AD.
(i) If the inspection was done on or after the effective date of this AD: Ship the affected part to Boeing within 30 days after removing the affected part.
(ii) If the inspection was done before the effective date of this AD: Ship the affected part to Boeing within 30 days after the effective date of this AD.
(4) Where “CONDITION 5” of Boeing Alert Requirements Bulletin 737-27A1312 RB, dated June 4, 2019, uses the phrase “suspect lot number cannot be determined,” or “suspect lot number that cannot be determined,” this AD requires using, “lot number cannot be determined,” or “lot number that cannot be determined;” respectively.
(5) Where flag note (a) of Figure 5, Figure 6, Figure 7, and Figure 8, of Boeing Alert Requirements Bulletin 737-27A1312 RB, dated June 4, 2019, specifies “Only required if the main slat track assembly has a suspect lot number,” this AD requires using, “Only required if the main slat track assembly has a suspect lot number or a lot number that cannot be determined.”
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 2120-0056. Public reporting for this collection of information is estimated to be approximately 1 hour per response, including the time for reviewing instructions, completing and reviewing the collection of information. All responses to this collection of information are mandatory. Comments concerning the accuracy of this burden and suggestions for reducing the burden should be directed to the FAA at: 800 Independence Ave. SW, Washington, DC 20591, Attn: Information Collection Clearance Officer, AES-200.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
