Airworthiness Directive · Amendment 39-19642 · Fuselage
The Boeing Company Airplanes
(1) This AD applies to all The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes, certificated in any category.
(2) Installation of Supplemental Type Certificate (STC) ST01219SE does not affect the ability to accomplish the actions required by this AD. Therefore, for airplanes on which STC ST01219SE 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.
We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. This AD was prompted by reports of cracks caused by corrosion of the edge of the bore of the spot face and corrosion of the lug bore of certain side-strut support fitting lugs. This AD requires repetitive detailed inspections of the left and right side-strut support fitting lugs with bushings installed for any corrosion, any crack, or any severed lug; repetitive detailed and high frequency eddy current (HFEC) inspections of the left and right side-strut support fitting lugs with bushings removed for any corrosion or any crack; and applicable on-condition actions. We are issuing this AD to address the unsafe condition on these products.
For airplanes identified as Group 7 in Boeing Service Bulletin 737-53-1246, Revision 1, dated May 30, 2018: Within 120 days after the effective date of this AD, inspect the left and right side-strut support fitting lugs at BS 685 and do all applicable on-condition actions using a method approved in accordance with the procedures specified in paragraph (j) of this AD.
For airplanes identified as Groups 1 through 6 in Boeing Service Bulletin 737-53-1246, Revision 1, dated May 30, 2018, except as specified in paragraph (i) of this AD: At the applicable times specified in paragraph 1.E., “Compliance,” of Boeing Service Bulletin 737-53-1246, Revision 1, dated May 30, 2018, do all applicable actions identified as “RC” (required for compliance) in, and in accordance with, the Accomplishment Instructions of Boeing Service Bulletin 737-53-1246, Revision 1, dated May 30, 2018.
(1) For purposes of determining compliance with the requirements of this AD: Where Boeing Service Bulletin 737-53-1246, Revision 1, dated May 30, 2018, uses the phrase “the Revision 1 date of this service bulletin,” this AD requires using “the effective date of this AD.”
(2) Where Boeing Service Bulletin 737-53-1246, Revision 1, dated May 30, 2018, specifies contacting Boeing for repair instructions or for work instructions: This AD requires doing the repair or the work instructions and doing applicable on-condition actions using a method approved in accordance with the procedures specified in paragraph (j) of this AD.
