Airworthiness Directive · Amendment 39-22477 · Fuselage
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 747-8 and -8F series airplanes, certificated in any category, as identified in Boeing Alert Requirements Bulletin 747-53A2907 RB, dated March 3, 2022.
The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 747-8 and -8F series airplanes. This AD was prompted by reports of cracking in stringers and splice fittings located at stringer splices at multiple body stations. This AD requires an inspection of each free flange of the stringers at the stringer splice for the presence of radius fillers at fastener locations, an inspection for cracking of the stringers and stringer splice fittings at certain stringer splice locations, and applicable on-condition actions. 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 747-53A2907 RB, dated March 3, 2022, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 747-53A2907 RB, dated March 3, 2022.
Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 747-53A2907, dated March 3, 2022, which is referred to in Boeing Alert Requirements Bulletin 747-53A2907 RB, dated March 3, 2022.
(1) Where the Compliance Time columns of the tables in the “Compliance” paragraph of Boeing Alert Requirements Bulletin 747-53A2907 RB, dated March 3, 2022, use the phrase “the original issue date of Requirements Bulletin 747-53A2907 RB,” this AD requires using “the effective date of this AD.”
(2) Where Boeing Alert Requirements Bulletin 747-53A2907 RB, dated March 3, 2022, specifies contacting Boeing for repair instructions: This AD requires doing the repair using a method approved in accordance with the procedures specified in paragraph (i) of this AD.
(3) Where the Compliance Time columns of the tables in the “Compliance” paragraph of Boeing Alert Requirements Bulletin 747-53A2907 RB, dated March 3, 2022, use the phrase “Before 12,000 total flights cycles,” this AD requires using “Before 12,000 total flight cycles, or within 8 years after the date of issuance of the original certificate of airworthiness or the original export certificate of airworthiness, whichever occurs first.”
(4) Where the Compliance Time columns of the tables in the “Compliance” paragraph of Boeing Alert Requirements Bulletin 747-53A2907 RB, dated March 3, 2022, uses the phrase “Within 9,600 flight cycles after the last detailed inspection,” this AD requires using “Within 9,600 flight cycles or 8 years after the last detailed inspection, whichever occurs first.”
(5) Where the Compliance Time columns of the tables in the “Compliance” paragraph of Boeing Alert Requirements Bulletin 747-53A2907 RB, dated March 3, 2022, uses the phrase “Within 4,600 flight cycles after the last detailed inspection,” this AD requires using “Within 4,600 flight cycles or 8 years after the last detailed inspection, whichever occurs first.”
