Airworthiness Directive · Amendment 39-22960 · Powerplant
The Boeing Company Airplanes
This AD applies to all The Boeing Company Model 737-600, -700, -700C, -800, -900, and -900ER series airplanes, certificated in any category.
The FAA is correcting an airworthiness directive (AD) that was published in the Federal Register. That AD applies to all The Boeing Company Model 737-600, -700, -700C, -800, -900, and -900ER series airplanes. As published, the service information referenced in certain paragraphs of the regulatory text is incorrect, and the dates specified in the "System Airworthiness Limitation No. 3--Fan Blade Out Conditions" text and "System Airworthiness Limitation No. 4--Engine Nacelle Maintenance Errors" text of figure 1 to paragraph (j) of the regulatory text are incorrect. This document corrects those errors. In all other respects, the original document remains the same.
Except as specified by paragraph (h) of this AD: At the applicable times specified in the “Compliance” paragraph of Boeing Special Attention Requirements Bulletin 737-71-1937 RB, Revision 1, dated June 27, 2024, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Special Attention Requirements Bulletin 737-71-1937 RB, Revision 1, dated June 27, 2024.
Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Special Attention Service Bulletin 737-71-1937, Revision 1, dated June 27, 2024, which is referred to in Boeing Special Attention Requirements Bulletin 737-71-1937 RB, Revision 1, dated June 27, 2024.
(1) Where the service information referenced in paragraph (g) of this AD specifies contacting Boeing or Collins Aerospace for repair instructions: This AD requires doing the repair before further flight using a method approved in accordance with the procedures specified in paragraph (k) of this AD.
(2) Where the Compliance Time columns of the tables in the “Compliance” paragraph of Boeing Special Attention Requirements Bulletin 737-71-1937 RB, Revision 1, dated June 27, 2024, refer to the original issue date of Requirements Bulletin 737-71-1937 RB, this AD requires using the effective date of this AD.
(3) Where System Airworthiness Limitation No. 4, as identified in Boeing Special Attention Requirements Bulletin 737-71-1937 RB, Revision 1, dated June 27, 2024, requires incorporation of solutions to address potential engine nacelle maintenance errors, solutions consist of a re-designed fan cowl latch and keeper and application of high visibility paint on the interior of the integrated drive generator (IDG) door.
(4) Where Collins Aerospace Service Bulletin 737NG-71-008 referenced in Boeing Special Attention Requirements Bulletin 737-71-1937 RB, Revision 1, dated June 27, 2024, specifies use of Bonderite M-CR 1200S Aero, 10P4-2NF primer, EC-117S converter, TR19 thinner, or T20 thinner, this AD also allows for equivalent material substitutes as specified in paragraph 2.C., “Material Necessary for Each Component,” of Collins Aerospace Service Bulletin 737NG-71-008 referenced in Boeing Special Attention Requirements Bulletin 737-71-1937 RB, Revision 1, dated June 27, 2024.
(5) Where Collins Service Bulletin 737NG-71-008 referenced in Boeing Special Attention Requirements Bulletin 737-71-1937 RB, Revision 1, dated June 27, 2024, states to apply primer “per Boeing document D6-1816,” this AD requires replacing that text with “per Boeing document D6-1816 or Boeing SOPM 20-41-02.”
(6) Where Boeing Special Attention Requirements Bulletin 737-71-1937 RB, Revision 1, dated June 27, 2024, requires (Option 1) (Action 3) to be accomplished after (Option 1) (Action 2), this AD allows these two actions to be accomplished concurrently.
(7) Where Collins Service Bulletin 737NG-71-008 referenced in Boeing Special Attention Requirements Bulletin 737-71-1937 RB, Revision 1, dated June 27, 2024, specifies to topcoat over the repair area to agree with the initial production topcoat, this AD also allows topcoat to match the surrounding topcoat.
After the existing maintenance or inspection program has been revised as required by paragraph (g) of this AD, no alternative actions may be used unless the actions are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (k) of this AD.
