Federal Register #2026-21863

FAA aircraft-safety directives for Boeing 737 fuel-seal inspections and Airbus A330 flight-control computer upgrades

The Federal Aviation Administration issued aircraft-safety directives affecting certain Boeing 737 and Airbus A330 airplanes. - Government buyer: U.S. Department of Transportation, Federal Aviation Administration (FAA). - OEMs named: The Boeing Company and Airbus SAS. - Boeing 737 safety actions: For certain 737-8, 737-9, and 737-8200 airplanes, inspect the engine fuel shutoff valve access-panel gasket or seal, perform a fluid leak test, and complete applicable repairs or replacements. Repeat testing until no leak is found. Procedures are referenced in Boeing Alert Requirements Bulletin 737-57A1358 RB. - Airbus A330 safety actions: For certain A330-941 airplanes, install an updated Flight Control Primary Computer (FCPC) standard, as applicable by replacing the FCPC or its onboard replaceable module (OBRM), or reprogramming the OBRM. Concurrent upgrades apply to the FCPC, flight management, guidance and envelope computer (FMGEC), flight warning computer (FWC), and electronic instrument system (EIS). Only serviceable FCPCs may be installed. - Quantities and procurement status: No quantities or purchase are specified; this is a safety regulation rather than a procurement opportunity. The Boeing directive is estimated to affect 433 U.S.-registered airplanes.

Description

The Federal Aviation Administration is adopting a new airworthiness directive for certain Boeing Model 737-8, 737-9, and 737-8200 airplanes. Depending on the airplane configuration, the directive requires inspection of the form-in-place gasket for correct sealant installation or inspection of the preformed seal for damage, a fluid leak test of the engine fuel shutoff valve access panel, and applicable corrective actions. The directive addresses a leak that could allow fuel to reach the engine exhaust nozzle and cause a fire on the ground. It is effective December 1, 2026.

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