Federal Register #2026-07808

FAA Directive: Inspection and Repair of Boeing 747-400 Oxygen Hoses and Wiring Harnesses (STC Aircraft)

This opportunity involves a new FAA airworthiness directive for Boeing 747-400 series airplanes modified by specific supplemental type certificates (STCs ST01676SE and ST01706SE): - Government Buyer: - Federal Aviation Administration (FAA), Department of Transportation - OEMs and Vendors: - The Boeing Company (aircraft OEM) - Israel Aerospace Industries Ltd. (STC and service bulletin provider) - Products/Services Requested: - Inspection and repair services for: - Crew oxygen bottle flexible hoses (Part Number: 964312) - Cargo loading system wiring harnesses (Part Number: W991430112) - Procedures must follow Israel Aerospace Industries Ltd. Service Bulletin 36635157 - Estimated 5 affected U.S.-registered aircraft - Unique or Notable Requirements: - Inspections must check for chafing, arcing damage, and verify a minimum 2-inch clearance between hoses and wiring harnesses - Any damage found must be repaired per FAA or Civil Aviation Authority of Israel approval - Compliance is required before further flight after directive effective date - The unsafe condition could result in fire or loss of crew oxygen supply - Place of Performance/Delivery: - FAA facilities in Westbury, NY and Des Moines, WA - Israel Aerospace Industries Ltd. at Ben Gurion International Airport, Israel (as STC/service bulletin provider) - No specific contract vehicle or administrative requirements are noted.

Description

The Federal Aviation Administration (FAA) is issuing a new airworthiness directive (AD) for The Boeing Company Model 747-400 series airplanes modified by certain supplemental type certificates (STCs). This AD was prompted by a report of a ruptured crew oxygen bottle flexible hose and arcing damage on an adjacent cargo loading system wiring harness. It requires a detailed inspection of the crew oxygen bottle flexible hoses and adjacent wire harnesses for chafing and arcing damage, ensuring a minimum clearance between the hoses and wiring harnesses, and applicable repairs. The AD aims to address the unsafe condition to prevent fire and loss of crew oxygen supply.

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