Opportunity
Federal Register #2026-13869
FAA Proposed Airworthiness Directive for Boeing 747-400 and 747-8 Series Fuel Tank Components
Buyer
Federal Aviation Administration (FAA), Department of Transportation
Posted
July 09, 2026
Respond By
August 25, 2026
Identifier
2026-13869
NAICS
336413
This opportunity concerns a proposed FAA Airworthiness Directive (AD) for Boeing 747-400 and 747-8 series airplanes to address potential safety issues in the horizontal stabilizer fuel tank transfer pump components. - Government Buyer: - Department of Transportation, Federal Aviation Administration (FAA), Aircraft Certification Service - OEM Highlight: - The Boeing Company is the primary OEM referenced - Products/Services Requested: - Repetitive inspections of transfer pump housing inlet check valves and motor impeller inlet adapters for damage - On-condition replacement of damaged transfer pump motor impellers, inlet check valves, or entire pump housings - Procedures and requirements are detailed in Boeing Alert Requirements Bulletin 747-28A2373 RB - Estimated affected fleet: 31 U.S. airplanes - No specific part numbers provided; actions are based on condition and compliance - Unique/Notable Requirements: - Removal of previous wear allowances for affected parts - Accelerated initial inspection timelines (within 1 year or 5,000 flight hours) - Repetitive inspection intervals not to exceed 20,000 flight hours - Only serviceable, inspected parts may be installed going forward - Estimated inspection cost: $1,530 per cycle per airplane; replacement parts may cost up to $20,000 each - The directive is an interim action and may be updated with further rulemaking
Description
The Federal Aviation Administration (FAA) proposes to supersede Airworthiness Directive (AD) 2023-07-09 for certain Boeing Model 747-400 and -8 series airplanes. The proposed AD requires repetitive inspections for damage of the transfer pump housing inlet check valves and transfer pump motor impeller inlet adapters for the horizontal stabilizer fuel tank, along with applicable on-condition actions. It also limits the installation of affected parts under certain conditions. Comments on the proposed AD are due by August 24, 2026.