FAA Revisits Boeing 757 Wiring Instructions to Fix Earlier Errors
Published Date: 11/3/2026
Proposed Rule
Summary
The FAA is updating safety rules for certain Boeing 757 airplanes to fix errors in previous instructions about wiring and relay fixes. This means some planes will need new parts installed, wiring changed, and tests done to keep flying safely. Owners must comment by December 18, 2026, and be ready for possible costs and work to avoid risks with the power transfer unit.
Analyzed Economic Effects
2 provisions identified: 0 benefits, 2 costs, 0 mixed.
Required wiring and relay fixes on Boeing 757s
If you operate certain Boeing 757-200, -200PF, -200CB, or -300 airplanes, you must install new relays and connectors, change specified wire bundles, and perform an operational test per Boeing Alert Requirements Bulletin 757-29A0071 RB, Revision 1, dated May 28, 2026. The FAA estimates the work takes up to 45 work-hours (at $85/hour = $3,825) plus $4,730 in parts, for a total estimated cost of $8,555 per airplane and up to $3,995,185 for the 467 U.S.-registered airplanes affected.
Possible small follow-up repairs from inspections
After the required inspections and operational test, some airplanes may need on-condition corrective work. The FAA lists examples: rerouting wire bundle W2514 (estimated 1 work-hour = $85) and installing a seal ring (estimated 1 work-hour = $85 plus $10 parts = $95). The agency did not estimate how many aircraft will need these follow-up actions.
Key Dates
Department and Agencies
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