Boeing 737, 747, 757, 767 and 777 Aeroplanes - Maintenance Practices
- Published
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Owners and operators of Boeing 737, 747, 757, 767, and 777 airplanes should incorporate the revised AMM and SRM procedures once they are released. The FAA recommends timely adoption of these maintenance changes to effectively manage corrosion risks. Contact the FAA Seattle Aircraft Certification Office or Boeing for the planned release dates and further guidance.
Summary
The Special Airworthiness Information Bulletin SAIB: NM-17-10 is an FAA information bulletin addressing maintenance practices for Boeing 737, 747, 757, 767, and 777 airplanes. It focuses on procedural updates for detecting and managing corrosion damage in the aft fuselage area near the vacuum waste tanks. The bulletin highlights that while corrosion reports have been primarily on Model 777 airplanes, similar issues may affect the other listed Boeing models.
What changed
This bulletin introduces revised procedures in the aircraft maintenance manuals (AMMs) and structural repair manuals (SRMs) for the affected Boeing models. The revisions include steps for neutralizing vacuum waste, proper containment and cleaning of spills, inspection for corrosion, removal of corrosion, and re-application of protective coatings. These changes aim to improve detection and prevention of corrosion caused by acidic vacuum waste leakage.
Why it matters
This information is important for aviation professionals because corrosion in the aft fuselage can compromise structural integrity if left unaddressed. Operators and maintenance personnel need to adopt these updated procedures to prevent corrosion progression and ensure continued airworthiness. Implementing these practices helps maintain aircraft safety and reduces the risk of costly repairs or operational disruptions.
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