Wings - Fuse Pin of the Landing Gear Beam End Fitting - Replacement / Inspection
- Published
- Effective
- Deadline
- Replaces
- 2017-18-05
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must perform repetitive inspections and replacements of the fuse pins as specified in Boeing Alert Service Bulletin 747-57A2360, Revision 1. They must comply with the AD requirements starting January 26, 2023, including ultrasonic testing for cracks and applicable on-condition corrective actions. Operators should review the service bulletin and incorporate the inspection and replacement schedule into their maintenance programs promptly.
Summary
Airworthiness Directive 2022-24-15 is a final rule issued by the FAA addressing The Boeing Company Model 747 series airplanes, including 747-100 through 747-8 series. It mandates repetitive replacement and inspection of fuse pins at the wing landing gear beam end fitting to detect and prevent cracking or failure. This directive aims to ensure continued airworthiness and safety of these aircraft by mitigating risks associated with broken fuse pins.
What changed
This AD supersedes AD 2017-18-05 by expanding the applicability to include additional Boeing 747 models such as the 747-8F and 747-8 series. It introduces new repetitive ultrasonic testing inspections for fuse pin cracking and adds options for repetitive replacement of corrosion-resistant and steel alloy fuse pins. The AD retains previous inspection and replacement requirements while incorporating enhanced inspection techniques and broader applicability.
Why it matters
This directive is critical for aviation professionals because a broken fuse pin at the wing landing gear beam end fitting can lead to structural damage affecting flight control cables and hydraulic systems, potentially resulting in loss of airplane controllability. Operators and maintenance teams must comply to prevent unsafe conditions and ensure the structural integrity of the landing gear assembly. Compliance helps avoid costly repairs and enhances overall flight safety.
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