AD 2001-05-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747 | Airworthiness Directives; Boeing Model 747 Series Airplanes |
Unsafe Condition
Inadequate run-on torque of the primary retention nut of the midspar fuse pins of the inboard and outboard struts could result in loss of secondary retention capability, migration of the fuse pins, and consequent loss of the strut and engine from the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct repetitive detailed visual inspections to find discrepancies of the midspar fuse pin installation, including incorrect thread protrusion, incorrect gap between the fuse pin primary nut and secondary retention washer, and cracked or broken torque stripe. Follow-on actions include inspecting fuse pin threads, installing a new primary nut, replacing damaged fuse pins, and installing a torque stripe if necessary. Optional terminating modification is available.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 flight hours after the effective date of the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 747 series airplanes, as listed in Boeing Service Bulletin 747-54A2206, Revision 1, dated February 22, 2001, certificated in any category.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.