AD Amdt-39-10284
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747 | Airworthiness Directives; Boeing Model 747 Series Airplanes Equipped with Pratt & Whitney JT9D-3 and -7 Series Engines |
| engine | Pratt & Whitney | JT9D-3 and -7 Series | Airworthiness Directives; Boeing Model 747 Series Airplanes Equipped with Pratt & Whitney JT9D-3 and -7 Series Engines |
Unsafe Condition
Fatigue cracking in the forward engine mount bulkhead and forward lower spar web adjacent to the existing inspection area could lead to failure of the forward engine mount bulkhead and engine separation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct repetitive inspections for discrepancies in the forward engine mount bulkhead and forward lower spar web, and perform corrective actions if necessary. For certain airplanes, perform a one-time inspection for stop drilled cracks on the exterior of the forward engine mount chord and replace it if necessary. Additional optional terminating actions for repetitive inspections are also added.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 747 series airplanes equipped with Pratt & Whitney JT9D-3 and -7 series engines, as specified by the AD's applicability section.
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
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