AD 2005-01-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-100 | Airworthiness Directives; Boeing Model 747-100, -100B, -100B SUD, -200B, -200C, -200F, and -300 Series Airplanes; and Model 747SP and 747SR Series Airplanes; Equipped With Pratt & Whitney JT9D-3 and -7 (Except -70) Series Engines or General Electric CF6-50 Series Engines With Modified JT9D-7 Inboard Struts |
| engine | General Electric | CF6-50 Series | Airworthiness Directives; Boeing Model 747-100, -100B, -100B SUD, -200B, -200C, -200F, and -300 Series Airplanes; and Model 747SP and 747SR Series Airplanes; Equipped With Pratt & Whitney JT9D-3 and -7 (Except -70) Series Engines or General Electric CF6-50 Series Engines With Modified JT9D-7 Inboard Struts |
Unsafe Condition
Reports of cracking in the midspar web, which could result in the loss of the midspar assembly load path, and combined with the loss of the nacelle station 180 bulkhead load path, could lead to the separation of the engine from the airplane.
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Required Actions
Perform repetitive detailed inspections of the midspar web of the inboard and/or outboard struts for cracking, disbonding, or buckling; perform detailed inspections of the midspar stiffeners for any crack or fracture; conduct related investigative actions; and take any applicable corrective actions. Perform initial inspections within 18 months after the effective date, with subsequent inspections at intervals not to exceed 1,200 flight cycles.
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Compliance Time
Within 18 months after the effective date of this AD, with subsequent inspections at intervals not to exceed 1,200 flight cycles.
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Affected Aircraft
Boeing Model 747-100, -100B, -100B SUD, -200B, -200C, -200F, and -300 Series Airplanes; and Model 747SP and 747SR Series Airplanes, equipped with Pratt & Whitney JT9D-3 and -7 (Except -70) Series Engines or General Electric CF6-50 Series Engines With Modified JT9D-7 Inboard Struts, as listed in Boeing Alert Service Bulletin 747-54A2219, dated September 4, 2003.
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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