AD 2003-16-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747 | Airworthiness Directives; Boeing Model 747 Series Airplanes Equipped with Pratt & Whitney JT9D-3 or JT9D-7 Series Engines (except JT9D-70 Series Engines) |
| engine | Pratt & Whitney | JT9D-3 or JT9D-7 Series | Airworthiness Directives; Boeing Model 747 Series Airplanes Equipped with Pratt & Whitney JT9D-3 or JT9D-7 Series Engines (except JT9D-70 Series Engines) |
Unsafe Condition
Cracking or other damage to the upper or lower surface of the forward lower spar and loose or damaged fasteners, which could result in reduced structural capability of nacelle struts one through four, and possible separation of the strut and engine from the airplane during flight.
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Required Actions
Perform a detailed inspection of the upper surface of the forward lower spar to detect cracks, fretting damage, and any loose or damaged fasteners. If any damage is found, perform a detailed inspection of the lower surface of the forward lower spar prior to further flight. Replace loose or damaged fasteners and, if necessary, repair the forward lower spar. Repeat inspections as specified.
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Compliance Time
Within 500 flight cycles, but no sooner than 300 flight cycles, after modification of the strut in accordance with AD 95-10-16, or within 6 months after the effective date of this AD.
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Affected Aircraft
Boeing Model 747 series airplanes equipped with Pratt & Whitney JT9D-3 or JT9D-7 series engines (except JT9D-70 series engines), as listed in Boeing Alert Service Bulletin 747-54A2209, dated November 8, 2001.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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