AD 87-08-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 757-200 Series | Airworthiness Directives; BOEING Model 757 Series Airplanes |
| aircraft | The Boeing Company | 757-200CB Series | Airworthiness Directives; BOEING Model 757 Series Airplanes |
| aircraft | The Boeing Company | 757-200PF Series | Airworthiness Directives; BOEING Model 757 Series Airplanes |
| aircraft | The Boeing Company | 757-300 Series | Airworthiness Directives; BOEING Model 757 Series Airplanes |
Unsafe Condition
Damage to the thermal blanket in the upper 45 degree section and lower section of the C-ducts and engine components, such as holes, splits, and tears, could compromise fire integrity.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect and repair, if necessary, the thermal blanket in the upper 45 degree section of the C-ducts within 250 flight hours after the effective date. Repair any damage to the upper thermal blanket prior to further flight. Inspect and repair, if necessary, the lower section thermal blanket and engine components within 250 flight hours.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 250 flight hours after the effective date of this AD
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Affected Aircraft
Boeing Model 757 series airplanes equipped with Rolls Royce RB211-535E4 engines, as listed in Boeing Service Bulletin 757-78-0010 dated December 23, 1986.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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