AD 91-02-02
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
Cross connection of engine and cargo compartment fire extinguishing wiring and plumbing during maintenance could lead to failure of the fire extinguishing systems.
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Required Actions
Modify the engine and cargo compartment fire extinguishing system wiring and plumbing in accordance with Boeing Service Bulletin 757-26-0020. This modification terminates repetitive inspections and functional tests required by AD 89-03-51 for airplanes with line numbers 256 and subsequent.
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Compliance Time
within the next 48 months after the effective date of this AD
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Affected Aircraft
BOEING Model 757 series airplanes, certificated in any category, excluding line numbers 256 and subsequent which incorporated the modification in production.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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