AD 90-15-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 737-300 Series | Airworthiness Directives; BOEING Model 737-300 and 737-400 Series Airplanes |
| aircraft | The Boeing Company | 737-400 Series | Airworthiness Directives; BOEING Model 737-300 and 737-400 Series Airplanes |
Unsafe Condition
False engine fire and overheat warnings could result in unnecessary engine in-flight shutdowns and airplane diversions that unduly jeopardize continued safe operation of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify the engine fire and overheat detection system on each engine in accordance with Boeing Service Bulletin 737-26-1055, Revision 1, dated September 14, 1989. An alternate means of compliance or adjustment of the compliance time may be used when approved by the FAA.
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Compliance Time
within 18 months after the effective date of the AD unless previously accomplished
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Affected Aircraft
Model 737-300 and 737-400 series airplanes equipped with Kidde engine fire and overheat detection systems, as listed in Boeing Service Bulletin 737-26-1055, Revision 1, dated September 14, 1989.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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