AD 89-08-12 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 737-200 Series | Airworthiness Directives; BOEING Model 737-200, -300, and -400 Series Airplanes |
| aircraft | The Boeing Company | 737-300 Series | Airworthiness Directives; BOEING Model 737-200, -300, and -400 Series Airplanes |
| aircraft | The Boeing Company | 737-400 Series | Airworthiness Directives; BOEING Model 737-200, -300, and -400 Series Airplanes |
Unsafe Condition
The potential for dispatching an airplane with an inoperative fire/overheat system exists due to certain engine fire/overheat detection module part numbers (10-61096-41, -71, -81, -91, -92, or 10-62061-1, -2, -3, -11, or -12).
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Required Actions
Inspect the engine fire/overheat detection module to determine part number within 10 days after April 24, 1989. If specified part numbers are installed, add Engine Fire Detection System Test Procedure to AFM Limitations Section. Modify the detection module within 120 days after the effective date (February 12, 1990) per Boeing Service Bulletin 737-26-1063. Alternate compliance may be approved by FAA.
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Compliance Time
Within 10 days after April 24, 1989 and within 120 days after February 12, 1990
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Affected Aircraft
BOEING Model 737-200, -300, and -400 Series airplanes listed in Boeing Service Bulletin 737-26-1063 dated May 18, 1989.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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