AD 90-25-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 737-100 Series | Airworthiness Directives; BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-200 Series | Airworthiness Directives; BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-200C Series | Airworthiness Directives; BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-300 Series | Airworthiness Directives; BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-400 Series | Airworthiness Directives; BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-500 Series | Airworthiness Directives; BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-600 Series | Airworthiness Directives; BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-700 Series | Airworthiness Directives; BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-800 Series | Airworthiness Directives; BOEING Model 737 Series Airplanes |
Unsafe Condition
Fire caused by the chafing of wire bundles on crew oxygen system tubing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect clearances between crew oxygen system tubing, APU power feeder wire bundle, and horizontal stabilizer trim control cables below the control cabin floor per Boeing Service Bulletin 737-35-1033. If inadequate clearance or damage exists, repair damage, replace tubing with modified tubing, and perform a leak check before further flight. If only inadequate clearance between tubing and wire bundle with no damage, install floating loop clamps and spacers per the Service Bulletin.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 3,000 hours time-in-service after the effective date of this AD
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Affected Aircraft
Model 737 series airplanes listed in Boeing Service Bulletin 737-35-1033 dated March 15, 1990, certificated in any category.
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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