AD 89-11-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 737-300 Series | Airworthiness Directives; BOEING Model 737-300 and -400 Series Airplanes |
| aircraft | The Boeing Company | 737-400 Series | Airworthiness Directives; BOEING Model 737-300 and -400 Series Airplanes |
Unsafe Condition
Ingestion of 'blue ice' into the engine and potential loss of an engine.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct a leak check of the forward lavatory service system within 200 hours time-in-service after the effective date, repeating every 200 hours. Leaks must be repaired prior to further flight, or the lavatory system must be drained and placarded inoperative. An alternate means of compliance may be approved by the FAA Manager.
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Compliance Time
Within 200 hours time-in-service after the effective date of this AD, with subsequent checks not exceeding 200 hours time-in-service.
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Affected Aircraft
Boeing Model 737-300 and -400 series airplanes, 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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