AD Amdt-39-10981
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 737-100 | Airworthiness Directives; Boeing Model 737-100, -200, -300, -400, and -500 Series Airplanes |
Unsafe Condition
Damage to the horizontal stabilizer and engine flameout caused by ice formed from water drained inadvertently through a mispositioned selector valve during flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a placard warning cabin crew not to put the selector valve for the forward lavatory water supply in the 'DRAIN' position during flight. Alternatively, install an isolation valve in the drain line downstream of the selector valve to terminate the placard requirement.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
Boeing Model 737-100, -200, -300, -400, and -500 series airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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