AD 47-10-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 49-46 | LOCKHEED Model 49 |
Unsafe Condition
The existing restrictor valve (P/N 66404) in the main landing gear down line may fail, leading to potential loss of hydraulic pressure and subsequent landing gear malfunction.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the existing restrictor valve (P/N 66404) with a winterized type restrictor valve (LAC P/N 667489) in each main landing gear down line.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
prior to April 1, 1947
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Lockheed Aircraft Corporation Model 49, serial numbers 2021 to 2088, inclusive.
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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