AD 48-18-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 49-46 | LOCKHEED Model 49-46 Aircraft |
Unsafe Condition
Failure of the supercharger bearing thermocouple could result in unmonitored temperature of the rear supercharger universal coupling support bearing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a thermocouple on the cabin supercharger bevel gear housing and a direct reading indicator in the cockpit to monitor bearing temperatures.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
prior to September 19, 1947
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Lockheed Aircraft Corporation Model 49-46 Aircraft, serial numbers 1975 through 1980 and 2021 through 2088.
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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