AD 48-18-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 49-46 | LOCKHEED Model 49-46 Aircraft |
Unsafe Condition
Cabin supercharger drive shafts may experience failure due to wear on the rear drive shaft universal joint, clutch end bearing, carbon oil seal, and overriding clutch, leading to potential oil seal damage and bearing failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect cabin supercharger drive shafts every 300 hours of operation per LAC SB-107. Overhaul rear drive shaft universal joint, clutch end bearing, carbon oil seal, and overriding clutch. Replace defective parts and clutch end bearing 111GE regardless of condition. Replace sheet-metal retainer (P/N 257643) with bronze retainer (P/N 299449).
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Compliance Time
every 300 hours of operation
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Affected Aircraft
Lockheed Aircraft Corporation Model 49-46 Aircraft
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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