AD 54-24-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 1049-54 | Airworthiness Directives; LOCKHEED Models 49, 149, 649, 749, and 1049 Aircraft. |
| aircraft | Lockheed Aircraft Corporation | 1049B-55 (Navy R7V-1) | Airworthiness Directives; LOCKHEED Models 49, 149, 649, 749, and 1049 Aircraft. |
| aircraft | Lockheed Aircraft Corporation | 1049C-55 | Airworthiness Directives; LOCKHEED Models 49, 149, 649, 749, and 1049 Aircraft. |
| aircraft | Lockheed Aircraft Corporation | 1049D-55 | Airworthiness Directives; LOCKHEED Models 49, 149, 649, 749, and 1049 Aircraft. |
| aircraft | Lockheed Aircraft Corporation | 1049E-55 | Airworthiness Directives; LOCKHEED Models 49, 149, 649, 749, and 1049 Aircraft. |
| aircraft | Lockheed Aircraft Corporation | 149-46 | Airworthiness Directives; LOCKHEED Models 49, 149, 649, 749, and 1049 Aircraft. |
| aircraft | Lockheed Aircraft Corporation | 49-46 | Airworthiness Directives; LOCKHEED Models 49, 149, 649, 749, and 1049 Aircraft. |
| aircraft | Lockheed Aircraft Corporation | 649-79 | Airworthiness Directives; LOCKHEED Models 49, 149, 649, 749, and 1049 Aircraft. |
| aircraft | Lockheed Aircraft Corporation | 649A-79 | Airworthiness Directives; LOCKHEED Models 49, 149, 649, 749, and 1049 Aircraft. |
| aircraft | Lockheed Aircraft Corporation | 749-79 | Airworthiness Directives; LOCKHEED Models 49, 149, 649, 749, and 1049 Aircraft. |
Unsafe Condition
Failures of Bendix No. 405308 main landing gear actuating cylinder assembly may result in flight hazards due to inability to actuate the landing gear.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the cylinders with Bendix designs incorporating a 3/16-inch radius in the barrel, or rework existing cylinders by providing a 3/32-inch relief radius at the barrel bore relief area and bottom of the barrel, spot-peen the radius area, and magnetically inspect the barrel internally and externally before and after rework. If the barrel is cracked, it must be scrapped.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
no later than the next regularly scheduled landing gear overhaul
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Affected Aircraft
Lockheed Models 49, 149, 649, 749, and 1049 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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