AD 47-42-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | C54-DC | Airworthiness Directives; DOUGLAS DC-4 and C-54 Aircraft |
| aircraft | The Boeing Company | C54A-DC | Airworthiness Directives; DOUGLAS DC-4 and C-54 Aircraft |
| aircraft | The Boeing Company | C54B-DC | Airworthiness Directives; DOUGLAS DC-4 and C-54 Aircraft |
| aircraft | The Boeing Company | C54D-DC | Airworthiness Directives; DOUGLAS DC-4 and C-54 Aircraft |
| aircraft | The Boeing Company | C54E-DC | Airworthiness Directives; DOUGLAS DC-4 and C-54 Aircraft |
| aircraft | The Boeing Company | C54G-DC | Airworthiness Directives; DOUGLAS DC-4 and C-54 Aircraft |
| aircraft | The Boeing Company | DC-4 | Airworthiness Directives; DOUGLAS DC-4 and C-54 Aircraft |
Unsafe Condition
The gust lock control could become engaged in flight or during taxiing, which could lead to improper rigging of the gust lock control system.
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Required Actions
Install latch assembly P/N 3356892 or 4356957 depending on handle length, rework gust lock handle link assembly by replacing spring and plunger with new bolt, and rework elevator, rudder, and aileron gust locks by replacing shaft with new piston. Ensure proper rigging after completion.
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Compliance Time
not later than April 1, 1948
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Affected Aircraft
The Boeing Company DC-4 and C-54 Aircraft models C54-DC, C54A-DC, C54B-DC, C54D-DC, C54E-DC, C54G-DC, and DC-4, including those with short or longer gust lock control handles.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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