AD 49-27-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | C54-DC | Airworthiness Directives; DOUGLAS All Models C54-DC and DC-4 Series Aircraft |
| aircraft | The Boeing Company | DC-4 | Airworthiness Directives; DOUGLAS All Models C54-DC and DC-4 Series Aircraft |
Unsafe Condition
The nose gear yoke end and fittings (P/N 5087950, 5087951, or 5180402) may have a poor radius fairing into the journal, leading to potential failure of the nose gear assembly.
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Required Actions
Inspect nose gear yoke and fittings for proper 1/2-inch radius fairing into the journal. Replace parts with poor radius immediately. Replace parts with good radius every 17,500 hours airplane operation time, extendable to 30,000 hours if shotpeened per Douglas recommendations. Rework unused parts with poor radius per Douglas guidelines. Rework bushing P/N 1087938 and ring P/N 2103390 with specified radii.
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Compliance Time
Prior to 5,000 hours total airplane time, or at next scheduled inspection at which necessary facilities are available, on airplanes with more than 5,000 hours total time.
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Affected Aircraft
The Boeing Company C54-DC and DC-4 Series Aircraft
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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