AD 49-33-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-6 | Airworthiness Directives; DOUGLAS All Model DC-6 Airplanes |
| aircraft | The Boeing Company | DC-6A | Airworthiness Directives; DOUGLAS All Model DC-6 Airplanes |
| aircraft | The Boeing Company | DC-6B | Airworthiness Directives; DOUGLAS All Model DC-6 Airplanes |
Unsafe Condition
Hamilton Standard Model 43D60/6851A-O propeller blades may experience fatigue failure if operated beyond 3,500 hours without remachining and reshotpeening, or if they have damage affecting face or edge alignment.
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Required Actions
Do not operate propeller blades beyond 3,500 hours unless taper-bores are remachined and reshotpeened by the manufacturer. Withdraw blades with damage altering face or edge alignment from service until manufacturer's test program results.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
not later than September 10, 1949
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Affected Aircraft
Douglas All Model DC-6 Airplanes equipped with Hamilton Standard Model 43D60/6851A-O props
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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