AD 48-11-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-6 | Airworthiness Directives; DOUGLAS DC-6 Aircraft |
| aircraft | The Boeing Company | DC-6A | Airworthiness Directives; DOUGLAS DC-6 Aircraft |
| aircraft | The Boeing Company | DC-6B | Airworthiness Directives; DOUGLAS DC-6 Aircraft |
Unsafe Condition
Failure of the cabin supercharger, cabin heating, or thermal deicing systems during class C operation could result in loss of pressurization, inadequate heating, or impaired deicing capability, compromising safe flight.
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Required Actions
Accomplish rework per Douglas Co. data including Service Bulletins DC-6 No. 258 and 257, incorporate low speed drive shaft per Drawing 5350684-C, and install oil pressure warning switches per SB DC-6 No. 13 where applicable.
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Compliance Time
prior to return to service in class C operation
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Affected Aircraft
Douglas DC-6, DC-6A, DC-6B aircraft with cabin supercharging, heating, and thermal deicing systems, as specified in the referenced Service Bulletins and Douglas Co. documentation.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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