AD 54-06-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-6 | Airworthiness Directives; DOUGLAS DC-6, DC-6A and DC-6B Series Aircraft |
| aircraft | The Boeing Company | DC-6A | Airworthiness Directives; DOUGLAS DC-6, DC-6A and DC-6B Series Aircraft |
| aircraft | The Boeing Company | DC-6B | Airworthiness Directives; DOUGLAS DC-6, DC-6A and DC-6B Series Aircraft |
Unsafe Condition
Possible inadvertent discharge of CO2 into cabin heater or hydraulic accessories compartment when discharging CO2 into a nacelle due to operation of cabin master depressurization control or closing of the control valve on early DC-6 aircraft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace spring P/N 201496 with heavier spring P/N 30568 in two Kidde 3/4-inch stop valves P/N 870003, reidentifying the reworked valve as P/N 871107.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
July 1, 1954, for DC-6A and DC-6B aircraft, and November 1, 1954, for DC-6 aircraft.
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Affected Aircraft
Douglas DC-6, DC-6A, and DC-6B Series 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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