AD 48-09-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | C54-DC | Airworthiness Directives; DOUGLAS C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54A-DC | Airworthiness Directives; DOUGLAS C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54B-DC | Airworthiness Directives; DOUGLAS C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54D-DC | Airworthiness Directives; DOUGLAS C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54E-DC | Airworthiness Directives; DOUGLAS C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54G-DC | Airworthiness Directives; DOUGLAS C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | DC-4 | Airworthiness Directives; DOUGLAS C-54 and DC-4 Aircraft |
Unsafe Condition
Failure to prohibit fuel transfer between tanks via the cross-feed system could lead to fuel imbalance and loss of aircraft control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a placard in the cockpit stating fuel cross-feed system should not be used for transferring fuel between tanks. Revise the FAA Approved Flight Manual to include proper fuel system operation procedures.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
not later than April 15, 1948
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
The Boeing Company C-54 and DC-4 aircraft models: C54-DC, C54A-DC, C54B-DC, C54D-DC, C54E-DC, C54G-DC, DC-4
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.