AD 48-48-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-6 | Airworthiness Directives; DOUGLAS All DC-6 Aircraft |
| aircraft | The Boeing Company | DC-6A | Airworthiness Directives; DOUGLAS All DC-6 Aircraft |
| aircraft | The Boeing Company | DC-6B | Airworthiness Directives; DOUGLAS All DC-6 Aircraft |
Unsafe Condition
Malfunctioning vacuum pumps or other vacuum pump system components can cause fire within the lines, burning through the hose connection into the engine compartment.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace Aeroquip Hose P/N 260-10WD-15 1/2 between oil separator and Pesco vacuum pump with Chicago Metal Hose Assembly No. 9273-1. Replace dural vacuum pump discharge line aft of the firewall with a steel line.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
as soon as practicable, but not later than May 1, 1949
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Affected Aircraft
Douglas DC-6, DC-6A, DC-6B aircraft not equipped with steel vacuum pump discharge lines aft of the firewall and Chicago Metal Hose assemblies from the oil separator to the Pesco pump.
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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