AD 60-13-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | 188A | Airworthiness Directives; Lockheed Model 188 Airplanes |
| aircraft | Lockheed Martin Corporation | 188C | Airworthiness Directives; Lockheed Model 188 Airplanes |
Unsafe Condition
Failure of a fueling valve to close fully may subject the tank to high fuel pressure which could cause not only tank rupture but structural damage.
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Required Actions
Conduct a check of the fueling system at the start of each fueling operation. Conduct a second check of primary and secondary controls at specified fuel levels (8,000-10,000 lbs for outboard/extended inboard tanks; 4,500-6,500 lbs for standard inboard tanks). Correct any malfunctions before continuing fueling. Monitor the fueling panel during the entire operation.
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Compliance Time
commencing not later than 10 days after publication of this airworthiness directive in the Federal Register
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Affected Aircraft
Lockheed Model 188A and 188C airplanes not equipped with fuel tank pressure relief overflow valves.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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