AD 60-24-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | 188A | LOCKHEED Model 188 Aircraft |
| aircraft | Lockheed Martin Corporation | 188C | LOCKHEED Model 188 Aircraft |
Unsafe Condition
Possible over-pressurization of fuel tanks during refueling due to absence of pressure relief overflow valves.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install pressure relief overflow valves (Lockheed P/N 634114-7 or -9) in each fuel tank unless already accomplished, as per Lockheed Service Bulletin 188/SB-422.
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Compliance Time
within 5,000 hours' time in service after the effective date of this directive
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Affected Aircraft
Lockheed Model 188A and 188C aircraft, all serial numbers.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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