AD 75-15-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Learjet Inc. | 23 | Airworthiness Directives; Gates Learjet Models 23, 24 and 25 Series Airplanes |
| aircraft | Learjet Inc. | 24 | Airworthiness Directives; Gates Learjet Models 23, 24 and 25 Series Airplanes |
| aircraft | Learjet Inc. | 24A | Airworthiness Directives; Gates Learjet Models 23, 24 and 25 Series Airplanes |
| aircraft | Learjet Inc. | 24B | Airworthiness Directives; Gates Learjet Models 23, 24 and 25 Series Airplanes |
| aircraft | Learjet Inc. | 24B-A | Airworthiness Directives; Gates Learjet Models 23, 24 and 25 Series Airplanes |
| aircraft | Learjet Inc. | 24C | Airworthiness Directives; Gates Learjet Models 23, 24 and 25 Series Airplanes |
| aircraft | Learjet Inc. | 24D | Airworthiness Directives; Gates Learjet Models 23, 24 and 25 Series Airplanes |
| aircraft | Learjet Inc. | 24D-A | Airworthiness Directives; Gates Learjet Models 23, 24 and 25 Series Airplanes |
| aircraft | Learjet Inc. | 24E | Airworthiness Directives; Gates Learjet Models 23, 24 and 25 Series Airplanes |
| aircraft | Learjet Inc. | 24F | Airworthiness Directives; Gates Learjet Models 23, 24 and 25 Series Airplanes |
Unsafe Condition
Flaws in the upper main landing gear struts could result in structural failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect left and right upper main landing gear struts using eddy current or ultrasonic methods within 600 hours' time in service after July 25, 1975, or by September 30, 1976. If flaws are found, remove flaws under 0.025 inches within 50 hours' time in service, reinspect, and treat. Replace or modify struts with flaws over 0.025 inches.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 600 hours' time in service after the effective date of this AD, but not later than September 30, 1976
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Gates Learjet Models 23 (Serial Numbers 23-003 thru 23-099); 24 (Serial Numbers 24-100 thru 24-297); and 25 (Serial Numbers 25-003 thru 25-182)
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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