AD 81-13-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Learjet Inc. | 23 | Airworthiness Directives; Gates Model 23, 24, 25, 28 and 29 Series Airplanes |
| aircraft | Learjet Inc. | 24 | Airworthiness Directives; Gates Model 23, 24, 25, 28 and 29 Series Airplanes |
| aircraft | Learjet Inc. | 24A | Airworthiness Directives; Gates Model 23, 24, 25, 28 and 29 Series Airplanes |
| aircraft | Learjet Inc. | 24B | Airworthiness Directives; Gates Model 23, 24, 25, 28 and 29 Series Airplanes |
| aircraft | Learjet Inc. | 24B-A | Airworthiness Directives; Gates Model 23, 24, 25, 28 and 29 Series Airplanes |
| aircraft | Learjet Inc. | 24C | Airworthiness Directives; Gates Model 23, 24, 25, 28 and 29 Series Airplanes |
| aircraft | Learjet Inc. | 24D | Airworthiness Directives; Gates Model 23, 24, 25, 28 and 29 Series Airplanes |
| aircraft | Learjet Inc. | 24D-A | Airworthiness Directives; Gates Model 23, 24, 25, 28 and 29 Series Airplanes |
| aircraft | Learjet Inc. | 24E | Airworthiness Directives; Gates Model 23, 24, 25, 28 and 29 Series Airplanes |
| aircraft | Learjet Inc. | 24F | Airworthiness Directives; Gates Model 23, 24, 25, 28 and 29 Series Airplanes |
Unsafe Condition
Fuel starvation and engine flameout may occur due to fuel being trapped in the aft area of the wing tank outboard of the wheel well when prolonged nose up attitude of 10 degrees or more is maintained with 600 pounds or less fuel remaining in either wing tank.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Insert FAA-approved temporary changes to the Airplane Flight Manual (Figures I, II, III) or equivalent approved by the Chief, Aircraft Certification Program Office. Operate the airplane according to the revised AFM instructions.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 50 hours time-in-service after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Gates Model 23 (SN 003-099), Model 24 Series (SN 003-357), Model 25 Series (SN 003-341 except 337), Model 28 (SN 001-005), Model 29 (SN 001-003), Model 35 Series (SN 001-415), and Model 36 Series (SN 001-047)
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.