AD 86-05-05 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Learjet Inc. | 23 | Airworthiness Directives; Gates Learjet Models 23 series, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 35,35A, 36 and 36A Series Airplane |
| aircraft | Learjet Inc. | 24 | Airworthiness Directives; Gates Learjet Models 23 series, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 35,35A, 36 and 36A Series Airplane |
| aircraft | Learjet Inc. | 24A | Airworthiness Directives; Gates Learjet Models 23 series, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 35,35A, 36 and 36A Series Airplane |
| aircraft | Learjet Inc. | 24B | Airworthiness Directives; Gates Learjet Models 23 series, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 35,35A, 36 and 36A Series Airplane |
| aircraft | Learjet Inc. | 24B-A | Airworthiness Directives; Gates Learjet Models 23 series, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 35,35A, 36 and 36A Series Airplane |
| aircraft | Learjet Inc. | 24C | Airworthiness Directives; Gates Learjet Models 23 series, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 35,35A, 36 and 36A Series Airplane |
| aircraft | Learjet Inc. | 24D | Airworthiness Directives; Gates Learjet Models 23 series, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 35,35A, 36 and 36A Series Airplane |
| aircraft | Learjet Inc. | 24D-A | Airworthiness Directives; Gates Learjet Models 23 series, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 35,35A, 36 and 36A Series Airplane |
| aircraft | Learjet Inc. | 24E | Airworthiness Directives; Gates Learjet Models 23 series, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 35,35A, 36 and 36A Series Airplane |
| aircraft | Learjet Inc. | 24F | Airworthiness Directives; Gates Learjet Models 23 series, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 35,35A, 36 and 36A Series Airplane |
Unsafe Condition
The potential for a fire and explosion within the battery caused by leaking fuel entering the battery vent.
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Required Actions
Relocate the battery inlet vent in accordance with specified Gates Learjet Corporation Service Bulletins. Special flight permits may be issued under FAR 21.197 and 21.199 to operate to a base for compliance. Alternate means or compliance time adjustments may be approved by the Manager, Wichita Aircraft Certification Office.
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Compliance Time
within the next 200 flight hours
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Affected Aircraft
Gates Learjet Models 23 series (003-099), 24/24A/24B/24B-A/24C/24D/24D-A/24E/24F/24F-A (100-357), 25/25A/25B/25C/25D/25F (003-061; 066-373), 28 (001-005), 29 (001-004), 35/35A (001-570; 589-600), 36/36A (001-053; 055) with a 'flow through' battery vent system having inlet on the bottom of the airplane.
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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