AD 80-07-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Learjet Inc. | 23 | Airworthiness Directives: GATES LEARJET Specified Models |
| aircraft | Learjet Inc. | 24 | Airworthiness Directives: GATES LEARJET Specified Models |
| aircraft | Learjet Inc. | 24A | Airworthiness Directives: GATES LEARJET Specified Models |
| aircraft | Learjet Inc. | 24B | Airworthiness Directives: GATES LEARJET Specified Models |
| aircraft | Learjet Inc. | 24B-A | Airworthiness Directives: GATES LEARJET Specified Models |
| aircraft | Learjet Inc. | 24C | Airworthiness Directives: GATES LEARJET Specified Models |
| aircraft | Learjet Inc. | 24D | Airworthiness Directives: GATES LEARJET Specified Models |
| aircraft | Learjet Inc. | 24D-A | Airworthiness Directives: GATES LEARJET Specified Models |
| aircraft | Learjet Inc. | 24E | Airworthiness Directives: GATES LEARJET Specified Models |
| aircraft | Learjet Inc. | 24F | Airworthiness Directives: GATES LEARJET Specified Models |
Unsafe Condition
The cabin main entrance upper door may fail to open during an emergency due to insufficient safety wiring and inadequate pivot bolt installation.
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Required Actions
Within 150 hours time-in-service after the effective date, modify the cabin main entrance upper door by drilling access holes, installing new mechanism pivot bolts drilled for safety wire, drilling safety wire holes in surrounding structure as applicable, and safety wiring the bolts per Gates Learjet Corporation AMK79-9. A special flight permit under FAR 21.197 is allowed to relocate the airplane for modification. Equivalent compliance must be approved by the FAA Wichita office.
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Compliance Time
within the next 150 hours time-in-service after the effective date of this Airworthiness Directive
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Affected Aircraft
Learjet Inc. Models 23 (23-003 through 23-099), 24 Series (24-100 through 24-357), 25 Series (25-003 through 25-291), 28 (28-001 through 28-005), 29 (29-001 and 29-002), 35 Series (35-001 through 35-274 and 35-278), and 36 Series (36-001 through 36-044)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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