AD 96-19-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Learjet Inc. | 35 | Airworthiness Directives; Gates Learjet Model 35 and 36 Series Airplanes Modified by Raisbeck Supplemental Type Certificate (STC) SA766NW |
| aircraft | Learjet Inc. | 35A (C-21A) | Airworthiness Directives; Gates Learjet Model 35 and 36 Series Airplanes Modified by Raisbeck Supplemental Type Certificate (STC) SA766NW |
| aircraft | Learjet Inc. | 36 | Airworthiness Directives; Gates Learjet Model 35 and 36 Series Airplanes Modified by Raisbeck Supplemental Type Certificate (STC) SA766NW |
| aircraft | Learjet Inc. | 36A | Airworthiness Directives; Gates Learjet Model 35 and 36 Series Airplanes Modified by Raisbeck Supplemental Type Certificate (STC) SA766NW |
Unsafe Condition
Aileron buffet or buzz during high speed cruise can result in deterioration of the aircraft lateral control system characteristics to an unacceptable level.
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Required Actions
Permanently reduce the airplane's maximum operating Mach limit (MMO) by recalibrating the Mach overspeed warning switch and airspeed indicators, revising the AFM Supplement, and making a maintenance log entry. Alternatively, remove the Raisbeck STC SA766NW modifications.
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Compliance Time
Within 200 hours time-in-service after the effective date of this AD, or within 6 months after the effective date of this AD, whichever occurs first
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Affected Aircraft
Gates Learjet Model 35, 35A, 36, and 36A series airplanes modified by Raisbeck STC SA766NW, excluding serial numbers listed in Table 1 of the AD.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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