AD 92-07-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | British Aerospace Regional Aircraft | H.P. 137 Jetstream Mk. 1 | Airworthiness Directives; BRITISH AEROSPACE HP 137 Mk1, Jetstream Models 200, 3101, and 3201 Airplanes |
| aircraft | British Aerospace Regional Aircraft | Jetstream 3201 | Airworthiness Directives; BRITISH AEROSPACE HP 137 Mk1, Jetstream Models 200, 3101, and 3201 Airplanes |
| aircraft | British Aerospace Regional Aircraft | Jetstream Series 200 | Airworthiness Directives; BRITISH AEROSPACE HP 137 Mk1, Jetstream Models 200, 3101, and 3201 Airplanes |
| aircraft | British Aerospace Regional Aircraft | Jetstream Series 3101 | Airworthiness Directives; BRITISH AEROSPACE HP 137 Mk1, Jetstream Models 200, 3101, and 3201 Airplanes |
Unsafe Condition
Landing gear or flap extension malfunction during operation of the emergency hydraulic system due to the detent ball catch and selector valve issues.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify the detent ball catch of the emergency gear and flap extension hydraulic system selector valve within 600 hours time-in-service after February 5, 1990. Subsequent modifications and torque checks must be done every 1,800 hours TIS, starting from either 1,600 hours TIS or 200 hours after April 30, 1992, whichever is later. Recondition the selector valve if excessive torque is found.
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 February 5, 1990, and subsequent intervals not to exceed 1,800 hours TIS starting from the later of 1,600 hours TIS or 200 hours TIS after April 30, 1992.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
British Aerospace Regional Aircraft HP 137 Mk1, Jetstream Models 200, 3101, and 3201 (all serial numbers).
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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