AD 99-15-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | British Aerospace Regional Aircraft | H.P. 137 Jetstream Mk. 1 | Airworthiness Directives; British Aerospace HP137 Mk1, Jetstream Series 200, and Jetstream Models 3101 and 3201 Airplanes |
| aircraft | British Aerospace Regional Aircraft | Jetstream 3201 | Airworthiness Directives; British Aerospace HP137 Mk1, Jetstream Series 200, and Jetstream Models 3101 and 3201 Airplanes |
| aircraft | British Aerospace Regional Aircraft | Jetstream Series 200 | Airworthiness Directives; British Aerospace HP137 Mk1, Jetstream Series 200, and Jetstream Models 3101 and 3201 Airplanes |
| aircraft | British Aerospace Regional Aircraft | Jetstream Series 3101 | Airworthiness Directives; British Aerospace HP137 Mk1, Jetstream Series 200, and Jetstream Models 3101 and 3201 Airplanes |
Unsafe Condition
Wear in the nose landing gear steering selector differential could result in loss of control of the airplane during take-off, landing, or taxi operations.
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Required Actions
Remove the nose landing gear steering selector valve and install either a new valve or one that has been overhauled in accordance with the appropriate component maintenance manual. Compliance must be accomplished every 10,000 hours time-in-service on the valve.
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Compliance Time
Within 12 calendar months after the effective date (September 10, 1999) or upon accumulating 10,000 hours time-in-service on the valve, whichever occurs later.
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Affected Aircraft
British Aerospace HP137 Mk1, Jetstream Series 200, and Jetstream Models 3101 and 3201 airplanes, 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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