AD 99-07-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | British Aerospace Regional Aircraft | Jetstream 3201 | Airworthiness Directives; British Aerospace Jetstream Model 3201 Airplanes |
Unsafe Condition
Internal corrosion of the hydraulic components on airplanes where these components were exposed to water contamination, which could result in reduced or loss of control of the airplane.
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Required Actions
Replace the nose landing gear downlock actuator, flap actuator, steering selector valve, hydraulic reservoir, and emergency selector valve in accordance with Jetstream Alert Service Bulletin 29-A-JA 970940 (original or revision 1). The FAA highly recommends replacing the hydraulic fluid while these components are replaced.
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Compliance Time
Required at whichever occurs later: (1) Upon accumulating 8,000 landings or within 5 years since the last hydraulic system component replacement, whichever comes first; or (2) within 12 calendar months after May 10, 1999.
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Affected Aircraft
British Aerospace Regional Aircraft Jetstream Model 3201 airplanes with constructor numbers 841, 842, 844 through 848, 851, 853 through 855, 857, 859 through 862, and 864.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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