AD 83-05-08 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | British Aerospace Regional Aircraft | H.P. 137 Jetstream Mk. 1 | Airworthiness Directives; BRITISH AEROSPACE, AIRCRAFT GROUP, SCOTTISH DIVISION Model HP.137 Jetstream MK-1 and Series 200 Airplanes |
| aircraft | British Aerospace Regional Aircraft | Jetstream Series 200 | Airworthiness Directives; BRITISH AEROSPACE, AIRCRAFT GROUP, SCOTTISH DIVISION Model HP.137 Jetstream MK-1 and Series 200 Airplanes |
Unsafe Condition
Defective fuel filter bleed pipe Non-Return-Valve (NRV) Part Number 702CD02 may fail to prevent fuel leakage, leading to potential fuel system malfunction.
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Required Actions
Inspect and test the fuel filter bleed pipe NRV P/N 702CD02 for correct operation per Scottish Aviation Limited Jetstream SB No. 18/3 Rev 1. Replace defective valves before further flight. Adjust inspection intervals up to 10% for maintenance coordination. Inspections are no longer required if Modification No. 5179 is installed.
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Compliance Time
Within the next 20 hours time-in-service after the effective date and thereafter at intervals not to exceed 200 hours time-in-service.
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Affected Aircraft
British Aerospace Aircraft Group Scottish Division Model HP.137 Jetstream MK-1 and Series 200 airplanes (all serial numbers)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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