AD 98-21-28
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | British Aerospace Regional Aircraft | Jetstream Series 3101 | Airworthiness Directives; British Aerospace Jetstream Model 3101 Airplanes |
Unsafe Condition
Propeller-induced vibrations during icing encounters at low ambient temperatures could result in decreased performance of the de-icing system and possible loss of control of the airplane.
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Required Actions
Modify the propeller de-icing system by incorporating specified modifications from Jetstream Service Bulletin 30-JM 7453, Revision 2, including introducing revised circuits, dual brush block assemblies, slipring modifications, revised boots, and dual rate timers. Compliance may be adjusted with approved alternatives.
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Compliance Time
within the next 100 hours time-in-service (TIS) after the effective date of this AD
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Affected Aircraft
Jetstream Model 3101 airplanes, serial numbers 601 through 645
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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