AD 98-11-31
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | British Aerospace Regional Aircraft | Jetstream Series 3101 | Airworthiness Directives; British Aerospace Jetstream Model 3101 Airplanes. |
Unsafe Condition
Failure of the autopilot elevator electric system relays for the up and down trim interlocks could result in uncommanded trim servo operation and possible loss of control of the airplane.
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Required Actions
Install two additional relays and associated wiring changes in the relay box under the right-hand crew seat in the cockpit, in accordance with Jetstream 3100/3200 Series Service Bulletin No. 22-JK 2628, Revision 2. This modification eliminates the 800-hour life limit requirement for the pitch-up and pitch-down relays.
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Compliance Time
within the next 12 calendar months after the effective date of this AD
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Affected Aircraft
Jetstream Model 3101 airplanes, all serial numbers, equipped with autopilot systems installed under Jetstream Aircraft Limited Modifications JM3027, 3243, 3352, or 3483.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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