AD 98-21-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Saab AB, Saab Aerosystems | SAAB 2000 | Airworthiness Directives; Saab Model SAAB 2000 Series Airplanes |
Unsafe Condition
Combined failure of the limitswitch and the feedback shaft in the nose wheel steering system (NWSS) servo unit could result in uncommanded nose wheel steering deflection and reduced controllability of the airplane on the ground during takeoff or landing.
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Required Actions
Perform a functional test of the NWSS limitswitch within 3 weeks after the effective date. If no malfunction is detected, repeat the test every 400 flight hours. If malfunction is detected, replace the limitswitch before further flight and repeat the test every 400 flight hours.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 3 weeks after the effective date of this AD. Subsequent tests must be done at intervals not to exceed 400 flight hours.
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Affected Aircraft
Saab Model SAAB 2000 series airplanes, serial numbers 004 through 063 inclusive.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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