AD 89-03-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Embraer - Empresa Brasileira de Aeronautica S.A. | EMB-120 | EMPRESA BRASILEIRA DE AERONAUTICA, S.A. (EMBRAER) Model EMB-120 Series Airplanes |
| aircraft | Embraer - Empresa Brasileira de Aeronautica S.A. | EMB-120RT | EMPRESA BRASILEIRA DE AERONAUTICA, S.A. (EMBRAER) Model EMB-120 Series Airplanes |
Unsafe Condition
Loss of essential navigation systems due to loose self-locking nuts on No. 1 and No. 2 auxiliary generator control voltage sensor wires at relays K0035 and K0036.
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Required Actions
Install self-locking nuts P/N LN9161-05 on voltage sensor wires at relays K0035 and K0036, and install placard 120-47147-001 on the left-hand relay box cover stating specific instructions. Compliance must be within 25 hours time-in-service after the AD's effective date using Embraer Service Bulletin 120-024-0031.
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Compliance Time
Within the next 25 hours time-in-service after the effective date of this AD
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Affected Aircraft
EMBRAER Model EMB-120 series airplanes listed in Embraer Service Bulletin 120-024-0031 dated October 21, 1988, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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