AD 2004-12-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Embraer | EMB-120 | Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-120 Series Airplanes |
Unsafe Condition
Excessive gaps in the anti-skid drive coupling clips for the hubcaps of the main landing gear (MLG), which could result in momentary loss of the normal braking system at low speeds, and reduced controllability of the airplane.
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Required Actions
Within 400 flight hours or 6 months after the effective date, perform a general visual inspection for cracks or damage/distortion of the anti-skid drive coupling clips, measure the 'G' (gap) and 'H' (height) dimensions, and take applicable corrective actions. Replace any coupling clips not previously replaced with new, improved parts within 800 flight hours or 12 months after the effective date. Repeat inspections and measurements at every wheel or wheel speed transducer change.
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Compliance Time
Within 400 flight hours or 6 months after the effective date for initial inspection and measurements; within 800 flight hours or 12 months after the effective date for replacement of coupling clips.
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Affected Aircraft
EMBRAER Model EMB-120 series airplanes with serial numbers 120003, 120004, and 120006 through 120359, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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