AD 2000-22-08
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
Deterioration and deformation of the mass-balance weights of the aileron, which could affect the surface balance of the aileron and result in loss of aileron control and consequent reduced controllability of the airplane.
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Required Actions
Measure the clearance between the aileron mass-balance weights and attach fittings for specific serial numbers within 150 flight hours after the effective date. If clearance is outside acceptable limits, replace the affected mass-balance weight with a new, improved one. Perform a one-time detailed visual inspection of the aileron mass-balance weights for all airplanes within 2,000 flight hours after the effective date to detect cavities, holes, or delamination. If detected, replace the affected mass-balance weight. If white powder is found, remove it.
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Compliance Time
Within 150 flight hours (for clearance measurement) and within 2,000 flight hours (for detailed visual inspection) after the effective date.
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Affected Aircraft
EMBRAER Model EMB-120 series airplanes, serial numbers 120-0001 through 120-0333 inclusive, 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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