Airworthiness Directive · Amendment 39-11958 · Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-120 Series Airplanes
Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-120 Series Airplanes
Model EMB-120 series airplanes, serial numbers 120003, 120004, 120006 through 120308 inclusive, 120310, 120312 through 120314 inclusive, 120316 through 120323 inclusive, and 120325 through 120330 inclusive; certificated in any category.
Note 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (b) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.
This amendment adopts a new airworthiness directive (AD), applicable to certain EMBRAER Model EMB-120 series airplanes, that requires replacement of the existing wire between certain circuit breakers with an improved wire. The actions specified by this AD are intended to prevent overheating of the wire between certain circuit breakers, which could result in smoke emissions in the cockpit. This action is intended to address the identified unsafe condition.
To prevent overheating of the wire between certain circuit breakers, which could result in smoke emissions in the cockpit, accomplish the following:
(a) At the next scheduled maintenance inspection (“A”-check), but no later than 400 flight hours after the effective date of this AD: Replace the existing wire between circuit breakers 0304 and 0358 with a wire coded W200-1063-12, in accordance with EMBRAER Service Bulletin 120-30-0028, dated August 25, 1997.
