Airworthiness Directive · Amendment 39-12003 · 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, certificated in any category, as listed in EMBRAER Service Bulletin 120-53-0064, dated October 31, 1995.
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 installation of an additional drain at the fuselage aft section. This action is necessary to prevent mechanical blockage of the elevator control cables due to the freezing of water collected inside the fuselage between the rear pressure bulkhead and the fire wall of the auxiliary power unit. Such cable blockage could result in reduced controllability of the airplane. This action is intended to address the identified unsafe condition.
To prevent mechanical blockage of the elevator control cable due to the freezing of water collected inside the fuselage between the rear pressure bulkhead and the fire wall of the auxiliary power unit, which could result in reduced controllability of the airplane, accomplish the following:
(a) Within 1,200 flight hours after the effective date of this AD, install an additional drain at the fuselage aft section, in accordance with EMBRAER Service Bulletin 120-53-0064, dated October 31, 1995.
