Airworthiness Directive · Amendment 39-18080 · Nacelles/pylons
Empresa Brasileira de Aeronautica S.A. (Embraer) Airplanes
This AD applies to Empresa Brasileira de Aeronautica S.A. (Embraer) Model EMB -135ER, -135KE, -135KL, -135LR, -145, -145ER, -145MR, -145LR, -145XR, -145MP, and -145EP airplanes, certificated in any category, all serial numbers.
We are adopting a new airworthiness directive (AD) for all Empresa Brasileira de Aeronautica S.A. (Embraer) Model EMB-135ER, - 135KE, -135KL, -135LR, -145, -145ER, -145MR, -145LR, -145XR, -145MP, and -145EP airplanes. This AD was prompted by a determination of the need to revise the airplane airworthiness limitations related to the pylon yokes I and II, and the skin panel of the windshield pillar. This AD requires revising the maintenance or inspection program, as applicable. We are issuing this AD to prevent fatigue cracking of various structural elements, which could affect the structural integrity of the airplane.
Within 60 days after the effective date of this AD: Revise the maintenance or inspection program, as applicable, by incorporating EMBRAER EMB145 Temporary Revision (TR) 15-3, dated August 26, 2013, to the Airworthiness Limitation Requirements of the EMBRAER EMB145 Maintenance Review Board Report MRB 145/1150; and EMBRAER EMB145 TR 15-4, dated August 26, 2013, to the Airworthiness Limitation Requirements of the EMBRAER EMB145 Maintenance Review Board Report MRB-145/1150; as applicable.
(1) The compliance times depend on the airplane model, and the pre-modification and post-modification conditions specified in EMBRAER EMB145 TR 15-3, dated August 26, 2013, to the Airworthiness Limitation Requirements of the EMBRAER EMB145 Maintenance Review Board Report MRB 145/1150; and EMBRAER EMB145 TR 15-4, dated August 26, 2013, to the Airworthiness Limitation Requirements of the EMBRAER Maintenance Review Board Report MRB-145/1150; as applicable.
(2) The initial compliance times for the tasks specified in EMBRAER EMB145 TR 15-3, dated August 26, 2013, to the Airworthiness Limitation Requirements of the EMBRAER EMB145 Maintenance Review Board Report MRB 145/1150; and EMBRAER EMB145 TR 15-4, dated August 26, 2013, to the Airworthiness Limitation Requirements of the EMBRAER Maintenance Review Board Report MRB-145/1150; as applicable; are at the applicable threshold compliance times specified in EMBRAER EMB145 TR 15-3, dated August 26, 2013; and EMBRAER EMB145 TR 15-4, dated August 26, 2013; or within 600 flight cycles after the effective date of this AD, whichever occurs later. For the purposes of this AD, the initial compliance times (identified as “Threshold” or “T” in the service information) are expressed in “total flight cycles.”
After accomplishment of the revision required by paragraph (g) of this AD, no alternative actions (e.g., inspections) or intervals may be used unless the actions or intervals are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (i)(1) of this AD.
