Airworthiness Directive · Amendment 39-13734 · 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 120004, and 120006 through 120359 inclusive; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-120 series airplanes, that requires installing a lightning bonding jumper from the lower rotating beacon to the airframe. This action is necessary to prevent possible multiple avionics failures caused by a lightning strike, which could reduce the ability of the flightcrew to control the airplane. This action is intended to address the identified unsafe condition.
To prevent possible multiple avionics failures caused by a lightning strike, which could reduce the ability of the flightcrew to control the airplane, accomplish the following:
(a) Within 4,000 flight hours or 30 months after the effective date of this AD, whichever comes first: Install a lightning bonding jumper from the lower rotating beacon to the airframe in accordance with the Accomplishment Instructions of EMBRAER Service Bulletin 120-33-0037, dated November 5, 2003.
(b) In accordance with 14 CFR 39.19, the Manager, International Branch, ANM-116, FAA, Transport Airplane Directorate, is authorized to approve alternative methods of compliance for this AD.
