Airworthiness Directive · Amendment 39-13754 · Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 and -145 Series Airplanes
Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 and -145 Series Airplanes
Model EMB-135 and -145 series airplanes, as listed in EMBRAER Service Bulletin 145-33-0032, Revision 01, dated April 27, 2004; and EMBRAER Service Bulletin 145LEG-33-0004, dated November 5, 2003; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain EMBRAER Model EMB-135 and -145 series airplanes, that requires replacing the electrical harness for the tail boom strobe light with a new, improved harness that has a built-in metallic overbraid, and performing an operational test following the replacement. This action is necessary to ensure that there is sufficient lightning bonding at the electrical harness for the tail boom strobe light, and to prevent the simultaneous failure of multiple avionics systems in the event of a lightning strike, which could result in reduced controllability of the airplane. This action is intended to address the identified unsafe condition.
To ensure that there is sufficient lightning bonding at the electrical harness for the tail boom strobe light, and to prevent the simultaneous failure of multiple avionics systems in the event of a lightning strike, which could result in reduced controllability of the airplane, accomplish the following:
(a) Within 5,000 flight hours or 30 months after the effective date of this AD, whichever occurs first: Replace the electrical harness of the tail boom strobe light with a new, improved harness that has a built-in metallic overbraid, and perform an operational test on the navigation lights and the anti-collision light after the replacement. Do the actions per the Accomplishment Instructions of the applicable service bulletin in paragraph (a)(1) or (a)(2) of this AD.
(1) EMBRAER Service Bulletin 145-33-0032, Revision 01, dated April 27, 2004 (for Model EMB-135 and -145 series airplanes, except Model EMB-135BJ series airplanes).
(2) EMBRAER Service Bulletin 145LEG-33-0004, dated November 5, 2003 (for Model EMB-135BJ series airplanes).
(b) Actions accomplished before the effective date of this AD per EMBRAER Service Bulletin 145-33-0032, dated November 5, 2003, are considered acceptable for compliance with the corresponding action specified in this AD.
(c) 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.
(d) Unless otherwise specified in this AD, the actions shall be done in accordance with EMBRAER Service Bulletin 145-33-0032, Revision 01, dated April 27, 2004; or EMBRAER Service Bulletin 145LEG-33-0004, dated November 5, 2003; as applicable. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Empresa Brasileira de Aeronautica S.A. (EMBRAER), P.O. Box 343—CEP 12.225, Sao Jose dos Campos—SP, Brazil. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.
Note 1: The subject of this AD is addressed in Brazilian airworthiness directive 2004-01-05, dated February 5, 2004.
