Transport Transports Canada Canada TP 7245E



# AIRWORTHINESS DIRECTIVE

The following airworthiness directive (AD) may be applicable to an aircraft which our records indicate is registered in your na me. ADs are issued pursuant to Canadian Aviation Regulation (CAR) 521 Division X . Pursuant to CAR 605.84 and the further details of CAR Standard 625, Appendix H , the continuing airworthiness of a Canadian registered aircraft is contingent upon compliance with all applicable ADs. Failure to comply with the requirements of an AD may invalidate the flight authorization of the aircraft. Alternative means of compliance shall be applied for in accordance with CAR 605.84 and the above-referenced Standard

. This AD has been issued b y the Continuin g Airworthiness Division ( AARDG ) , National Aircraft Certification Branch, Trans p ort Canada, Ottawa, tele p hone 613 952-4357.

Pursuant to CAR 202.51 the registered owner of a Canadian aircraft shall, within seven days, notify the Minister in writing of any change of his or her name or address. To request a change of address, contact the Civil Aviation Communicat ions Centre (AARC) at Place de Ville, Ottawa, Ontario K1A 0N8 , or 1-800-305-2059 , or www.tc.gc.ca/civilaviation/communications/centre/ address.asp
2 4-0022 ( 01-2005 ) 1/2 No

. CF-2013-25 Issue Date 15 August 2013

Number: CF-2013-25 Subject: Emergency Locator Transmitter – Battery Wiring Installation Discrepancies Effective: 26 August 2013 Applicability: Honeywell ASCa Inc. Emergency Locator Transmitter (ELT) model RESCU 406AF and 406AFN with Transmitter Unit (TU) part numbers 1152682-1, -2 and -3 Note: These ELT TUs are known to be installed on, but not limited to the following aeroplane series/models and/or their variants: The Boeing Company: 717, 727, 737, 747, 757, 767, 777, 787, MD-11, MD-80 and MD-90 Lockheed Martin Corporation: 382 Airbus: A300, A310, A320, A321, A330, A340 and A380 ATR – GIE Avions de Transport Régional: ATR42 and ATR72 Dassault Aviation: Falcon 7X Compliance: Within 150 days from the effective date of this AD, unless already accomplished. Background: Following an event where a fire broke out on a parked and unoccupied aeroplane, the United Kingdom Air Accidents Investigation Branc h (AAIB) carried out an investigation to determine the cause of the fire. Although the investigation is still ongoing, preliminary information indicated that there was combusti on in the area of the ELT TU. Subsequent to the fire event, inspection of in-service ELT TUs revealed battery wiring installation discrepancies inside the TU that may result in an electrical short. The AAIB noted that in case of an electrical short, the ELT battery could provide the energy for an ignition. This AD is issued as a precautionary measur e to address the possibility of a fire due to wiring installation discrepancies of either t he ELT TU or the ELT Battery. Depending on the outcome of the AAIB investigation, Trans port Canada may revise this AD or mandate additional corrective actions. Corrective Actions: 1. Carry out a one-time inspection of the ELT TUs listed in the applicability section of this AD, and having serial numbers listed in the Effe ctivity section of Honeywell Alert Service Bulletin 1152682-23-A22, Revision 1, in accordance with the Accomplishment Instructions of Honeywell Alert Servic e Bulletin (ASB) 1152682-23-A22, Revision 1, dated 8 August 2013, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada. For TUs installed on aeroplanes, remove the TU prior to the inspection using instructions specifi ed by the aeroplane manufacturer or local airworthiness authority. 2. If any discrepancy is found during the inspection, carry out the applic able rectification in accordance with the Accomplishment Inst ructions of the above-noted ASB prior to returning the TU to service.No. N ° CF-2013-25 2/2
3. Reinstall any TU that has been removed from the aeroplane, using instructions specified by the aeroplane manufacturer or local airworthiness authority and perform any applicable return to service action in accor dance with the Accomplishment Instructions of the above-noted ASB. 4. Inspections and rectifications carried out in accordance with the Accomplishment Instructions of Revision 0 of the above-noted ASB prior to the effective date of this AD meet the requirements of paragraphs 1 to 3 of this AD. 5. Inspections and rectifications carried out in accordance with the following Boeing Multi Operator Messages prior to the effective dat e of this AD meet the requirements of paragraphs 1 to 3 of this AD.

Boeing Multi Operator Message Number MOM-MOM-13-0597-01B
MOM-MOM-13-0593-01B
MOM-MOM-13-0594-01B
MOM-MOM-13-0595-01B
MOM-MOM-13-0596-01B
MOM-MOM-13-0570-01B 6. As of the effective date of this AD, no per son shall follow the maintenance instructions of Honeywell Component Maintenance Manuals (CMM) that were published prior to those listed below, when carrying out battery replacements on ELT TUs listed in the applicability section of this AD.

Transmitter Unit part numbers Honeywell CMM Temporary Revision
1152682-1 23-24-01 Revision 8 23-1 1152682-2, -3 23-24-02 Revision 7 23-1 1152682-2 (installed on Boeing 787 only) 23-24-04 Revision 2 23-1

Authorization: For the Minister of Transport,

Philip Tang Acting Chief, Continuing Airworthiness Contact: Philip Tang, Continuing Airworthiness, Ottawa, telephone 613-952-4357, facsimile 613-996-9178 or e-mail AD-CN@tc.gc.ca or any Transport Canada Centre.