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-2013-05 Issue Date 22 February 2013

Number: CF-2013-05 Subject: Direct Current Power Center – Loss of Electrical Power Effective: 11 March 2013 Applicability: Bombardier Inc. aeroplane model BD-100-1A10, serial numbers 20003 and subsequent. Compliance: Within 800 hours air time or 24 months , whichever occurs first, from the effective date of this AD, unless already accomplished. Background: There have been multiple in-service reports of erratic electrical status indications on the Push Button Annunciators (PBA) and the E ngine Instrument & Crew Alerting System (EICAS) while on-ground and during flight. Thr ee of those reported incidents resulted in the aeroplane experiencing momentary loss of elec trical power and loss of flight displays. The investigation revealed that improper insert ion of a Printed Circuit Board (PCB) in a Direct Current Power Center (DCPC) may l ead to erroneous electrical status indications on the PBAs and EICAS. The erroneous indications could mislead the pilots into turning off active generators and leading to partial or complete loss of electrical power. Loss of electrical power could result in the loss of flight displays and reduced controllability of the aeroplane. Further investigation determined that the des ign of the existing DCPC covers does not ensure that the PCBs will remain inse rted into the motherboard of the DCPC. This AD mandates the modification of each DCPC to ensure that properly closed covers will retain the PCBs within the motherboards. Corrective Actions: Part I – DCPC Modification – Applicable to aeroplane serial numbers 20003 through 20405: Modify the DCPCs in accordance with t he Accomplishment Instructions in the Bombardier Service Bulletin (SB) 100-24-23, Basic Issue, dated 26 November 2012, or later revisions approved by the Chief, C ontinuing Airworthiness, Transport Canada. Part II – Spares – Applicable to aeroplane serial numbers 20003 and subsequent: As of the effective date of this AD, no person may install a DCPC with a part number listed in the table below, unless the DCPC seri al number has a suffix “R” beside the serial number:No. N ° CF-2013-05 2/2

970GC02Y04 975GC02Y04 320GC03Y04 970GC02Y05 975GC02Y05 320GC03Y05 970GC02Y06 975GC02Y06 320GC03Y06
Authorization: For the Minister of Transport, Infrastructure and Communities, 

### ORIGINAL SIGNED BY Derek Ferguson Chief, Continuing Airworthiness
Contact: Robert Farinas, Continuing Airworthine ss, Ottawa, telephone 613-952-4357, facsimile 613-996-9178 or e-mail ADs@tc.gc.ca or any Transport Canada Centre.