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 name. 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 by the Continuing Airworthiness Division (AARDG), National Aircraft Certification Branch, Transport Canada, Ottawa, telephone 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 Communications 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 

24-0022 (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 Engine Instrument & Crew Alerting System

(EICAS) while on-ground and during flight. Three of those reported incidents resulted in 

the aeroplane experiencing momentary loss of electrical power and loss of flight displays. 

The investigation revealed that improper insertion of a Printed Circuit Board (PCB) in a

Direct Current Power Center (DCPC) may lead 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 design of the existing DCPC covers does not 

ensure that the PCBs will remain inserted 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 the Accomplishment Instructions in the 

Bombardier Service Bulletin (SB) 100-24-23, Basic Issue, dated 26 November 2012, or 

later revisions approved by the Chief, Continuing 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 serial 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 Airworthiness, Ottawa, telephone 613-952-4357, facsimile 

613-996-9178 or e-mail ADs@tc.gc.ca or any Transport Canada Centre.