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-2013-41

Issue Date 

 30 December 2013 

Number: CF-2013-41 

Subject: FIREEX Check Tee Fitting - Incorrect Assembly 

Effective: 13 January 2014 

Applicability: Bombardier Inc. model BD-700-1A10 and BD-700-1A11 aeroplanes, serial numbers 

9002 through 9500 and 9998. 

Compliance: Within 100 hours air time or 180 days, whichever occurs first, from the effective 

date of this AD, unless already accomplished. 

Background: A check tee fitting used in the aeroplane fire extinguishing (FIREEX) distribution lines, 

was discovered by another airframe manufacturer as being incorrectly assembled. 

A properly assembled check tee fitting normally contains one check ball, however the 

affected fitting contained two check balls. The FIREEX manufacturer advised Bombardier 

that this condition may be present on aeroplane models BD-700-1A10 and BD-700-1A11.

Testing has verified that incorrect installation of the additional check ball in the fitting 

reduces the flow rate of the extinguishing agent. There are three check tee fittings 

installed on the BD-700-1A10 and BD-700-1A11 aeroplanes, one for each engine and 

one for the auxiliary power unit. Faulty fittings will reduce fire extinguishing protection at 

the affected locations. 

Bombardier has issued several Alert Service Bulletins (ASBs) to identify, inspect and 

replace if required, all affected fittings. This AD mandates incorporation of the applicable 

Bombardier ASBs to rectify this problem. 

Corrective 

Actions: 

Part I - Serial Number Verification: 

Inspect and verify the serial number of the FIREEX check tee fitting, part number 

446651, in accordance with the Accomplishment Instructions of the applicable 

Bombardier ASB as shown in the table below: 

Aeroplane 

Model 

Applicable Alert Service Bulletins 

BD-700-1A10 A700-26-010 Basic Issue dated 18 April 2013, or later revision 

approved by the Chief, Continuing Airworthiness, Transport 

Canada, or A700-26-6002 Basic Issue dated 18 April 2013, or 

later revision approved by the Chief, Continuing Airworthiness, 

Transport Canada. 

BD-700-1A11 A700-1A11-26-003 Basic Issue dated 18 April 2013, or later 

revision approved by the Chief, Continuing Airworthiness, 

Transport Canada, or A700-26-5002 Basic Issue 

dated 18 April 2013, or later revision approved by the Chief, 

Continuing Airworthiness, Transport Canada. 
No.

N° CF-2013-41 2/2 

A. For aeroplanes that have identified a FIREEX check tee fitting part number 446651 

with a serial number listed in the following table, accomplish Part II of this AD.

Serial Numbers 

062 to 070 

117 to 133 

3728 to 3731 

3733 to 3760 

3762 to 3776 

B. For aeroplanes that have not identified a FIREEX check tee fitting part number 

446651 with a serial number listed in the above table, no further action is required by 

this AD.

Part II - Inspection and Replacement of the Check Tee Fitting 

Inspect the affected check tee fitting identified in Part I.A. of this AD, and replace if 

required, in accordance with the Accomplishment Instructions of the applicable 

Bombardier ASB as shown in the table below: 

Aeroplane 

Model 

Applicable Alert Service Bulletins 

BD-700-1A10 A700-26-010 Basic Issue dated 18 April 2013, or later revision 

approved by the Chief, Continuing Airworthiness, Transport 

Canada, or A700-26-6002 Basic Issue dated 18 April 2013, or 

later revision approved by the Chief, Continuing Airworthiness, 

Transport Canada. 

BD-700-1A11 A700-1A11-26-003 Basic Issue dated 18 April 2013, or later 

revision approved by the Chief, Continuing Airworthiness, 

Transport Canada, or A700-26-5002 Basic Issue 

dated 18 April 2013, or later revision approved by the Chief, 

Continuing Airworthiness, Transport Canada. 

Authorization: For the Minister of Transport, 

ORIGINAL SIGNED BY 

Robin Lau 

Acting Chief, Continuing Airworthiness 

Contact: Robin Lau, Continuing Airworthiness, Ottawa, telephone 613-952-4357, facsimile 

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