Transport Transports Canada Canada TP 7245E



# EMERGENCY **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 com pliance 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 Standar d

. This AD has been issued by the Continuing Airworthiness Division (AARDG), National Aircraft Certification Branch, Transport C anada, Ottawa, telephone 613 952

- 4357. 1 / 2 No

. CF

- 201 4

- 21 Issue Date 10 July 2014

Number: CF

- 201 4

- 21

ATA: 28 Type Certificate: A

- 131
Subject: Fuel

- Fuel L eak F rom the Auxiliary Power Unit Fuel Boost Pump E lectrical C onduit in the Right L anding L ight C ompartment

Effective Date : 10 July 2014
Applicability: Bombardier Inc. model CL−60 0−2B16 aeroplanes , s erial numbers 5906 , 5910 , 5912 , 5917 , 5919 to 5932 , 5934 , 5935 , 5939 , 5940 , 5942 and 5948

. Compliance: As indicated below, unless already accomplished.
Background: Bombardier In c

. has discovered fuel leakage in the auxiliary power uni t ( APU ) fuel Boost Pump (BP) canister connector cavity

. On some of those aeroplanes, l eakage was also noticed at the APU fuel BP electrical conduit connection in the right hand landing light compartme nt. The root cause of the subject fuel leak is indentifi ed to be the improper length of the female connector keyway located in the fuel BP canister, causing a shift o f the electrical harness and its seals

.
Available data indicates that on a hot day, due to the heat generated by t he taxi light and/or landing lig hts on the ground, temperature in the landing light compartment can reach the fuel auto ignition temperature

. Therefore
, presence of any fuel in the right hand landing light compartment is considered to be a safety hazard that warrants mitigating action.

I n order to help mitigate the potential safety hazard precipitated by any fuel leakage in the
r ight hand landing light compartment, Bombardier Inc. , has revised the Aircraft Flight Manual (AFM) through Temporary Revisions (TRs) 604 / 38 and 605 / 20 dated 16 Ju ne 2014 to restrict the operation of Taxi and Landing lights on the ground. Transport Canada issued Emergency AD CF

- 2014

- 1 7 to mandate i ncorporation of the above AFM TRs.

T o address the root cause of the subject fuel leakage from the APU fuel boost pump
ca nister wiring conduit, Bombardier Inc. issued Alert S ervice B ulletin ( A SB) A605

- 28

- 008 that require s periodic inspection for fuel leaks and eventual the replacement of the discrepant fuel BP canister connectors on affected aeroplanes

. The A SB has been revi sed to include an additional inspection of the new connector wiring for damage and t his AD is issued to mandate the compliance with A SB A605

- 28

- 008 Rev ision 2 requirements

.

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, Ontari o K1A 0N8 , or 1

- 800

- 305

- 2059
, or www.tc.gc.ca/civilaviation/communications/centre/ address.asp

24

- 0022 (01

- 2005)No. N ° CF

- 20 14

- 21 2 / 2

Corrective Actions: Part I

– Fuel Leak Chec k

Within 25 hours air time from t he effective date of this AD and at intervals not exceeding 8 hour s air time thereafter
, inspect the right hand landing lights compartment for any fuel leaks from the APU fuel BP conduit outlet in accordance with P art A requirements of Bombardier A SB A605

- 28

- 008
, Rev ision 2
, dated 9 July 2014
, or later revision s approved by the Chief, Continuing Airworthiness, Transport Canada.
,
Part II

– APU Fuel Boost Pump Canister C onnector R eplacement

Within 6 months or 150 hours air time , whichever occurs first, from the effective date of this AD
, inspect and replace the connector on the APU fuel BP canister in accordance with P art B instructions of Bombardier A SB A605

- 28

- 008
, Rev ision 2
, dated 9 July 2014
, or later revision s approved by the Chief, Continuing Airworthi ness, Transport Canada.
For aeroplanes that have new connectors installed in accordance with Part B instructions of Bombardier ASB A605

- 28

- 008 , Basic Issue, dated 21 April 2014
, inspect the connector wiring for the s erviceability, as per the part B r equire ment of ASB 605

- 28

- 008 R evision 2
, dated 9 July 2014.
Compliance with Part I I of this AD constitutes the terminating action for inspection requirements per Part I of this AD.
Compliance with A SB A605

- 28

- 008 Rev ision 1, meets the requirement of Part II of this AD

.
Authorization: For the Minister of Transport
,
ORIGINAL SIGNED BY
Derek Ferguson Chief, Continuing Airworthiness

Contact: A.K. Durrani , Continuing Airworthiness, Ottawa, telephone 613

- 952

- 4357, facsimile 613

- 996

- 9178 or e

- mail AD

- CN@tc.gc.ca or any Transport Canada Centre.