.+. Transport

Canada

Transports

Canada No.

CF-2010-13

Issue Dale

6 May 2010

TP 7245E

I 112

AIRWORTHINESS DIRECTIVE

Number:

Subject:

Effective:

CF-2010-13

Angle of Attack (AOA) transducers - Resolver Oil Contamination

15 June 2010

Applicability:

Compliance:

Background:

Corrective

Actions:

All Bombardier Inc. Model CL-60D-2C10, CL-60Q..2D15 and CL-60D-2024 aeroplanes

equipped with Thafes angle of attack transducers, Part Number C16258AA.

As indicated below, unless already accomplished.

The manufacturer has informed Transport Canada that a certain number of the resolver

stators, which were installed in the angle of attack (ADA) transducers, were not cleaned

correctly. This condition can degrade the ADA transducer performance at low

temperatures resulting in freezing of the ADA transducer resolver, which may provide

inaccurate AOA data to the Stall Protection System (SPS). If not corrected, this condition

can result in early or late activation of the stick shaker and/or stick pusher.

Within 750 hours air time from the effective date of this directive, verify the serial

numbers (SIN) of each of the AOA transducers part number (PIN) C16258AA installed on

the aeroplane in accordance with paragraph 1A of Bombardier Alert Service Bulletin

(ASS) A670SA-27-054, Revision A, dated 18 January 2010, or later revisions approved

by the Chief, Continuing Airworthiness, Transport Canada.

1. Jfthe SIN is not listed in paragraph 1.A. of the above-mentioned ASS or its approved

revision(s), no further action is required other than compliance with paragraph 4 of

this directive.

2. If the SIN is listed in paragraph 1.A. of the above-mentioned ASS or its approvedj

revision(s) and the SIN has a letter "CO,no further action is required other than

l compliance with paragraph 4 of this directive.

3. If the SIN is listed in paragraph 1.A. of the above-mentioned ASS or its approved

revisions and the SIN does not have a letter "C·, prior to further flight, replace the

AOA transducer(s) in accordance with the Accomplishment Instructions, paragraph 2,

Part C of the above mentioned ASS or its approved revision(s).

Note 1 Replacement AOA transducer(s) must be either outside of the affected SIN

identified in paragraph 1A of the above-mentioned ASS or its approved

revisions, or identified as having been tested by a letter "C" after the SIN.

Note 2: Verification of the SIN of the AOA transducer(s) may be accomplished

visually by verifying transducer SIN on the aeroplane or by reviewing the

maintenance records.

Pursu'fllio CAR 202.&1the feg;slere<l Owrlerof e Ca""dian al"",,~ .hall, ",Ihin ••,,,en days, rKltifythk Minister

m writing ol an~ cha",e 01h;S 01" her name or address.

To"'quesl' C#l.n~! ""aress, conlae!lhe CilillAvj.~on Communlc.~onB C.nlnt (AARC)

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I

I:~CF-2010-13 ~

4. As of the effeclive date of this directive, no replacement of AOA transdUCer(sj

PIN C 16258AA with SIN listed in paragraph 1.A. of the above-mentioned ASS or its

approved revision(s) are allowed to be installed on CL-60Q-.2C10, CL-600-2D15 o~

Cl~600~2D24 aeroplanes unless such transducers have been inspected by the

manufactUrer and identified with a letter "C" after the SIN.

Authorization: For Minister of Transport, Infrastructure and Communities

ORIGINAL SIGNED BY

Derek Ferguson

Chief, Continuing Airworthiness

Contact: Mr, Gordanko Jeremic, Continuing Airworthiness, Ottawa, telephone 613-952-4357,

facsimile 613-996-9178 or e-mail CAWWEBFeedback@tc.gc.ca or any Transport

Canada Centre.