# .+. 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 

### 15June 

### 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 ofattacktransducers, 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). Ifnot corrected, this condition can result inearly or late activation ofthe stickshaker and/or stick pusher. Within 750 hours air time from the effective date of this directive, verify the serial numbers (SIN) ofeach ofthe 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 18January 2010, or later revisions approved bythe Chief, Continuing Airworthiness, Transport Canada. 1. Jfthe SIN is not listed in paragraph 1.A. ofthe 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 ofthis 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 theAccomplishment Instructions, paragraph 2, Part Cofthe above mentioned ASS or itsapproved 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 aletter "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 CAR202.&1the feg;slere<lOwrlerofe Ca""dian al"",,~ .hall, ",Ihin ••,,,endays, rKltify thkMinister mwritingol an~cha",e 01h;S 01" hername oraddress. To"'quesl' C#l.n~! ""aress, conlae!lheCilill Avj.~onCommunlc.~onBC.nlnt (AARC) 

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# CanadaI 

# I:~CF-2010-13 ~
4. As of the effeclive date of this directive, no replacement of AOA transdUCer(sj PIN C16258AA 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 ofTransport, 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.