Transport Transports Canada Canada TP 7245E



# AIRWORTHINESS DIRECTIVE

The following airworthiness directive (AD) may be applicabl e 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 airworthi ness 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 i n 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 C anada, Ottawa, telephone 613 952

- 4357. 1 / 1 No

. CF
- 201 4 - 14 Issue Date 5 June 2014

Number: CF
- 201 4 - 14
ATA: 27 Type Certificate: A
- 27 Subject: Flight Controls
- Loose Horizontal Stabilizer Actuator ( Trim Jack) Mounting Block
Effective Date : 20 June 2014 Applicability: Viking Air Limited model DHC
- 3 aeroplane s , all serial numbers

. Com pliance: Within 100 hours air time or 90 days, whichever occurs first, from the effective date of this AD. Background: A h orizontal s tabilizer a ctuator ( t rim j ack) m ounting b lock, p art n umber C3FS79

- 5, was found loose in the forward

- aft and side

- to

- side d irections. The trim jack mounting block fastens the stabilizer actuator ( trim jack ) which allows the angle of incidence of the stabilizer to be varied. The stabilizer actuator ( trim jack ) also functions as the rear mounting point for the stabilizer.
Failur e of the mounting block through breakage or detachment may cause loss of control of the horizontal stabilizer and subsequent loss of control of the aeroplane

. Therefore, t his AD mandates a one

- time inspection of the stabilizer actuator (trim jack) mounting block

. Corrective Actions: Unless previously carried out per Viking Service Bulletin (SB) V3/0005 Revision A , dated 7 April 2014 , inspect the stabilizer actuator ( trim jack ) for discrepancy in accordance with the Accomplishment Instruction s of Viking SB V3/0005 , Revision A or later revision s approved by the Chief, Continuing Airworthiness, Transport Canada. If any movement is detected , prior to next flight, investigate the lower trim jack mounting block and mounting bracket in accordance with the Accompli shment Instruction s of the above

- noted SB and carry out the applicable rectification provided by Viking Air Limited

. Authorization: For the Minister of Transport , ORIGINAL SIGNED BY Derek Ferguson Chief, Continuing Airworthiness
Contact: Yosha Mendis , Continuing Airworthi ness, Ottawa, telephone 613

- 952

- 4357, facsimile 613

- 996

- 9178 or e

- mail AD

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

Pursuant to CAR 202.51 th e 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, O ttawa, Ontario K1A 0N8 , or 1 - 800 - 305 - 2059 , or www.tc.gc.ca/civilaviation/communications/centre/ address.asp
24

- 0022 (01

- 2005)