TP 7245E

1 of 3

AD Number: CF

- 201 5- 21 

# AIRWORTHINESS DIRECT **IVE**

This Airworthiness Directive (AD) is issued pursuant to C anadian Aviation Regulation (CAR) 521.427. No person shall conduct a take

- off or permit a take

- off to be conducted in an aircraft that is in the ir legal custody and control

, unless the requirements of CAR 605.84 pertaining to ADs are met. Standard 625 - Aircraft Equipment and Maintenance Standards Appendix H provides information concerning alternative

means o f compliance (AMOC) to AD s.

Number:

CF

- 201 5- 21

ATA:

27 Effective D ate:

30 July 201 5 Type Certificate:

A

- 22 Subject : Flight Controls – Elevator Control System - Corrosion of the Elevator Control Rod and Elevator Actuating Lever on the Control Column Applicability: Viking Air Ltd. (formerly Bombardier Inc.) model DHC

- 2 Mk. I, DHC

- 2 Mk. II and DHC

- 2 Mk. III aeroplanes, all serial numbers Compliance: As indicated below, unless already accomplished Background: There have been a number of reports of corrosion and/or cracking at the elevator actuating lever on the contr ol column, in the elevator control rod assemblies, and at the rod end plug. Undetected corrosion and/or cracking of the elevator control rod assemblies or elevator actuating lever may lead to the failure of the components with consequent loss of aeroplane control.

Cor rective Actions:

Part 1 – Initial Detailed Visual Inspection of Control Rod Assemblies P/N C2CF619A and CT2CF1021 -1
, the E levator A ctuating Lever on the C ontrol C olumn and the C ontrol C olumn T orque T ube

A. P erform an initial detailed visual inspection for corrosion, cracking and/or other damages on the exterior of the elevator control rod assemblies

, the elevator actuating lever on the control column and on the control column torque tube in accordance with (IAW) Viking Air Ltd. Service Bu lletin (SB) V2/0005 Revision C, paragraph 1.D.1 or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada using the following schedule :CF

- 201 5- 21 2 of 3

C omponent Age of Assembly Previously Inspected IAW

SB V2/0005 revision NC, A

or

B? Action Required

Control Rod Assembly P/N C2CF619A 15 years or greater since new

or of unknown age Yes Part 1 of this AD is satisfied. Continue IAW Part 2 and 3 of this AD.

No Within 120 days or 100 air time hours, whichever occurs first , f rom the effective date of this AD: a) Inspect IAW with Part 1 of this AD and continue IAW Part 2 and 3 of this AD or b) Optionally

, replace the control rod assembly with P/N C2CF619A

- 11 rod assembly and continue IAW Part 2 of this AD.

Less than 15 years since new Yes Part 1 of this AD is satisfied

. C ontinue IAW Part 2 and 3 of this AD

.

No Within 120 days or 100 air time hours, whichever occurs first

, from the effective date of this AD, i nspect IAW Part 1 of this AD.

C ontinue IAW Part 2 and 3 of this AD

Control Rod Assembly P/N CT2CF1021 -1 N/A Yes Part 1 of this AD is satisfied

. Continue IAW Part 2 of this AD.

No W ithin 120 days or 100 air time hours, whichever occurs first

, from the effective date of this AD

, i nspect IAW Part 1 of this AD and

c ontin ue IAW Part 2 of this AD

.

E levator A ctuating Lever on the C ontrol C olumn

C ontrol C olumn T orque T ube N /A Yes Part 1 of this AD is satisfied

. Continue IAW Part 2 of this AD.

No W ithin 120 days or 100 air time hours, whichever occurs first , from the effective date of this AD, i nspect IAW Part 1 of this AD and

c ontinue IAW Part 2 of this AD.

B. If c orrosion, cracking or other damages are found on :
1. the P/N C2CF619A control rod assembly

, replace the rod assembly with P/N C2CF619A

- 11 rod assembly prior to next flight or contact Viking Air Ltd. for an approved repair and incorporate the repair prior to next flight.

2. the P/N CT2CF1021

- 1 control rod assembly, replace the rod assembly with P/N CT2CF1021 -1 rod assembly prior to next flight or contact Viking Air Ltd. for an approved repair and incorporate the repair prior to next flight.CF

- 201 5- 21 3 of 3

3. the elevator actuating lever and/or control column torque tube, contact Viking Air Ltd. for an approved repair and incorporate the repair prior to next flight.

Part 2 – Repetitive Inspection ( applicable to control rod assembly P/Ns C2CF619A
, C2CF619A

- 9, C2CF619A

- 11 and CT2CF1021 -1
, the e levator a ctuating lever on the c ontrol c olumn and c ontrol

c olumn t orque t ube ) Within 30 days from the effective date of this AD, incorporate the applicable repetitive inspection task into the Transport Canada approved maintenance schedule as follows:

A. For DHC

- 2 Mk. I

, Mk. II and Mk. III : DHC

- 2 Beaver Maintenance Manual, PSM 1 -2- 2, Appendix 2, Part 3, Item 20A. (Refer to Temporary Revision 2

- 38

. )

B. For DHC

- 2 Mk. III : DHC

- 2 Turbo Beaver Supplementary Maintenance Manual, PSM 1

- 2T

- 2, Part 4, Item 20 A. (Refer to Temporary Revision 2T -14.)

Part 3 – Service Life Limit of Control Rod Assemblies P/N C2CF619A

A. P/N C2CF619A control rod assemblies are life -l imited to 15 years and must be replaced with P/N C2CF619A

- 11 control rod assembly prior to exceeding the life limit except as authorized by Part 3, Paragraph B of this AD.

B. R eplace all P/N C2CF619A control rod assemblies 15 years or greater since new or of unknown age at the effective date of this AD with P/N C2CF619A

- 11 control rod assembly within one year from th is effective date of the AD

. C. From the effective date of this AD, no person shall install P/N C2CF619A or P/N C2CF619A

- 9 control rod assemblies as a replacement.

D. P art 3 of this AD does not constitute terminating action for the Part 2 repetitive inspection requirements.

Authorization: For the Minister of Transport,

ORIGINAL SIGNED BY

Rémy Knoerr Chief, Continuing Airworthiness Issued on 16 July 201 5

Contact:

Yosha Mendis , Continuing Airworthiness, Ottawa, telephone 613

- 952

- 4357, facsimile 613

- 996

- 9178 or e

mail AD -C N@tc.gc.ca or any Transport Canada Centre.