TP 7245E

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AD Number: CF-2015-21

AIRWORTHINESS DIRECTIVE

This Airworthiness Directive (AD) is issued pursuant to Canadian 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 their 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 of compliance (AMOC) to ADs.

Number:

CF-2015-21

ATA:

27

Effective Date:

30 July 2015 

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 

control 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. 

Corrective Actions:

Part 1 – Initial Detailed Visual Inspection of Control Rod Assemblies P/N C2CF619A and 

CT2CF1021-1, the Elevator Actuating Lever on the Control Column and the Control Column 

Torque Tube

A. Perform 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 Bulletin (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-2015-21 2 of 3 

Component 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, from 

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. 

Continue 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, 

inspect IAW Part 1 of this AD. 

Continue 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

Within 120 days or 100 air time 

hours, whichever occurs first, from 

the effective date of this AD, 

inspect IAW Part 1 of this AD and 

continue IAW Part 2 of this AD. 

 Elevator Actuating 

Lever on the Control 

Column 

Control Column 

Torque Tube

N/A

Yes Part 1 of this AD is satisfied. 

Continue IAW Part 2 of this AD.

No

Within 120 days or 100 air time 

hours, whichever occurs first, from 

the effective date of this AD, 

inspect IAW Part 1 of this AD and 

continue IAW Part 2 of this AD. 

B. If corrosion, 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-2015-21 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 elevator actuating lever on the control column and control 

column torque tube)

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-limited 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. Replace 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 this

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. Part 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 2015 

Contact:

Yosha Mendis, Continuing Airworthiness, Ottawa, telephone 613-952-4357, facsimile 613-996-9178 or email AD-CN@tc.gc.ca or any Transport Canada Centre.