DHC Technical Publications

* For CL technical publications, please visit: aerialfirefighter.vikingair.com/support/technical-publications

De Havilland Canada aircraft are recognized the world over for their reliability and longevity, and Viking is committed to keeping the fleet operational and in service for years to come. This commitment includes simplifying access to current versions of and revisions to Maintenance and Flight Manuals for DHC-2 Beaver through to DHC-7 Dash 7 aircraft. Viking has worked with Aircraft Technical Publishers (ATP) to provide up-to-date, digital versions of the technical libraries that are easily accessible and available by subscription.

Current Manual Status List for DHC & CL Aircrafts

Manual Status List – DHC-2 to DHC-7

Manual Status List - CL-215/215T/415/415MP

To obtain a subscription to a digital library, please contact ATP:

For more information on digital technical publications, please contact technical.support@vikingair.com.

Service Bulletins

* For CL service bulletins, please visit: aerialfirefighter.vikingair.com/support/technical-publications

The table below contains the full list of service bulletins that have been issued in relation to DHC-2 Beaver, DHC-3 Otter, DHC-6 Twin Otter and DHC-7 Dash 7 aircraft. This list is for reference purposes only. To purchase a subscription to a digital library, please contact Aircraft Technical Publishers. To obtain a copy of a particular service bulletin or for more information, please contact our Technical Publications Administrator.

Displaying 1541 - 1560 of 1691

Bulletins RSS

Aircraft S/B No. Title Original Issue Latest Issue
DHC-7 7-24-22

400 Hz Inverters - Deletion of Power Factor Correction Capacitors
- Modification 7/1690
(A/C 1 thru 27)

May 23, 1980
DHC-7 7-24-21

Avionics - V.H.F. Navigation System -  To Change Power Source for Excitation to Radio Magnetic Indicators
-  Modification 7/1678 (A/C 1 thru 19)

May 30, 1980
DHC-7 7-24-20

Electric - D.C. Generator Control Unit Replacement
- Modification 7/1759 (A/C 1 thru 24)

Jul 4, 1980
DHC-7 7-24-2

A.C. Generator - Introduction of Generator AE2132 MKII
- Modification 7/1342 (A/C 4)

May 5, 1978
DHC-7 7-24-19

Electrical System - AC Generator Control Switch Replacement
- Modification 7/1746
(A/C 1 thru 22, 24 and 25)

Jun 27, 1980 Jan 23, 1981 'A'
DHC-7 7-24-18

A.C. Generator Control Unit Replacement
- Modification 7/1777 (A/C 1 thru 22)

Aug 15, 1980
DHC-7 7-24-17

Proximity Switch Rework - To Prevent Ingress of Moisture
(A/C 1 and Sub. as required)

Sep 5, 1980
DHC-7 7-24-16

Electrical Harness - Main and Nose Landing Gear - To Improve Reliability
- Modification 7/1693 (A/C 1 thru 14)

Mar 7, 1980
DHC-7 7-24-15

Electrical System - External Power Overvoltage Protection
- Modification 7/1563
(A/C 1 thru 27)

Jan 25, 1980 Sep 19, 1980 'A'
DHC-7 7-24-14

Electrical System - To Provide Independent Control of Inner and Outer Landing Lights
- Modification 7/1335 (A/C 3 thru 27)

Jan 5, 1980
DHC-7 7-24-13

A.C. System 400 Hz - Paralleling Control Box - To Replace Modification 7/1689 (A/C 1 thru 14)

Oct 26, 1979 Oct 17, 1986 'B'
DHC-7 7-24-12

A.C. System 400 Hz - Paralleling Control Box - To Replace Modification 7/1658 (A/C 1 thru 14)

Sep 24, 1979
DHC-7 7-24-11

A.C. System - 400 Hz Inverter Failure Indication
(A/C 1 and Sub.)

Sep 12, 1979 May 20, 1980 'A'
DHC-7 7-24-10

A.C. System - 400 HZ Inverters Service Life (A/C 1 and Sub.)

Aug 13, 1979 May 20, 1980 'C'
DHC-7 7-24-1

A.C. Generator -- Introduction of Upgraded Generator AE2132 MK1
(A/C 4)

May 5, 1978
DHC-7 7-23-9

Communications - Audio Resistor Box Assembly Rework
- Modification 7/2028 (A/C 28 thru 45)

Dec 11, 1981 Feb 5, 1982 'A'
DHC-7 7-23-8

Communications - Audio Integrating System - System Check and Rectification to Improve Crew Oxygen Mask Microphone Function
- Modification 7/2188 (All A/C)

Dec 10, 1981 Jun 18, 1982 'A'
DHC-7 7-23-7

Communications - Improved to Cockpit Voice Recorder Tape Circuits
(All A/C with Sundstrand Voice Recorder Installed)

May 8, 1981
DHC-7 7-23-6

Cockpit Voice Recorder - To Eliminate Stray Erase Bias, Modify A3 Power Supply Board and Add Reflective Strips (A/C 1 and Sub. as required)

Jun 6, 1980
DHC-7 7-23-5

Cockpit Voice Recorder - Self-Test Mod. (A/C 1 and Sub. as required)

Jun 6, 1980

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