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 1521 - 1540 of 1691

Bulletins RSS

Aircraft S/B No. Title Original Issue Latest Issue
DHC-7 7-24-40

Electrical Power - Lucas A.E. 2132 MK4 A.C. Generator - Introduction of New Rotor and Fan Assembly
(All DHC-7 A/C with Lucas A/C Generator A.E. 2132 MK4 Installed)

Feb 19, 1982
DHC-7 7-24-4

Powered Flight Control Shut-off Switches Replacement
- Modification 7/1301 (A/C 1, 2 and 4)

Jun 23, 1978
DHC-7 7-24-39

Electrical Power - D.C. Busbar Protection Unit ZA29702 - Lucas Aerospace Modification 5064CG (A/C 1 and Sub.)

Nov 13, 1981
DHC-7 7-24-38

Electrical Power - Generator Control Units U13866, U13866/1, U13866/2 and U13866/3 - Lucas Aerospace Modification 5474U (A/C 1 and Sub.)

Nov 13, 1981
DHC-7 7-24-37

Electrical System - Rework of Electrical Connectors 2824 P11 and P12 for Number One and Two Fuel Tank Dump Valve Air Solenoid Valves
- D.H. E.O. 77007
(A/C 54)

Nov 13, 1981
DHC-7 7-24-36

Bleed Air Caution Light - To Overcome Spurious Illumination
- Modification 7/1842 (A/C 1 thru 52)

Nov 6, 1981 Apr 22, 1983 'B'
DHC-7 7-24-35

Electrical System - Variable Frequency A.C. Power - Special Inspection of Cable Assembly (A/C 1 thru 68)

Oct 2, 1981
DHC-7 7-24-34

D.C. Generator Control Unit - Additional Ground Installation
- Modification 7/2000
(A/C 3 thru 65 with units U13866/2 or U13866/3)

Sep 11, 1981 Jun 18, 1982 'A'
DHC-7 7-24-33

Electrical System - To Introduce Lever Lock Switches for Master Control on A.C. Control Panel Assembly
- Modification 7/1896
(A/C 1 thru 52)

Sep 11, 1981
DHC-7 7-24-32

Electrical Power - Busbar Protection Unit ZA29702 - Lucas Aerospace Modifications 5409U and 545OU
All A/C with above unit Installed)

Mar 27, 1981
DHC-7 7-24-31

A.C. Generator Types AE2132 MK2, MK3 and MK4 - Examination of the Drive End Bearing Mounting Arrangement at Stipulated Intervals
(All A/C with Generators Type AE2132MK2, MK3, MK4 Installed)

Mar 27, 1981 Nov 13, 1981 'B'
DHC-7 7-24-30

Electrics - Addition of Pitot Heat Power Supply Indication
- S.O.O. 7084
(A/C 1 thru 38)

Feb 13, 1981 Mar 27, 1981 'A'
DHC-7 7-24-3

A.C. Generator - Interim Installation of Generator AE2132
- E.O. 70702
(A/C 4)

May 5, 1978
DHC-7 7-24-29

Electrics - Wirelocking of Thermal Switches for Cooling Fans
- Modification 7/1873 (A/C 1 thru 25)

Feb 13, 1981
DHC-7 7-24-28

A.C. Generator Type AE2132MK3 - To Introduce Increased Length Drive Shaft (A/C with A.C. Generators AE2132 MK3)

Jan 23, 1981
DHC-7 7-24-27

A.C. Electrical System - Voltage Suppressors Installation with Modification 7/1477
- Modification 7/1874
(A/C 1 thru 52)

Jan 9, 1981 Mar 5, 1982 'A'
DHC-7 7-24-26

A.C. Generator Type AE2132 MK3 and MK4 - Improved Fan Bush and Main Exciter Rotor (A/C with A.C. Generators AE2132 MK3 or MK4)

Oct 10, 1980
DHC-7 7-24-25

Airframe Deicing System - Distribution Valves Electrical Circuit Protection
- Modification 7/1879
(A/C 3 thru 30)

Oct 24, 1980 Feb 13, 1981 'A'
DHC-7 7-24-24

Addition of Diode to Outboard Roll Spoiler Solenoid Circuit
- Modification 7/1373 (A/C 15 thru 22)

Sep 12, 1980
DHC-7 7-24-23

Engine Fire Protection - To Introduce Electrical Short Discrimination
- Modification 7/1302
(A/C 3 thru 23)

Sep 19, 1980

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