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, DHC-2 to DHC-7

View LIST

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

For more information on digital technical publications, please contact technical.publications@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 81 - 100 of 1684

Bulletins RSS

Aircraftsort ascending S/B No. Title Original Issue Latest Issue
DHC-7 V7-33-01

DHC-7 - Fluorescent Light System Overheating - Ballast Replacement

Feb 28, 2008
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 7-32-47

Nose Landing Gear - Downlock Mechanism Improvement
- Modification 7/2243
(A/C 3 thru 112)

Aug 20, 1982
DHC-7 7-73-6

Fuel System - Inspection and Replacement of Fuel Tank Flapper Valve
(A/C with Flapper Valve Coded
Either G1, S1, R2, E2, P2, U2, B2, L2, I2, C2, M2, F2, G2, S2, R3, E3, P3, U3, B3 or C3)

Jan 20, 1984
DHC-7 7-21-28

Air Conditioning - Standardized Outflow Valves Aft Cabin - Pressure System
- Modification 712406
(A/C 1 thru 108)

Apr 4, 1986
DHC-7 7-30-7

Windscreen Washer - To Improve Washer Coverage
- Modification 7/1789
(A/C 1 thru 35 with S.O.O. 7039)

Feb 20, 1981
DHC-7 7-57-10

Wing Structure - Flight and Ground Spoilers Hinge Arms and Shroud Seals
-  Change of Seal Material
-  Modification 7/1376 (A/C 3 thru 27)

Nov 20, 1981
DHC-7 7-27-67

Flight Controls - Replacement Flight Spoiler Servo Actuator
- Modification 7/2285
(A/C 1 thru 112)

Nov 16, 1984
DHC-7 7-53-1

Front Fuselage - Provision for Static Port Tester
- Modification 7/1254
(A/C 1, 2 and 4)

Apr 14, 1978
DHC-7 7-25-60

Equipment/Furnishings - Wash Water System - Introduction of Additional Drain Valve
- Modification 7/2552
(A/C 1 thru 52 without Modification 7/1395)

Feb 23, 1990
DHC-7 7-34-16

VHF Navigation System - VOR 1 and VOR 2 Circuit Breaker Replacement
- Modification 7/2055
(A/C 1 thru 65 with S.O.O. 7003)

Mar 5, 1982 Jun 11, 1982 'A'
DHC-7 7-24-49

AC Electrical System - Voltage Suppressors and Relays Replacement
- Modification 7/2092 (A/C 1 thru 112)

Feb 25, 1983 Mar 22, 1985 'A'
DHC-7 7-32-63

Nose Landing Gear - Steering Actuator Anti-Rotation - Revised Arrangement
- Modification 7/2338
(A/C Serial Numbers 1 thru 86, 89, 91, 94 and 95)

Jan 20, 1984 Apr 3, 1987 'C'
DHC-7 7-77-2

Engine Instruments - To Revise Range Markings
- Modification 7/1304 (A/C 3, 4, 7 & 9)

Feb 2, 1979 Jan 23, 1981 'C'
DHC-7 7-22-14

Auto Flight - Addition of Manual Deselect Input to Automatic Pilot Disconnect Audible Alert Unit
- Modification 7/2591
(All A/C with S.O.O. 7186)

Dec 1, 1989
DHC-7 7-30-23

Ice and Rain Protection - Snow Separator Actuator - Introduction of Improved Actuator
- Modification 7/2422
(A/C 3 thru 112)

Aug 1, 1986 Sep 2, 1988 'A'
DHC-7 7-57-26

Wings - Upper Skin Structure at Outboard Nacelles - Installation of Repair Doubler
- DHC E.O. 73401
(A/C 1 and Sub.)
(CANCELLED)

Aug 30, 1985 Sep 27, 1985 'B'
DHC-7 7-27-83

Nacelles - Number 2 and Number 3 Flap Track Attachment brackets Replacement
- Modifications 7/2590 and 7/2592 All Aircraft

Mar 20, 1992 Jul 30, 1999 'A'
DHC-7 7-53-18

Fuselage Insulation - Removal in Rear Fuselage
- Modification 7/1784
(A/C 1 thru 26)

Apr 10, 1981
DHC-7 7-27-3

Flap Screwjacks - Introduction of Screw- jacks with Increased Torque Limiter Settings
- Modification 7/1299
(A/C 1, 2 and 4)

Jun 2, 1978

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