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 1561 - 1580 of 1691

Bulletins RSS

Aircraft S/B No. Title Original Issue Latest Issue
DHC-7 7-23-4

Passenger Address System - To Introduce Flight Compartment P.A. "IN USE" Indicator Light
- Modification 7/1348
(A/C 1 thru 12)

Apr 25, 1980
DHC-7 7-23-3

Passenger Address System - Alternate Power Source Under Emergency Conditions
- Modification 7/1434
(A/C 1 - 4, 6, 7, 9 and 10)

Jun 13, 1980
DHC-7 7-23-25

Communications - Rectification of Interphone Chime to Flight Deck Audio System
- Modification 7/2595 (A/C 1 and Sub.)

Jul 13, 1990
DHC-7 7-23-24

Communications - Flight Attendant's Emergency Mask Mic Installation Provisions - Modification 7/2581 (A/C 1 and Sub.)

Apr 7, 1989
DHC-7 7-23-23

Communications - Installation of a Standard VHF Antenna for Upper and Lower Locations
- Modification 7/2301
(A/C 3 thru 110 with S.O.O. 7002)

Feb 27, 1987
DHC-7 7-23-22

Communications - Flight Crew/Attendant Emergency Call Switch Replacement
- Modification 7/2492 (A/C 3 thru 123)

Oct 17, 1986
DHC-7 7-23-21

Communications - Cockpit Voice Recorder -  Change of Power Supply
-  Modification 7/2431
(A/C 3 thru 27 without Modification 7/1602 and A/C 28 and Sub. with Modification 7/1602)

Jan 24, 1986
DHC-7 7-23-20

Communications - Cockpit Voice Recorder
- Tape Deck Housing Connector Check and Replacement (The Cockpit Voice Recorder used in De Havilland Dash 7 A/C is Model AV-557B Part Number 980-6005-055)

Mar 9, 1984
DHC-7 7-23-2

Avionics - Voice Recorder Attenuation
- Modification 7/1311
(A/C 1, 2 and 4)

May 18, 1979
DHC-7 7-23-19

Communications - Attendant's Interphone System Call Light Rework
- Modification 7/1672 (A/C 1 thru 18)

Sep 16, 1983
DHC-7 7-23-18

Communications - HF System Receiver Exciter or Power Amplifier Coupler Replacement
- Modification 7/2218
(A/C 1 thru 132 with S.O.O. 7001) (HF Communication System)

Jun 17, 1983
DHC-7 7-23-17

Communications - Introduction of Diode to Flight Attendant's Panel Electrical Circuit
- Modification 7/2208 (A/C 1 thru 92)

Feb 25, 1983
DHC-7 7-23-16

Communications - Audio Control Panel -  Total Audio Recording Provision
-  Modification 7/2283
(All DHC-7 A/C with Cockpit Voice Recorder S.O.O. 7022 Installed)

Feb 4, 1983
DHC-7 7-23-15

Communications - Passenger Address System - Addition of P.A. Side Tone Flight Deck Headsets
- S.O.O. 7153
(A/C 3 and Sub. with S.O.O. 7026) (Forward Observer's Seat - Flight Compartment Installed)

Jan 24, 1983
DHC-7 7-23-14

Communications - Audio Integration System Noise Reduction
- Modification 7/2258 (A/C 3 thru 92)

Dec 22, 1982
DHC-7 7-23-13

Communications - Improved Mask Microphone
- Modification 7/2188
(A/C 1 thru 57, 59 thru 70 and 72 thru 76)

Jun 18, 1982
DHC-7 7-23-12

Communications - Addition of Interphone/ Transmitter Switch to Flight Compartment Right-Hand Sidewall
- Modification 7/1969
(A/C 1 thru 92 less 54, 62 and 66)

Mar 12, 1982 Jun 10, 1983 'B'
DHC-7 7-23-11

Communications - VHF Transceiver -  To Reduce Interference
-  Modifications 7/1840 and 7/1885
(A/C 1 thru 39 with S.O.O. 7002) (VHF Communication System)

Jan 15, 1982
DHC-7 7-23-10

Communications - Headset Cable Holder Installation
- Modification 7/1939
(A/C 1 thru 59 with SICMA Crew Seats)

Jan 8, 1982 May 7, 1982 'A'
DHC-7 7-23-1

Audio Integrating Systems - Wiring Revision
- Modification 7/1262
(A/C 1, 2 and 4)

Sep 29, 1978

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