The following notes, preceded by dates, are extracts from the Canadian Department of Transport files held in Ottawa. Researched by Ian M. Macdonald.
12-Apr-1951 Application for registration by de Havilland Aircraft of Canada for DHC-3 King Beaver prototype msn 1.
04-Dec-1951 CF-DYK-X allotted to King Beaver prototype (DHC did not want to use a registration from their current block of registrations).
• CF-DYK de Havilland Canada, Downsview, Ontario. Rolled out 10-Dec-1951. First Flight 12-Dec-1951.
• CF-DYK-X Registered in experimental category as a new aircraft type.
24-Jun-1952 Aircraft Inspection Release Certificate issued (by then, it was referred to as the Otter).
18-Jul-1952 Certificate of Registration #11152 issued, private, experimental.
25-Sep-1952 Temporary Certificate of Airworthiness valid for 60 days issued with requirement of placard visible to pilot -VIOLENT APPLICATION OF RUDDER IN FLIGHT IS PROHIBITED.
14-Oct-1952 Aircraft Inspection Release Certificate issued by DHC. Test flown for the certificate by R. Bannock 17-Oct-1952).
17-Oct-1952 Application for registration for DHC-3 Otter msn 1 (date of manufacture given as Mar-1952), supersedes Apr-1951 application.
17-Oct-1952 Temporary Certificate of Airworthiness valid 60 days issued. Same placard as above required.
30-Oct-1952 requirement for placard (above) removed.
07-Nov-1952 Aircraft Type Approval issued.
22-Dec-1952 Temporary authority to operate as a private aircraft (land & seaplane) valid to 22- Mar-1953 pending issue of formal Certificate of Airworthiness.
22-Dec-1952 Certificate of Registration #11590 issued (paper certificate produced 22-Jan-1953).
22-Jan-1953 Certificate of Airworthiness #3866 issued.
That file ends abruptly there with the issue of the Canadian Certificate of Registration and the Certificate of Airworthiness.
Note: Griffin’s CANADIAN MILITARY AIRCRAFT lists Otter msn 1 taken on strength by the Royal Canadian Air Force on 20-Feb-1953, serialled 3667, and stuck of strength 28-Feb-1963.
• 3667 Royal Canadian Air Force. For dates see above.
• 3667-X Painted as such as still considered experimental.
Note: It was issued to Department of Defence Production and loaned back to DHC for experimental use. (Transaction via Crown Assets nominally dated 30-Jun-1963).
Note: Although ownership retained by RCAF stayed on “permanent loan with DHC.
21-Jun-1965 Application for registration Otter msn 1 for Department of Defence Production.
Undated. (No record on this file of when the marks CF-SKX were allotted).
• CF-SKX Department of Defence Production, Ottawa Jun-1965
• CF-SKX-X Department of Defence Production. Ottawa. Jun-1965. Still considered experimental.
29-Jun-1965 DHC advise Department of Transport that it is to be used by Defence Industries Research Programme and request a one year Flight Permit.
08-Jul-1965 Flight Permit #351 issued, with restrictions included aeronautical research projects for Defence Industries Research Programme.
08-Jul-1965 Certificate of Registration #21543 issued to Department of Defence Production.
14-Jul-1966 Flight Permit extended to 08 Jul-1967.
• CF-SKX Ownership reverted to DHC, Jun-1968.
21-Jul-1967 Flight Permit extended to 20-JUL-1968.
05-Sep-1968 Flight Permit extended to 15-AUG-1969.
24-Feb-1969 Bill of Sale; DHC to Lamb Enterprises Ltd., The Pas, MB.
• CF-SKX Lambair, The Pas, MB, Bill of Sale 24-Feb-1969.
• CF-SKX Registration transferred to Lamb Enterprises Ltd. Feb-1969.
• CF-AUS Re regd to Lamb Enterprises Ltd. ,The Pas, MB, but see note below!
27-Feb-1969 Temporary Certificate of Registration and Flight Permit issued to Lambair for ferry Downsview-Calgary valid to 27-Mar-1969.
Note: About this time there was a mix-up between Department of Transport offices, confusion between msn 1 and some former Royal Norwegian Air Force Otters being imported resulting in marks CF-AUS being erroneously assigned, the allocation was quickly cancelled when the error became obvious, it was never formally registered CF-AUS.
08-May-1969 Bill of Sale; Lamb Enterprises Ltd., to Carter Air Services Ltd, Hay River NT.
• CF-AUS With erroneous registration, sold to Carter Air Services, Hay River, NT.
06-Jun-1969 Application for registration by Carter Air Services Ltd.
19-Jun-1969 Tom Lamb advises Department of Transport that he has refunded Carter Air Services’ purchase price because of doubts about the conformity of msn 1 to the Aircraft Type Certificate due to previous experimental status. After much discussion between Department of Transport, Lamb and Field Aviation Ltd, Calgary, who were doing the engineering work, the aircraft was passed as conforming.
• CF-SKX Taken back by Lamb Enterprises 19-Jun-1969 because of confusions with certification.
28-Aug-1969 Certificate of Registration and Flight Permit for test flight issued to Lambair Ltd., valid to 04-Sep-1969.
02-Sep-1969 Application for registration by Lamb Enterprises Ltd., The Pas, MB.
03-Sep-1969 Certificate of Airworthiness issued.
05-Sep-1969 Certificate of Registration issued to Lamb Enterprises Ltd., The Pas, MB.
• CF-SKX After intervention by Department of Transport they determined that previous registration had to be retained.
15-Dec-1969 Bill of Sale; Lamb Enterprises Ltd to Geo-Terrex Ltd.
07-Jan-1970 application for registration, Geo-Terrex Ltd., Ottawa, ON.
07-Jan-1970 Certificate of Registration issued to Geo-Terrex Ltd., Ottawa, ON.
• CF-SKX Geo-Terrex Ltd, Ottawa, ON. Regd 07-Jan-1970.
18-Mar-1970 Personal Plane Services Ltd., Ottawa, ON., request Experimental Flight Permit to evaluate installation of wing tip extension EM pods.
18-Mar-1970 Experimental Flight Permit #624 issued. The letter -X to be appended to the registration.
• CF-SKX-X Re regd to Geo-Terrex Ltd., Ottawa, ON. Mar-1970.
19-Mar-1970 Test flights by J. Croal and R.J. Laroche.
07-Apr-1970 Aeronautical Engineering recommend temporary clearance for CF-SKX to be placarded to maximum speed 145 mph, to 09 May-1970.
08-Apr-1970 Completion of EM Magnetometer and Spectrometer survey equipment installation by Personal Plane Services Ltd.
(Camera installation, toroid magnetometer head, EM coils under wing tips, mag’ head suspended under wing, similar to installation on Otter msn 75 (Rio Tinto Exploration Co), circa 1955.
• CF-SKX Reverted to previous registration style.
10-Apr-1970 Leased to Laurentian Air Services Ltd., to be maintained and operated by Laurentian Air Services Ltd., for one year.
23-Apr-1970 temporary Certificate of Registration issued to Laurentian Air Services, lease from Geo-Terrex Ltd., valid to 23-Jun -1970.
Accident: Dunrobin, ON. 01-May-1970. During high speed stability tests, both wings failed from severe negative loading, torsional flutter and high aerodynamic stresses and broke of the aircraft. The aircraft crashed to the ground and the pilot, Laurentian AirServices' James Patrick Croal and sole occupant were killed.
15-Sep-1970 Cancelled from Canadian Civil Aircraft Register.