Type Record · As of May 3, 2026
DEHAVILLAND DHC-6
Fixed Wing Multi Engine
Registered
4
Year Range
1968–1968
NTSB Events
0
Airworthiness Directives
7
Aircraft Resources
01 / Distribution
Where the fleet lives and was built
Counts of currently-registered DEHAVILLAND DHC-6 aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.
By State (top 10)
- NV 25.0% 1
- TX 25.0% 1
- UT 25.0% 1
- CA 25.0% 1
By Decade of Manufacture
- 1960s 25.0% 1
- Unknown 75.0% 3
02 / NTSB Records
Events involving DEHAVILLAND DHC-6 aircraft
No NTSB-recorded events match DEHAVILLAND DHC-6 in the indexed corpus.
02c / Academic Research
Scholarly work mentioning DEHAVILLAND DHC-6
Papers and reports across NASA, NTSB, FAA CAMI, AOPA ASI, Embry-Riddle, arXiv, and the broader academic graph that mention this airframe. Title or keyword match — drill into each for full abstract + author list + PDF link.
- NASA NTRS 2019 · Contractor Report (CR)
DHC-6 Twin Otter Tailplane Airfoil Section Testing in the Ohio State University 7x10 Wind Tunnel
Ice contaminated tailplane stall (ICTS) has been found to be responsible for 16 accidents with 139 fatalities over the last three decades, and is suspected to have played a role in other accidents and…
- NASA NTRS 2019 · Reprint (Version printed in journal)
In-Flight Aerodynamic Measurements of an Iced Horizontal Tailplane
The effects of tailplane icing on aircraft dynamics and tailplane aerodynamics were investigated using, NASA's modified DHC-6 Twin Otter icing research aircraft.
- NASA NTRS 2019 · Reprint (Version printed in journal)
Investigation of Dynamic Flight Maneuvers With an Iced Tailplane
A detailed analysis of two of the dynamic maneuvers, the pushover and elevator doublet, from the NASA/FAA Tailplane Icing Program are discussed.
Browse the full corpus — academia portal ↗
03 / Airworthiness Directives
FAA directives applicable to DEHAVILLAND DHC-6
7 directive(s) on file. Showing the most recent 7.
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Dec 12, 2005
Airworthiness Directives; Shadin ADC-2000 Air Data Computers
The FAA adopts a new airworthiness directive (AD) for certain Shadin ADC-2000 air data computers (ADC) installed on airplanes. This AD requires you to replace affected ADC-2000 units with a modified unit. This AD results from reports that certain ADC-2000 units display incorrect altitude information on the Electronic…
-
Sep 9, 2005
Airworthiness Directives; Goodrich De-icing and Specialty Systems “FASTprop” Propeller De-icers
The FAA is adopting a new airworthiness directive (AD) for Goodrich De-icing and Specialty Systems "FASTprop" propeller de- icers, part numbers P4E1188 series, P4E1601 series, P4E2200 series, P4E2271-10, P4E2575-7, P4E2575-10, P4E2598-10, P5855BSW, P6199SW, P6592SW, P6662SW, and P6975-11, installed. This AD requires i…
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Aug 17, 2005
Airworthiness Directives; Shadin ADC-2000 Air Data Computers
The FAA proposes to adopt a new airworthiness directive (AD) for certain Shadin ADC-2000 air data computers (ADC) installed on airplanes. This proposed AD would require you to replace affected ADC- 2000 units with a modified unit. This proposed AD results from reports that certain ADC-2000 units display incorrect alti…
-
Apr 6, 2005
Airworthiness Directives; Goodrich De-icing and Specialty Systems “FASTprop” Propeller De-icers
The FAA proposes to adopt a new airworthiness directive (AD) for Goodrich De-icing and Specialty Systems "FASTprop" propeller de- icers, part numbers P4E1188 series, P4E1601 series, P4E2200 series, P4E2271-10, P4E2575-7, P4E2575-10, P4E2598-10, P5855BSW, P6199SW, P6592SW, P6662SW, and P6975-11, installed. This propose…
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Feb 14, 2001
Airworthiness Directives; Marathon Power Technologies Company
This document proposes adopting a new airworthiness directive (AD) for certain nickel cadmium batteries produced by Marathon Power Technologies Company (Marathon). The AD would require visually inspecting screws installed on Marathon batteries and replacing certain unairworthy screws. This proposal is prompted by an e…
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May 7, 1997
Airworthiness Directives; de Havilland DHC-6 Series Airplanes
This document clarifies information in an existing airworthiness directive (AD) that applies to de Havilland DHC-6 series airplanes that do not have a certain wing strut modification (Modification 6/1581) incorporated. That AD currently requires inspecting the wing struts for cracks or damage (chafing, etc.), replacin…
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Apr 26, 1996
Airworthiness Directives; Hartzell Propeller Inc. HC-A3V, HC-B3M, HC-B3T, HC-B4M, HC-B4T, and HC-B5M Series Propellers
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to Hartzell Propeller Inc. (Hartzell) HC-A3V, HC-B3M, HC-B3T, HC-B4M, HC- B4T, and HC-B5M series propellers. This proposal would require hub replacement over a 10-year time period with a concurrent blade and blade clamp inspec…
06 / Supplemental Type Certificates
Modifications approved for DEHAVILLAND DHC-6
10 STCs on file — every FAA-approved modification, alteration, or installation for this aircraft. STOL kits, avionics, fuel systems, floats, engine swaps, you name it.
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04/09/2010
STC SA00269BO (2 OF 3)
Installation of Avidyne Corporation TWX 670 Tactical Weather Detection System P/N 850-00026-000-( ) consisting of Avidyne Processor P/N 700-00033-000-( ), Sensor Systems Inc. Anten…
Avidyne Corporation
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12/30/2008
STC SA00269BO (2 OF 3)
Installation of Avidyne Corporation TWX 670 Tactical Weather Detection System P/N 850-00026-000-( ) consisting of Avidyne Processor P/N 700-00033-000-( ), Sensor Systems Inc. Anten…
Avidyne Corporation
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07/22/2008
STC SA01861SE (PAGE 2)
Fabrication and installation of Landing Light Controller
Seaton Engineering Corp.
-
05/21/2008
STC SA01473SE (2 OF 5)
Installation of a GTX 32 (mode C), GTX 33 (mode S), or GTX 33D (mode S with diversity) Remote Transponde
Garmin AT Inc.
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04/07/2008
STC SA00269BO (2 OF 3)
Installation of Avidyne Corporation TWX 670 Tactical Weather Detection System P/N 850-00026-000-( ) consisting of Avidyne Processor P/N 700-00033-000-( ), Sensor Systems Inc. Anten…
Avidyne Corporation
-
01/04/2008
STC SA01800SE (PG 3)
Fabrication and installation of new or replacement of existing instrument panel lights dimmer control.
Seaton Engineering Corp.
-
12/18/2007
STC SA4005NM (Page 1)
Precise Flight Inc. Pulselite Control System
Precise Flight Inc
-
11/05/2006
STC SA01933LA (2 OF 5)
Installation of Garmin Model 400W / 500W Series GPS-WAAS Navigation System
Garmin AT Inc.
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02/26/2003
STC SA39CH
Installation of amphibian landing gear position advisory system.
Lake & Air Inc
-
03/09/1993
STC SA1626NM Page 1
Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series)
Electronics International
07 / PMA replacement parts
FAA-approved replacement parts for DEHAVILLAND DHC-6
60+ parts on file from the FAA Parts Manufacturer Approval database. Each is a non-OEM part the FAA has authorized for use as a replacement on this aircraft type.
-
1193VRW#https://drs.faa.gov/browse/excelExternalWindow/FE131ECC8552F31686257F0700735220.0001##
Marker- Closed
Aero Decals Inc replaces C61005653
PMA holder → -
AAT-711419#https://drs.faa.gov/browse/excelExternalWindow/F9157A3B581800ED86257F80004A9ECA.0001##
Piston Tube
Advantage Aviation Technologies, Inc. replaces DeHavilland P/N 71-141-9
PMA holder → -
AAT-711419#https://drs.faa.gov/browse/excelExternalWindow/0BFB86343020BE5B86257C2E006A9E15.0001##
Piston Tube
Advantage Aviation Technologies, Inc. replaces DeHavilland P/N 71-141-9
PMA holder → -
AAT-711419#https://drs.faa.gov/browse/excelExternalWindow/E5B0BC655F81CABD8625792D00628DFD.0001##
Piston Tube
Advantage Aviation Technologies, Inc. replaces DeHavilland P/N 71-141-9
PMA holder → -
MDL PF6-1000#https://drs.faa.gov/browse/excelExternalWindow/CADA6C2C8193D3ED8625782900530D48.0001##
Fail Lights, Pitot Heater
IKHANA Aircraft Services replaces Modification Part
PMA holder → -
MDL PF6-1000#https://drs.faa.gov/browse/excelExternalWindow/503295F8684373548625793600567194.0001##
Fail Lights, Pitot Heater
IKHANA Aircraft Services replaces Modification Part
PMA holder → -
MDL PF6-1000#https://drs.faa.gov/browse/excelExternalWindow/ABED2191629E5A81862576DD0050102B.0001##
Fail Lights, Pitot Heater
IKHANA Aircraft Services replaces Modification Part
PMA holder → -
213666#https://drs.faa.gov/browse/excelExternalWindow/B6CB105C6D4FFAE3862573CA00593C33.0001##
Synchronizer Kits
Woodward Inc replaces -
PMA holder → -
AB16B12#https://drs.faa.gov/browse/excelExternalWindow/C7C78B6588DDB14186257417007BB3CD.0001##
Rivet
Aero Brake & Spares Inc replaces GY16B12 For use on ABS (Goodyear) Brake assembly P/N 5001571-4 and 5001571-6
PMA holder → -
ABWA182-5#https://drs.faa.gov/browse/excelExternalWindow/3F63A3D051AB25328625740300743279.0001##
Washer
Aero Brake & Spares Inc replaces GWA182-5, Rev.C For use on ABS (Goodyear) Wheel Assy-Main P/N 5000444-3
PMA holder → -
00625001 or 00625100#https://drs.faa.gov/browse/excelExternalWindow/454EA51DEB31CCA7862573FD0073DE07.0001##
Underseat Baggage Restraint Bar
Devore Aviation Corp of America replaces -
PMA holder → -
00600001#https://drs.faa.gov/browse/excelExternalWindow/008C03DE7E0F99ED862573FD0073D2DC.0001##
Emblem Light -Stabilizer
Devore Aviation Corp of America replaces -
PMA holder → -
C38214#https://drs.faa.gov/browse/excelExternalWindow/311330C212A5CEA686257EF300681426.0001##
Adaptor
Parker Hannifin Corp replaces C38214
PMA holder → -
C38214#https://drs.faa.gov/browse/excelExternalWindow/2C5356E786DEB0F586257EF30067DFC1.0001##
Adaptor
Parker Hannifin Corp replaces C38214
PMA holder → -
MA150-301#https://drs.faa.gov/browse/excelExternalWindow/BE81EAEE1205042186257B9500678031.0001##
Air Conditioner Installation DHC-6 Twin Otter Kit
ZEE Systems Inc replaces Modification Part
PMA holder → -
K43-R134#https://drs.faa.gov/browse/excelExternalWindow/BEF00665E4A6281C86257B9500678035.0001##
Modification Kit
ZEE Systems Inc replaces Modification Part
PMA holder → -
A5529VWB#https://drs.faa.gov/browse/excelExternalWindow/D87840C30C5DA56786257B740072B2BF.0001##
Marker- Stripe
Aero Decals Inc replaces C6CE132727
PMA holder → -
DHC6-000#https://drs.faa.gov/browse/excelExternalWindow/5074E020EB6F69848625782900530D1B.0001##
Freon Air Conditioning System
IKHANA Aircraft Services replaces DHC6-000
PMA holder → -
WR6-1002-61#https://drs.faa.gov/browse/excelExternalWindow/F6A218AD2749A0698625782900530CF2.0001##
Re-Life Wing Box R/H
IKHANA Aircraft Services replaces Modification Part
PMA holder → -
WR6-1002-59#https://drs.faa.gov/browse/excelExternalWindow/7BA02677CC6853DA8625782900530CC2.0001##
Re-Life Wing Box L/H
IKHANA Aircraft Services replaces Modification Part
PMA holder → -
DHC6-000#https://drs.faa.gov/browse/excelExternalWindow/2056E775A7B71F848625793600567159.0001##
Freon Air Conditioning System
IKHANA Aircraft Services replaces DHC6-000
PMA holder → -
WR6-1002-61#https://drs.faa.gov/browse/excelExternalWindow/2755D77DDF6FD8F3862579360056711F.0001##
Re-Life Wing Box R/H
IKHANA Aircraft Services replaces Modification Part
PMA holder → -
WR6-1002-59#https://drs.faa.gov/browse/excelExternalWindow/6F84EA0692B835168625793600567024.0001##
Re-Life Wing Box L/H
IKHANA Aircraft Services replaces Modification Part
PMA holder → -
DHC6-000#https://drs.faa.gov/browse/excelExternalWindow/A9F4C6FCCD5B458B862576DD00501075.0001##
Freon Air Conditioning System
IKHANA Aircraft Services replaces DHC6-000
PMA holder → -
WR6-1002-61#https://drs.faa.gov/browse/excelExternalWindow/E2AF5341D7626B9D862576DD00500FEE.0001##
Re-Life Wing Box R/H
IKHANA Aircraft Services replaces Modification Part
PMA holder → -
WR6-1002-59#https://drs.faa.gov/browse/excelExternalWindow/7FDCEDA7C2E866E0862576DD00500F4D.0001##
Re-Life Wing Box L/H
IKHANA Aircraft Services replaces Modification Part
PMA holder → -
PDMC6WM1409-33#https://drs.faa.gov/browse/excelExternalWindow/A0B2B863A5AECF08862570AF00745D06.0001##
Bushing
PMA Design & Manufacturing replaces C6WM1409-33
PMA holder → -
PDMC6WM1409-31#https://drs.faa.gov/browse/excelExternalWindow/167D98FB0D40BC4B862570AF0074544E.0001##
Bushing
PMA Design & Manufacturing replaces C6WM1409-31
PMA holder → -
PDMC6WM1409-29#https://drs.faa.gov/browse/excelExternalWindow/9EEDCC18C6E8ED10862570AF00744BD6.0001##
Bushing
PMA Design & Manufacturing replaces C6WM1409-29
PMA holder → -
250SG115Q#https://drs.faa.gov/browse/excelExternalWindow/2153E1215374B076862576F0004FD482.0001##
Starter- Generator
Skurka Aerospace Inc replaces Modification Part
PMA holder → -
951#https://drs.faa.gov/browse/excelExternalWindow/49F68CE0686A438A862573BD005DBB35.0001##
Right Windshield
LP Aero Plastics Inc replaces DehavillandC6FS1207-28
PMA holder → -
950#https://drs.faa.gov/browse/excelExternalWindow/1C9F3CAA8EF400DF862573BD005DBB1F.0001##
Left Windshield
LP Aero Plastics Inc replaces DehavillandC6FS1207-27
PMA holder → -
P/N C6SC1062-4#https://drs.faa.gov/browse/excelExternalWindow/0C192AAC2048935986257FFE005BECF9.0001##
R/H Windshield
PPG Industries Inc replaces Dehavilland P/N C6SC1062-4 Rev. G or later FAA approval
PMA holder → -
P/N C6SC1062-3#https://drs.faa.gov/browse/excelExternalWindow/AB448B63CA811F7886257FFE005BEC39.0001##
L/H Windshield
PPG Industries Inc replaces Dehavilland P/N C6SC1062-3 Rev. G or later FAA approval
PMA holder → -
7350721-7#https://drs.faa.gov/browse/excelExternalWindow/049C19AB921E1D9D8525703D005E0741.0001##
Mount Installation Engine
Hutchinson Aerospace & Industry Inc replaces DeHavilland 7350721-7
PMA holder → -
7350721-8#https://drs.faa.gov/browse/excelExternalWindow/F36E7F567214F1D18525703D005E0742.0001##
Mount Installation Engine
Hutchinson Aerospace & Industry Inc replaces DeHavilland 7350721-8
PMA holder → -
7350721-8#https://drs.faa.gov/browse/excelExternalWindow/2DA9537B1B6F14288525703D005E0D57.0001##
Isolator Assembly
Hutchinson Aerospace & Industry Inc replaces DeHavilland 7350721-8
PMA holder → -
ST-472#https://drs.faa.gov/browse/excelExternalWindow/95D494E36A439A88862575540062BFF5.0001##
Autopilot
S-TEC Corporation replaces -
PMA holder → -
Dwg No. 992-1486-001#https://drs.faa.gov/browse/excelExternalWindow/BCE82007BC6B76C68525704A005B226A.0001##
APS-65 Autopilot Installation Kit
Rockwell Collins Inc. replaces Boeing of Canada Ltd., de Havilland Division 992-1486-001
PMA holder → -
7350721-7#https://drs.faa.gov/browse/excelExternalWindow/B8134FAFDB8FE0328525703D005E0D56.0001##
Isolator Assembly
Hutchinson Aerospace & Industry Inc replaces DeHavilland 7350721-7
PMA holder →
+ 20 more PMA parts on file
04 / Regulations watching this type
Advisory Circulars and Federal Register activity for DEHAVILLAND DHC-6
Advisory Circulars
No ACs explicitly mention this type. Showing universal operating-rule ACs that apply to all aircraft.
Recent Federal Register activity
Latest rulemakings touching general operating rules (Part 91) and maintenance rules (Part 43).
- 2026-04-17 Settlement Policy for Small Unmanned Aircraft System (UAS) Cases FR ↗
- 2026-02-10 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period; Denial of Extension FR ↗
- 2026-02-02 25-Hour Cockpit Voice Recorder (CVR) Requirement, New Aircraft Production FR ↗
- 2026-01-28 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period FR ↗
- 2026-01-07 Requirements for Interference-Tolerant Radio Altimeter Systems FR ↗
05 / Aircraft of this type
All 4 registered N-numbers
Every tail currently on the FAA registry for this make/model. Click an N-number to query the FAA Aircraft Inquiry; rows flagged ● have NTSB events on file. Tails seeded with full TallyAero pages link directly.
05 / Sources & Methodology
Every count traces back to a primary US-government source
- FAA Aircraft Registry →
Refreshed Apr 27, 2026
Available
- NTSB CAROL →
Refreshed Apr 27, 2026
Available
- Federal Register (FAA Airworthiness Directives) →
Refreshed Apr 27, 2026
Available
We render counts and lists as the agency publishes them. Read the methodology →