| 2024-08-04 | Time Limits/ Maintenance Checks | Jun 20, 2024 | Airframe (DHC-8-402) |
| 2024-02-02 | De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier… | Mar 21, 2024 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4633 |
| 2023-16-05 | De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier… | Sep 25, 2023 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4633 |
| 2023-07-06 | Stabilizers | Jun 20, 2023 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4549 |
| 2023-06-03 | Landing Gear | May 18, 2023 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–on |
| 2023-05-01 | De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier… | Apr 18, 2023 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4633 |
| 2023-01-09 | Fuel System | Mar 13, 2023 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–on |
| 2022-25-06 | Air Conditioning System | Jan 23, 2023 | Airframe (DHC-8-402)Certain serial numbers: DHC-8-402 4095–4633 |
| 2022-23-01 | Fuel | Dec 13, 2022 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–on |
| 2022-17-04 | Fuel System; and 05, Time Limits/Maintenance Checks | Nov 1, 2022 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–on |
| 2022-13-08 | Landing gear | Aug 10, 2022 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4622 |
| 2022-11-14 | Landing gear | Jun 21, 2022 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–on |
| 2022-06-15 | Pneumatic | May 10, 2022 | Airframe (DHC-8-402) |
| 2022-03-02 | Wings | Mar 17, 2022 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4628 |
| 2022-01-02 | Nacelles/ pylons | Mar 3, 2022 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4550; 4583–4585; 4587; 4588; 4590 |
| 2021-23-02 | Fire protection | Jan 5, 2022 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4614 |
| 2021-23-03 | Landing Gear | Dec 6, 2021 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–on |
| 2021-19-11 | Flight controls | Nov 18, 2021 | Airframe (DHC-8-402)Serial numbers per De Havilland Service Bulletin 8-27-123, Revision A (DHC-8-100/200/300); De Havilland Service Bulletin 84-27-74, Revision B (DHC-8-400) |
| 2021-12-02 | Nacelles/ pylons | Jul 20, 2021 | Airframe (DHC-8-402)Certain serial numbers: 4081–4591 |
| 2021-11-04 | Landing Gear | Jul 9, 2021 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4534 |
| 2021-10-13 | Landing gear | Jul 1, 2021 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4608 |
| 2020-21-03 | Doors | Nov 18, 2020 | Airframe (DHC-8-402)Certain serial numbers: 4001–4530 |
| 2020-13-06 | Pratt & Whitney Canada Corp. Turboprop Engines | Aug 6, 2020 | Engine (PW150A)Only with: High-pressure (HP) centrifugal impeller P/N 3049127-01 installed. |
| 2020-09-12 | Stabilizers | Jun 24, 2020 | Airframe (DHC-8-402)Certain serial numbers: 4001–on |
| 2020-02-10 | Fire protection | Mar 12, 2020 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–on |
| 2019-24-12 | Fuselage | Feb 3, 2020 | Airframe (DHC-8-402)Certain serial numbers: 4327; 4330; 4337; 4342; 4350; 4352; … |
| 2019-22-11 | Main landing gear | Jan 9, 2020 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–on. Only with: Equipped with main landing gear (MLG) forward stabilizer brace P/N 46401-7. |
| 2019-20-09 | Wings | Nov 27, 2019 | Airframe (DHC-8-402)Certain serial numbers: 4001–4437 |
| 2019-18-05 | Landing gear | Oct 31, 2019 | Airframe (DHC-8-402)Certain serial numbers: 4001–4585; 4587 |
| 2019-15-09 | Wings | Sep 19, 2019 | Airframe (DHC-8-402)Certain serial numbers: 4001–4547. Only with: Having outboard spoiler actuator mounting brackets P/N 85714052-101 or 85714052-102. |
| 2018-20-18 | Flight controls | Nov 20, 2018 | Airframe (DHC-8-402)Certain serial numbers: 4001–on |
| 2018-17-17 | Ice and Rain Protection | Oct 2, 2018 | Airframe (DHC-8-402)Certain serial numbers: 4001–4524 |
| 2018-17-09 | Landing gear | Sep 25, 2018 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–on |
| 2018-02-16 | Doors | Mar 5, 2018 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4488. Only with: Except airplanes incorporating Bombardier ModSum IS4Q5200050. |
| 2017-23-01 | Landing gear | Dec 19, 2017 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4325 |
| 2017-20-07 | Fire protection | Nov 6, 2017 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4504 |
| 2017-19-27 | Flight controls | Nov 1, 2017 | Airframe (DHC-8-402)Serial numbers per Parker Service Bulletin 390700-27-002, Revision 1, section 4. Appendix (spoiler PCU S/Ns). Only with: Equipped with spoiler PCU P/N 390700-1007 or -1009 having PCU S/N 0474 through 1321, S/N listed in Parker SB 390700-27-002 Rev 1 Appendix, or S/N 1394 through 1876 without suffix "A". |
| 2017-17-02 | Electrical power | Sep 25, 2017 | Airframe (DHC-8-402)Certain serial numbers: 4035–4347 |
| 2017-14-02 | Equipment/ furnishings | Aug 10, 2017 | Airframe (DHC-8-402)Serial numbers per Bombardier Service Bulletin 84-25-169, Revision B, dated February 17, 2017 |
| 2017-09-11 | Doors | Jun 29, 2017 | Airframe (DHC-8-402)Certain serial numbers: 4001–4473. Only with: Equipped with Bombardier ModSum 4-422100 or ModSum 4-458687 (Jetway Compatible Passenger Airstair Door). |
| 2017-06-10 | Lights | May 1, 2017 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4507 |
| 2017-05-11 | Landing gear | Apr 17, 2017 | Airframe (DHC-8-402)Certain serial numbers: 4001–4424 |
| 2016-24-04 | Fuselage | Jan 17, 2017 | Airframe (DHC-8-402)Certain serial numbers: 4156–4453; 4456; 4457 |
| 2016-24-03 | Stablizers | Jan 12, 2017 | Airframe (DHC-8-402)Certain serial numbers: 4001–on |
| 2016-22-03 | Propellers/ propulsors | Nov 30, 2016 | Airframe (DHC-8-402) |
| 2016-19-11 | Ice and rain protection | Nov 2, 2016 | Airframe (DHC-8-402)Certain serial numbers: 4001–4184 |
| 2016-16-15 | Landing Gear | Sep 23, 2016 | Airframe (DHC-8-402)Certain serial numbers: 4001–4431 |
| 2016-01-09 | Doors | Feb 25, 2016 | Airframe (DHC-8-402)Certain serial numbers: 4001–on |
| 2015-19-13 | Flight Controls | Nov 3, 2015 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4453. Only with: Outboard spoiler power control unit (PCU) P/N 390700-1007 installed in the outboard position. |
| 2015-17-03 | Landing Gear | Oct 7, 2015 | Airframe (DHC-8-402)Certain serial numbers: 4001–4419 |
| 2015-17-25 | Fuel | Oct 7, 2015 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4417 |
| 2015-15-07 | Hydraulic Power | Aug 12, 2015 | Airframe (DHC-8-402)Certain serial numbers: 4001–4424 |
| 2015-13-02 | Fire protection | Jul 31, 2015 | Airframe (DHC-8-402)Certain serial numbers: 4001–4424 |
| 2015-08-03 | Landing Gear | May 26, 2015 | Airframe (DHC-8-402)Certain serial numbers: 4001–4109 |
| 2015-02-25 | Fuel | Mar 17, 2015 | Airframe (DHC-8-402)Certain serial numbers: 4063–4118 |
| 2015-02-12 | Bombardier, Inc. Airplanes | Mar 6, 2015 | Airframe (DHC-8-402)Certain serial numbers: 4001–4454 |
| 2014-23-14 | Fuel | Dec 31, 2014 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4417. Only with: Installed engine fuel feed ejector pump having P/N 2960008-102. |
| 2014-19-02 | Flight Controls | Oct 24, 2014 | Airframe (DHC-8-402)Certain serial numbers: 4166–4175 |
| 2014-16-07 | Landing Gear | Sep 23, 2014 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4418; 4422; 4423 |
| 2014-15-20 | Pneumatic | Sep 19, 2014 | Airframe (DHC-8-402)Certain serial numbers: 4001–4446 |
| 2014-15-03 | Pratt & Whitney Canada Corporation Turboprop Engines | Aug 27, 2014 | Engine (PW150A)Certain serial numbers: PW150A …–PCE-FA0916 |
| 2014-05-18 | Landing gear | Apr 22, 2014 | Airframe (DHC-8-402) |
| 2014-03-04 | Bombardier, Inc. Airplanes | Apr 9, 2014 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4364 |
| 2013-22-04 | Flight controls | Dec 5, 2013 | Airframe (DHC-8-402)Certain serial numbers: DHC-8-102 003–672; DHC-8-103 003–672; DHC-8-106 003–672; DHC-8-201 003–672; DHC-8-202 003–672; DHC-8-301 003–672; … |
| 2013-22-09 | Flight Controls | Dec 5, 2013 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–on. Only with: Equipped with rudder feel trim unit (RFTU) P/N 399500-1007. |
| 2013-16-25 | Fire protection | Oct 4, 2013 | Airframe (DHC-8-402)Certain serial numbers: 4001–4399 |
| 2013-13-17 | Flight controls | Aug 26, 2013 | Airframe (DHC-8-402)Certain serial numbers: 4001–4334; 4336 |
| 2013-09-04 | Fire protection | Aug 2, 2013 | Airframe (DHC-8-402)Certain serial numbers: 4001–4382 |
| 2012-22-07 | Electrical Power | Dec 14, 2012 | Airframe (DHC-8-402)Certain serial numbers: 4001–on |
| 2012-21-12 | Landing gear | Dec 4, 2012 | Airframe (DHC-8-402)Certain serial numbers: 4001–4346 |
| 2012-20-08 | Electrical Power | Nov 21, 2012 | Airframe (DHC-8-402)Certain serial numbers: 4001–4338. Only with: Honeywell AC generator P/N 1152218-3, 1152218-4 or 1152218-5 installed. |
| 2012-20-09 | Landing Gear | Nov 20, 2012 | Airframe (DHC-8-402)Certain serial numbers: 4001–4247 |
| 2012-20-04 | Wings | Nov 14, 2012 | Airframe (DHC-8-402)Certain serial numbers: 4001–4382 |
| 2012-18-15 | Ice and rain protection | Oct 22, 2012 | Airframe (DHC-8-402)Certain serial numbers: 4001–on. Only with: Equipped with Aerazur timer and monitor unit (TMU) P/N 4100S018-06. |
| 2012-16-10 | Power Plant | Sep 18, 2012 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4354; 4356–4363 |
| 2012-12-16 | Wings | Jul 30, 2012 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–4106 |
| 2012-06-05 | Doors | Apr 27, 2012 | Airframe (DHC-8-402)Certain serial numbers: 4001–4361 |
| 2012-06-04 | Fuselage | Apr 25, 2012 | Airframe (DHC-8-402)Certain serial numbers: 4161–4296 |
| 2012-04-08 | Flight controls | Apr 10, 2012 | Airframe (DHC-8-402)Certain serial numbers: DHC-8-102 003–672; DHC-8-103 003–672; DHC-8-106 003–672; DHC-8-201 003–672; DHC-8-202 003–672; DHC-8-301 003–672; … |
| 2012-02-12 | Electrical Power | Feb 15, 2012 | Airframe (DHC-8-402)Certain serial numbers: 4095–4391 |
| 2011-24-03 | Bombardier, Inc. Airplanes | Jan 3, 2012 | Airframe (DHC-8-402)Certain serial numbers: 4001–on |
| 2011-17-17 | Bombardier, Inc. Model DHC-8-400 Series Airplanes | Oct 18, 2011 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003; 4004; 4006; 4008–4208 |
| 2011-18-17 | Bombardier, Inc. Model DHC-8-400 Series Airplanes | Oct 18, 2011 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003–on |
| 2011-18-18 | Bombardier, Inc. Model DHC-8-400 Series Airplanes | Oct 14, 2011 | Airframe (DHC-8-402)Certain serial numbers: 4001–4305 |
| 2011-13-06 | Bombardier, Inc. Model DHC-8-400 Series Airplanes | Aug 1, 2011 | Airframe (DHC-8-402)Certain serial numbers: 4003; 4004; 4006; 4008–4205 |
| 2011-11-02 | Bombardier, Inc. Model DHC-8-400 Series Airplanes | Jun 22, 2011 | Airframe (DHC-8-402)Certain serial numbers: 4001–4190; 4199–4201; 4203–4216. Only with: Equipped with a motive flow check valve (MFCV) having P/N 2960018-101. |
| 2011-09-12 | Bombardier, Inc. Model DHC-8-101, -102, -103, -106, -201, -202, -301, -311, -315, -401… | Jun 6, 2011 | Airframe (DHC-8-402)Certain serial numbers: DHC-8-101 003–566; DHC-8-102 003–566; DHC-8-103 003–566; DHC-8-106 003–566; DHC-8-201 003–566; DHC-8-202 003–566; … |
| 2010-23-04 | Bombardier, Inc. Model DHC-8-400 Series Airplanes | Nov 22, 2010 | Airframe (DHC-8-402)Certain serial numbers: 4001–on |
| 2010-21-02 | Bombardier, Inc. Model DHC-8 Airplanes | Nov 12, 2010 | Airframe (DHC-8-402)Certain serial numbers: DHC-8-101 003–658; DHC-8-102 003–658; DHC-8-103 003–658; DHC-8-106 003–658; DHC-8-201 003–658; DHC-8-202 003–658; … |
| 2010-14-11 | Bombardier, Inc. Model DHC-8-400 Series Airplanes | Aug 17, 2010 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003; 4004; 4006; 4008–4227 |
| 2010-14-16 | Bombardier, Inc. Model DHC-8-400, -401, and -402 Airplanes | Aug 17, 2010 | Airframe (DHC-8-402)Certain serial numbers: 4001; 4003; 4004; 4006; 4008–4184 |
| 2010-12-06 | Bombardier, Inc. Model DHC-8-400 Series Airplanes | Jul 13, 2010 | Airframe (DHC-8-402)Certain serial numbers: 4105–4179 |
| 2010-10-04 | Bombardier, Inc. Model DHC-8-400 Series Airplanes | May 20, 2010 | Airframe (DHC-8-402)Certain serial numbers: 4001–4169 |
| 2010-09-07 | Bombardier, Inc. Model DHC-8-400 Series Airplanes | May 14, 2010 | Airframe (DHC-8-402)Only with: Equipped with Thales angle of attack (AOA) vanes having P/N C16177AC. |
| 2010-01-06 | Bombardier, Inc. (Type Certificate Previously Held by de Havilland, Inc.) Model… | Feb 9, 2010 | Airframe (DHC-8-402)Certain serial numbers: 4135–4149 |