Thermal Switch
19 failure reports named the thermal switch in the last ten years, 66 since 1995, most often on the Boeing 747; the condition most often found was "failed". 86 FAA approvals let 9 companies make a replacement thermal switch, Honeywell International US LLC holding the most (64).
Reports by year
Reports by year, as a table
| reports | |
|---|---|
| 1995 | 2 |
| 1996 | 1 |
| 1998 | 1 |
| 2004 | 3 |
| 2005 | 5 |
| 2006 | 5 |
| 2007 | 9 |
| 2008 | 5 |
| 2009 | 1 |
| 2010 | 6 |
| 2011 | 3 |
| 2012 | 2 |
| 2013 | 2 |
| 2014 | 1 |
| 2015 | 1 |
| 2016 | 3 |
| 2017 | 1 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 2 |
| 2021 | 5 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 2 |
| 2025 | 1 |
Which system the reports file it under last ten years
Reports by system, as a table
| reports | |
|---|---|
| Heating, ice protection and utility systems | 14 |
| Emergency equipment | 4 |
| Engine | 1 |
Models most often reporting it last ten years
Boeing 7473Bombardier CL-600 Challenger and CRJ3Boeing 7672Cessna 560 Citation V, Ultra, Encore and Excel2Embraer EMB-145 ERJ 1452Embraer EMB-505 Phenom 3002Boeing 7371Boeing 7571Costruzioni Aeronautiche Tecna P20121Raytheon Corporate Jets Inc HAWKER 8001Swearingen SA2271
Models most reported, as a table
How it failed the condition found, last ten years
failed5faulted5defective4erratic2degraded1false indication1inoperative1
Conditions found, as a table
| reports | |
|---|---|
| failed | 5 |
| faulted | 5 |
| defective | 4 |
| erratic | 2 |
| degraded | 1 |
| false indication | 1 |
| inoperative | 1 |
Approved replacement parts 86 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a thermal switch and sell it as an approved part for the models named. These are the companies holding such approvals for a thermal switch:
Honeywell International US LLC 64Pma Design & Manufacturing 6Measure Tech INC 6Airborne Maintenance & Engineering Services 3Soundair Design and Development Group LLC 2Honeywell International INC. Honeywell Aerospace 2Soundair Aviation Services 1L2 Aviation 1Honeywell International 1
For these models most: Boeing 747 (21), Boeing 737 (16), Boeing 767 (10), Boeing 757 (8), Boeing 727 (6), Boeing 707 (6), Dehavilland DHC-6 (5), Douglas DC-8 (3), Dehavilland DHC-7 (3), Airbus A319 (3), Bombardier CL-600 Challenger and CRJ (2), Boeing 717 (2).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Soundair Aviation Services | THERMAL SWITCH SP2510-00-10010 | 352-0983-1 | MHI RJ Aviation ULC CL-600-2C11 (Regional Jet Series 550) | 2025-03-20 | current |
| Airborne Maintenance & Engineering Services | THERMAL SWITCH ASSY SPZ-21-001-101 | SPZ-21-001-101 | Airbus A319-133, A321-200 Series | 2022-08-25 | current |
| Honeywell International INC. Honeywell Aerospace | Thermal Switch 683478-1 | 683478-1 | Boeing 717-200 | 2021-04-21 | current |
| Honeywell International INC. Honeywell Aerospace | Thermal Switch 927214-1-1 | 927214-1-1 | Boeing 737-200 Series, 737-200C Series... | 2021-04-21 | current |
| Airborne Maintenance & Engineering Services | THERMAL SWITCH ASSY SPZ-21-001-101 | SPZ-21-001-101 | Airbus A319-100, A321-200 | 2021-03-03 | current |
| Measure Tech INC | Thermal Switch 975-0172-006MT | 975-0172-006 3000-46-29 | Boeing 737-300 Series, 737-400 Series,... | 2019-11-14 | current |
| Measure Tech INC | Thermal Switch 975-0018-007MT | 975-0018-007 | Boeing 727-200 Series, 737-100 Series,... | 2017-12-19 | current |
| Measure Tech INC | Thermal Switch 975-0172-006MT | 975-0172-006, 3000-46-29 | Boeing 737-300 Series, 737-400 Series,... | 2017-03-20 | current |
| Measure Tech INC | Thermal Switch 975-0018-007MT | 975-0018-007 | Boeing 727-200 Series, 737-100 Series,... | 2017-01-11 | current |
| Airborne Maintenance & Engineering Services | THERMAL SWITCH ASSY SPZ-21-001-101 | SPZ-21-001-101 | Airbus A319-133 | 2016-11-08 | current |
| Measure Tech INC | Thermal Switch 975-0172-006MT | 975-0172-006, 3000-46-29 | Boeing 737-300 Series, 737-400 Series,... | 2015-03-12 | current |
| Measure Tech INC | Thermal Switch 975-0172-006MT | 975-0172-006, 3000-46-29 | Boeing 737-300 Series, 737-400 Series,... | 2014-12-09 | current |
| Pma Design & Manufacturing | Thermal Switch Assembly PDM17343-62-450 | PDM17343-62-450DEG | Viking Air Limited DHC-6-400 series | 2014-08-04 | current |
| Pma Design & Manufacturing | Thermal Switch Assembly PDM17343-62-300 | PDM17343-62-300DEG | Viking Air Limited DHC-6-400 series | 2014-08-04 | current |
| L2 Aviation | Thermal Switch Assembly SPZ-21-001-101 | Modification Part | Airbus A340-300 Series | 2013-11-03 | current |
| Soundair Design and Development Group LLC | Thermal Switch SP2510-00-10010 | 352-0983-1 | Airbus A300 Series, A300, Model B2-1A | 2012-07-31 | current |
| Soundair Design and Development Group LLC | Thermal Switch SP2510-00-10010 | 352-0983-1 | Airbus A300 Series, A300, Model B2-1A | 2012-05-30 | current |
| Honeywell International US LLC | THERMAL SWITCH 975-0172-012 | 975-0172-012 | BOEING 737-700 SERIES 737-800 SERIES... | 2010-04-11 | current |
| Pma Design & Manufacturing | Thermal Switch Assembly PDM17343-62-450 | Gulfstream 17343-62-450 | Gulfstream II, IIB, III | 2009-04-02 | current |
| Pma Design & Manufacturing | Thermal Switch Assembly PDM17343-62-450 | De Havilland Saab 17343-62-450 | Viking Air Limited DHC-6-100, -200, -300 series) Saab... | 2006-05-15 | current |
| Pma Design & Manufacturing | Thermal Switch Assembly PDM17343-62-300 | De Havilland Saab 17343-62-300 | Viking Air Limited DHC-6-100, -200, -300 series) Saab... | 2006-05-15 | current |
| Pma Design & Manufacturing | Thermal Switch Assembly PDM17343-62-450 | De Havilland Saab 17343-62-450 | Saab Aircraft AB SF340A, 340B series, DHC-6-100 | 2006-05-15 | current |
| Honeywell International | Thermal Switch 3100-101-3 | 3100-101-3 | Boeing 747-400 SERIES | 2004-12-19 | current |
| Honeywell International US LLC | Thermal Switch 975-0025-001 | 10-60133-5 | Boeing 727-200, 300 | 2001-07-18 | current |
| Honeywell International US LLC | Thermal Switch 975-0018-007 | Boeing 10-3207-1 | Boeing 747-100, -200, -300 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0579-003 | 975-0579-003 | McDonnell Douglas DC-8-71, -72, -73 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0612-002 | 975-0612-002 | Boeing 767-300 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0191-005 | LS10791-040D1 | Lockheed L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0044-001 | 10-1468-8 | Boeing 727-200, 737-100, -200 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0376-001 | 975-0376-001 | deHavilland DHC-7 (MODELS 100, 101) | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0002-002 | 10-1468-11 | Boeing 747-400 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0145-007 | 975-0145-007 | Boeing 747-100, -200 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0200-001 | LOCKHEED 740818-101 | Lockheed L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0191-008 | LS10791-110U2 | Lockheed L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0456-002 | 60B98806-4 | Boeing 747-100, -200 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0145-006 | 975-0145-006 | Boeing 747-100 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0304-001 | 975-0304-001 | Boeing 747-100, -200, -300 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0024-001 | 2221-1A | Boeing 707-300 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0090-001 | 975-0090-001 | Boeing 707-100, -300, 720 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0304-004 | 975-0304-004 | Boeing 747-100, -200, -300 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0304-007 | 975-0304-007 | Boeing 767-300 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0191-012 | LS10791-080U2A | Lockheed L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0579-002 | 975-0579-002 | McDonnell Douglas DC-8-71, -72, -73 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0432-002 | 975-0432-002 | Boeing 747 Series | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0200-013 | LS741801-101 | Lockheed L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0191-004 | LS10791-055D1 | Lockheed L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0376-003 | 975-0376-003 | deHavilland DHC-7 (MODELS 100, 101) | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0002-001 | 10-1468 | Boeing 707-300, 727-200, 737-200 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0200-014 | LS741889-101 | Lockheed L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0221-001 | 975-0221-001 | Boeing 737, CL600-1A11, CL-600-2A12 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0191-002 | LS10791-045D1 | Lockheed L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0359-002 | 975-0359-002 | Boeing 747-300 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0304-008 | BOEING 975-0304-008 | Boeing 757-300 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0191-009 | LS10791-060D1 | Lockheed L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0172-008 | 975-0172-008 | Boeing 747-200, -300 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0376-005 | 975-0376-005 | deHavilland DHC-7 (MODELS 100, 101) | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0621-002 | 975-0621-002 | Boeing 747-400 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0196-003 | 975-0196-003 | McDonnell Douglas DC-10-10, -10F, -15 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0188-005 | LOCKHEED 740849-107 | Lockheed L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0427-001 | 975-0427-001 | Boeing 747-SR, 747SP, L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0208-001 | LOCKHEED 741086-101 | Lockheed L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0200-003 | LOCKHEED 741111-101 | Lockheed L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0191-010 | LS10791-050D1 | Lockheed L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0191-003 | LS10791-130U1 | Lockheed L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0188-004 | LOCKHEED 740849-105 | Lockheed L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0304-002 | 975-0304-002 | Boeing 747-100, -200, -300 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0090-004 | 975-0090-004 | Boeing 747-200, -300, 747-SP | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0172-006 | 975-0172-006 | Boeing 737-300, 767-200, -300 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0208-002 | LOCKHEED 741086-103 | Lockheed L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0116-001 | 10-1468-5 | Boeing 737-300, -400, -500 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0167-001 | 975-0167-001 | McDonnell Douglas DC-8-61, -61F, -62 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0172-010 | 975-0172-010 | Boeing 747-400 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0200-015 | LS741801-103 | Lockheed L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 973-2003-256 | 256T040A052 | McDonnell Douglas DC-9-31, -32, -32F | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0145-005 | 975-0145-005 | Boeing 747-100 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0304-003 | 975-0304-003 | Boeing 747-400, 757-200, 767-200 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0612-001 | 975-0612-001 | Boeing 767-200, -300, 747-400 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0062-002 | 975-0062-002 | Boeing 737-200, -300 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0304-006 | 975-0304-006 | Boeing 767-300 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0191-001 | LS10791-090U1 | Lockheed L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0200-006 | LOCKHEED 740895-103 | Lockheed L-1011 | 2001-06-24 | current |
| Honeywell International US LLC | Thermal Switch 975-0200-008 | LOCKHEED 741592-101 | Lockheed L-1011 | 2001-05-03 | current |
| Honeywell International US LLC | Thermal Switch 975-0432-001 | SUNDSTRAND AEROSPACE 975-0432-001 | Boeing 747 SERIES | 2001-05-03 | current |
| Honeywell International US LLC | Thermal Switch 683478-1 | 683478-1 | Boeing 717-200 | 2000-01-06 | current |
| Honeywell International US LLC | Thermal Switch 927214-1-1 | Boeing Commercial 927214-1-1 | Boeing 737-200, 707-300 | 1997-02-17 | current |
| Honeywell International US LLC | Thermal Switch 2221-1A | Boeing 2221-1A | Boeing 707-300 | 1992-12-13 | current |
Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.