Parts · Engine

Ignition Unit

30 failure reports named the ignition unit in the last ten years, 57 since 1999, most often on the Boeing 737; the condition most often found was "failed". 35 FAA approvals let 4 companies make a replacement ignition unit, Aircraft Heating & Electrical holding the most (16).

Reports by year

Reports by year, as a table

	reports
1999	1
2004	4
2005	4
2006	1
2009	2
2010	2
2011	3
2012	1
2013	5
2014	1
2015	3
2016	2
2018	6
2019	4
2020	5
2021	6
2022	4
2023	1
2024	2

Which system the reports file it under last ten years

Engine26Heating, ice protection and utility systems4

Reports by system, as a table

	reports
Engine	26
Heating, ice protection and utility systems	4

Models most often reporting it last ten years

Boeing 73711Boeing 7678Cessna 4024Airbus A3201Airbus A3211Boeing 7571Bombardier DHC-8 Dash 8 and Q4001Embraer EMB-135 ERJ 135 and Legacy1Robinson R441

Models most reported, as a table

	reports
Boeing 737	11
Boeing 767	8
Cessna 402	4
Airbus A320	1
Airbus A321	1
Boeing 757	1
Bombardier DHC-8 Dash 8 and Q400	1
Embraer EMB-135 ERJ 135 and Legacy	1
Robinson R44	1

How it failed the condition found, last ten years

failed9faulty6inoperative5faulted2malfunctioned2broken1burned1burned out1defective1melted1

Conditions found, as a table

	reports
failed	9
faulty	6
inoperative	5
faulted	2
malfunctioned	2
broken	1
burned	1
burned out	1
defective	1
melted	1

Engines most often reporting it

Lycoming O-540-F1B5 1

Approved replacement parts 35 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a ignition unit and sell it as an approved part for the models named. These are the companies holding such approvals for a ignition unit:

Aircraft Heating & Electrical 16 Janaero Devices 9 C & D Associates 9 Hartzell Engine Technologies LLC 1

For these models most: Piper PA-31 Navajo and Chieftain (5), Piper PA-34 Seneca (3), Piper PA-60 Aerostar (2), Piper PA-39 Twin Comanche C/R (2), Piper PA-30 Twin Comanche (2), Cessna T337 (2), Cessna 320 (2), Beechcraft A60 (2), Beechcraft 58 Baron (2), Piper PA-44 Seminole (1), Cessna T303 (1), Cessna T-310 (1).

Maker	Part	Replaces	Fits	Granted	Status
Hartzell Engine Technologies LLC	Ignition Unit CD41381	721340, 722081	Beechcraft Corporation D18S) Textron Aviation Inc. (Cessna)...	2016-04-28	current
Aircraft Heating & Electrical	Ignition Unit AHE17E24-5	Janitrol 17E24-5, 87D24-7	Cessna T337G, P337H	2000-10-19	current
Aircraft Heating & Electrical	Ignition Unit AHE90E12-2	Janitrol 90E12-2, 87D12-2, Piper 755-456	Piper PA-E23-250 (S/N 27-3050, 27-3154...	2000-10-19	current
Aircraft Heating & Electrical	Ignition Unit AHE91E12-2	Janitrol 91E12-2, 92D12-2, 81D12-3, B08D50,...	Piper PA-E23-250 (S/N 27-3050, 27-3154...	2000-10-19	current
Aircraft Heating & Electrical	Ignition Unit AHE17E24-4	Janitrol 17E24-4, 87D24-2, Piper 755-458, 755-493	Aerostar Aircraft PA-60-600, PA-60-601, PA-60-601P	2000-10-19	current
Aircraft Heating & Electrical	Ignition Unit AHE17E24-9	Janitrol 17E24-9, 87D24-9	Beech Raytheon) (76 (S/N ME-183 and UP)	2000-10-19	current
Aircraft Heating & Electrical	Ignition Unit AHE17E24-1	Janitrol 17E24-1, 87D24-6, Piper 755-463, 755-483	Piper PA-31T, PA-31T1, PA-31P	2000-10-19	current
Aircraft Heating & Electrical	Ignition Unit AHE91E24-5	Janitrol 91E24-5, 92D24-5, A52D70	Piper PA-31P (S/N 31P-3 thru 31P-7530008),...	2000-10-19	current
Aircraft Heating & Electrical	Ignition Unit AHE19E24-2	Janitrol 19E24-2, 19E24-1	Beech Raytheon) (58P, 58PA	2000-10-19	current
Aircraft Heating & Electrical	Ignition Unit AHE91E12-4	Janitrol 91E12-4, 92D12-4, 81D12-5, D08D50	Piper PA-30 (S/N 30-402 and UP), PA-39	2000-10-19	current
Aircraft Heating & Electrical	Ignition Unit AHE90E12-7	Janitrol 90E12-7, 87D12-7	Beech Raytheon) (76 (S/N ME-2 thru ME-182)	2000-10-19	current
Aircraft Heating & Electrical	Ignition Unit AHE91E24-2	Janitrol 91E24-2, 92D24-2, 81D24-3, B07D97,...	Aerostar Aircraft PA-60-600 (S/N 60-0001 thru...	2000-10-19	current
Aircraft Heating & Electrical	Ignition Unit AHE90E12-6	Janitrol 90E12-6, 87D12-6	Piper PA-30 (S/N 30-402 and UP), PA-39	2000-10-19	current
Aircraft Heating & Electrical	Ignition Unit AHE17E24-3	Janitrol 17E24-3, 87D24-3, Piper 755-464	Britten Norman BN2A MK III, BN2A MK III-2, BN2A MK III-3	2000-10-19	current
Aircraft Heating & Electrical	Ignition Unit AHE91E24-6	Janitrol 91E24-6, 92D24-6, 81D24-5, D07D97	Cessna 337G (S/N 33701463 thru 33701671),...	2000-10-19	current
Aircraft Heating & Electrical	Ignition Unit AHE91E24-3	Janitrol 91E24-3, 92D24-3, 81D24-4, C07D97,...	Piper PA-31-350 (S/N 31-5001 thru...	2000-10-19	current
Aircraft Heating & Electrical	Ignition Unit AHE17E24-8	Janitrol 17E24-8, 87D24-5	Beech Raytheon) (95-B55/95-B55A (S/N...	2000-10-19	current
C & D Associates	Ignition Unit Assembly 3002	Janitrol 11C30	Miscellaneous FAA/PMA aircraft combustion heater...	1993-04-28	current
C & D Associates	Ignition Unit 4114	Janitrol 14E00-1	Miscellaneous FAA/PMA aircraft combustion heater...	1993-04-28	current
C & D Associates	Ignition Unit 8702	Southwind G-722081 w/o cover	Miscellaneous FAA/PMA aircraft combustion heater...	1993-04-28	current
C & D Associates	Ignition Unit 3006	Janitrol 87D24-5	Miscellaneous FAA/PMA aircraft combustion heater...	1993-04-28	current
C & D Associates	Ignition Unit 3005	Janitrol 17E24-4	Miscellaneous FAA/PMA aircraft combustion heater...	1993-04-28	current
C & D Associates	Ignition Unit 8706	Southwind G-722081	Miscellaneous FAA/PMA aircraft combustion heater...	1993-04-28	current
C & D Associates	Ignition Unit 3055	Janitrol 81D24-4	Miscellaneous FAA/PMA aircraft combustion heater...	1993-04-28	current
C & D Associates	Ignition Unit 3100	Janitrol 87D12-2	Miscellaneous FAA/PMA aircraft combustion heater...	1993-04-28	current
C & D Associates	Ignition Unit 3004	Janitrol 17E24-3	Miscellaneous FAA/PMA aircraft combustion heater...	1993-04-28	current
Janaero Devices	Ignition Unit 4114	Janitrol 14E00-1	Miscellaneous Acft Comb. Heater & TC Acft Inst'l...	1993-04-17	current
Janaero Devices	Ignition Unit 3005	Janitrol 17E24-4	Miscellaneous Acft Comb. Heater & TC Acft Inst'l...	1993-04-17	current
Janaero Devices	Ignition Unit 3055	Janitrol 81D24-4	Miscellaneous Acft Comb. Heater & TC Acft Inst'l...	1993-04-17	current
Janaero Devices	Ignition Unit 3004	Janitrol 17E24-3	Miscellaneous Acft Comb. Heater & TC Acft Inst'l...	1993-04-17	current
Janaero Devices	Ignition Unit 3100	Janitrol 87D12-2	Miscellaneous Acft Comb. Heater & TC Acft Inst'l...	1993-04-17	current
Janaero Devices	Ignition Unit 3006	Janitrol 87D24-5	Miscellaneous Acft Comb. Heater & TC Acft Inst'l...	1993-04-17	current
Janaero Devices	Ignition Unit 8706	Southwind G-722081	Miscellaneous Acft Comb. Heater & TC Acft Inst'l...	1993-04-17	current
Janaero Devices	Ignition Unit Assembly 3002	Janitrol 11C30	Miscellaneous Acft Comb. Heater & TC Acft Inst'l...	1993-04-17	current
Janaero Devices	Ignition Unit 8702	Southwind G-722081	Miscellaneous Acft Comb. Heater & TC Acft Inst'l...	1993-04-17	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.