Parts · Instruments and avionics

Transponder

42 failure reports named the transponder in the last ten years, 404 since 1995, most often on the Boeing 767; the condition most often found was "failed". 24 FAA approvals let 6 companies make a replacement transponder, Cpi Eimac Division holding the most (10). The reports call it "transponder", "transponder,".

Reports by year

Reports by year, as a table

	reports
1995	21
1996	21
1997	54
1998	52
1999	35
2000	10
2001	23
2002	20
2003	32
2004	6
2005	15
2006	12
2007	5
2008	4
2009	14
2010	6
2011	6
2012	6
2013	7
2014	3
2015	10
2016	6
2017	1
2018	4
2019	5
2020	2
2021	5
2023	3
2024	10
2025	3
2026	3

Which system the reports file it under last ten years

Instruments and avionics41Heating, ice protection and utility systems1

Reports by system, as a table

	reports
Instruments and avionics	41
Heating, ice protection and utility systems	1

Models most often reporting it last ten years

Boeing 7678Cessna 208 Caravan8Airbus A3202Airbus A3212Airbus BD-5002Boeing 7472Cessna 206 Stationair2Mcdonnell Douglas MD-112Messerschmitt-Bolkow-Blohm BK 1172Airbus Helicopters AS350 AStar (Écureuil), now H1251Airbus A3191Beechcraft 300 King Air 3001

Models most reported, as a table

	reports
Boeing 767	8
Cessna 208 Caravan	8
Airbus A320	2
Airbus A321	2
Airbus BD-500	2
Boeing 747	2
Cessna 206 Stationair	2
Mcdonnell Douglas MD-11	2
Messerschmitt-Bolkow-Blohm BK 117	2
Airbus Helicopters AS350 AStar (Écureuil), now H125	1
Airbus A319	1
Beechcraft 300 King Air 300	1

How it failed the condition found, last ten years

failed14malfunctioned7faulted6inoperative4defective3smoke2fault message1fumes1inaccurate1no test1

Conditions found, as a table

	reports
failed	14
malfunctioned	7
faulted	6
inoperative	4
defective	3
smoke	2
fault message	1
fumes	1
inaccurate	1
no test	1

Engines most often reporting it

Lycoming IO-360-L2A 1Lycoming IO-540-AC1A5 1Pratt & Whitney PT6A series 1Turbomeca (Safran) ARRIEL 2D 1

Approved replacement parts 24 parts manufacturer approvals

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

Cpi Eimac Division 10Cpi/Mpp Division 5Cpi/Eimac Division 4Teledyne Controls 2Teledyne Controls LLC 2Rockwell Collins INC. 1

For these models most: Boeing 747 (12), Boeing 727 (10), Boeing 737 (8), Dassault MYSTERE-FALCON 50 (4), Dassault FALCON 2000 (3), Dassault FALCON 900 (2), British Aerospace BAE 146 (2), Dassault MYSTERE FALCON 900 (1).

Maker	Part	Replaces	Fits	Granted	Status
Cpi/Mpp Division	612A6A Transponder 8906AL	256-0192-020	Boeing 747-100, 227B, 251F	2019-10-27	current
Cpi/Mpp Division	612A3 Transponder ML7815AL	256-0197-020	Boeing 727-200, 251B, 251F	2019-10-27	current
Cpi/Mpp Division	612A3 Transponder 8906AL	256-0192-020	Boeing 727-200, 251B, 251F	2019-10-27	current
Cpi/Mpp Division	621A6A Transponder ML7815AL	256-0197-020	Boeing 747-100, 227B, 251F	2019-10-27	current
Cpi/Mpp Division	860E-2 Transponder 7815AL	256-0197-010	Boeing 747-251F, 2J9F, 251B	2019-10-27	current
Cpi Eimac Division	612A3 Transponder ML7815AL	256-0197-020	Boeing 727-200, 251B, 251F	2018-04-11	current
Cpi Eimac Division	612A6A Transponder 8906AL	256-0192-020	Boeing 747-100, 227B, 251F	2018-04-11	current
Cpi Eimac Division	860E-2 Transponder 7815AL	256-0197-010	Boeing 747-251F, 2J9F, 251B	2018-04-11	current
Cpi Eimac Division	621A6A Transponder ML7815AL	256-0197-020	Boeing 747-100, 227B, 251F	2018-04-11	current
Cpi Eimac Division	612A3 Transponder 8906AL	256-0192-020	Boeing 727-200, 251B, 251F	2018-04-11	current
Teledyne Controls LLC	Transponder 724855-802	724855-802	Dassault Falcon 2000, Mystere Falcon 50	2016-01-03	current
Teledyne Controls LLC	Transponder 724855-801	724855-801	Dassault Mystere Falcon 50, Falcon 900 EX,...	2016-01-03	current
Rockwell Collins INC.	Transponder, TCAS Control Panel TTC-2100 822-1787-101	822-1787-101	Boeing 747-8F Series	2011-11-02	current
Cpi Eimac Division	621A6A Transponder ML7815AL	256-0197-020	Boeing 747-100, 227B, 251F	2006-05-24	current
Cpi Eimac Division	860E-2 Transponder 7815AL	256-0197-010	Boeing 747-251F, 2J9F, 251B	2006-05-24	current
Cpi Eimac Division	612A3 Transponder ML7815AL	256-0197-020	Boeing 727-200, 251B, 251F	2006-05-24	current
Cpi Eimac Division	612A3 Transponder 8906AL	256-0192-020	Boeing 727-200, 251B, 251F	2006-05-24	current
Cpi Eimac Division	612A6A Transponder 8906AL	256-0192-020	Boeing 747-100, 227B, 251F	2006-05-24	current
Teledyne Controls	Transponder 724855-801	724855-801	Dassault Aviation Mystere Falcon 50, Falcon 900 EX,...	2001-12-13	current
Teledyne Controls	Transponder 724855-802	724855-802	Dassault Aviation Falcon 2000, Mystere Falcon 50	2001-12-13	current
Cpi/Eimac Division	612A6A Transponder 8906AL	Rockwell International 256-0192-020	Boeing 747-100, -227B, -251F	1997-09-30	current
Cpi/Eimac Division	612A3 Transponder 8906AL	Rockwell International 256-0192-020	Boeing 727-200, -251B, -251F	1997-09-30	current
Cpi/Eimac Division	621A6A Transponder ML7815AL	Rockwell International 256-0197-020	Boeing 747-100, -227B, -251F	1997-09-30	current
Cpi/Eimac Division	612A3 Transponder ML7815AL	Rockwell International 256-0197-020	Boeing 727-200, -251B, -251F	1997-09-30	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.