Parts · Engine

Cylinder Head

84 failure reports named the cylinder head in the last ten years, 532 since 1995, most often on the Cessna 172 Skyhawk; the condition most often found was "cracked". 17 FAA approvals let 9 companies make a replacement cylinder head, Rotair Industries INC holding the most (3).

Reports by year

Reports by year, as a table

	reports
1995	2
1996	1
1997	1
1998	5
1999	5
2000	9
2001	23
2002	10
2003	30
2004	34
2005	35
2006	39
2007	36
2008	13
2009	43
2010	10
2011	26
2012	28
2013	14
2014	16
2015	68
2016	12
2017	10
2018	27
2019	4
2020	3
2021	4
2022	4
2023	3
2024	6
2025	7
2026	4

Which system the reports file it under last ten years

Engine83Airframe structure1

Reports by system, as a table

	reports
Engine	83
Airframe structure	1

Models most often reporting it last ten years

Cessna 172 Skyhawk18Piper PA-28 Cherokee, Warrior, Archer and Arrow17Cirrus SR2210Cessna T182 Turbo Skylane4Piper PA-31 Navajo and Chieftain4Cessna 1503Cessna 414 Chancellor3Diamond Aircraft DA 42 Twin Star3Piper PA-44 Seminole3Cessna 182 Skylane2Dehavilland DHC-22Airbus A3001

Models most reported, as a table

	reports
Cessna 172 Skyhawk	18
Piper PA-28 Cherokee, Warrior, Archer and Arrow	17
Cirrus SR22	10
Cessna T182 Turbo Skylane	4
Piper PA-31 Navajo and Chieftain	4
Cessna 150	3
Cessna 414 Chancellor	3
Diamond Aircraft DA 42 Twin Star	3
Piper PA-44 Seminole	3
Cessna 182 Skylane	2
Dehavilland DHC-2	2
Airbus A300	1

How it failed the condition found, last ten years

cracked52separated15bypassing4broken2low pressure2unknown2burned1damaged1failed1melted1

Conditions found, as a table

	reports
cracked	52
separated	15
bypassing	4
broken	2
low pressure	2
unknown	2
burned	1
damaged	1
failed	1
melted	1

Engines most often reporting it

Lycoming O-320-D3G 12Lycoming IO-360-L2A 11Continental TSIO-550-K 7Lycoming O-360-A4M 7Continental TSIO-520-NB 4Lycoming TIO-540-AK1A 4Continental IO-550-N 3Lycoming O-320-D2G 3Continental O-200A 2Continental O-470-U 2

Approved replacement parts 17 parts manufacturer approvals

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

Rotair Industries INC 3Design Engineering 3Airmotive Engineering CORP 3Aero Accessories INC 3Sun Air Parts 1Slick Aircraft Products, Division of Unison Ind 1Pacific Propeller INC 1Continental Motors INC 1Continental Aerospace Technologies INC 1

For these models most: Sikorsky S-61 (3), Piper PA-31 Navajo and Chieftain (1), Beechcraft B36 Bonanza (1), Beechcraft 95 Travel Air and Baron 55 (1).

Maker	Part	Replaces	Fits	Granted	Status
Continental Aerospace Technologies INC	Cylinder Head AE11640	11640	Pratt & Whitney Wasp R-1340-E, 19, 22	2020-01-06	current
Aero Accessories INC	Cylinder Head Temperature Bulb AA86146	Cessna P/N 8013601-4, 8013601-6	Textron Aviation Cessna) (210, 310, 335	2019-04-28	current
Aero Accessories INC	Cylinder Head Temperature Bulb AA86146	Beechcraft P/N AN5546-1, 102-00007, MS24482-1	Textron Aviation Beech) (95-55, 95-B55, G58	2019-04-28	current
Aero Accessories INC	Cylinder Head Temperature Bulb AA86146	Piper P/N AN5546-1, 102-00007, 453 751	Piper Aircraft Company PA-31, PA-31-300, PA-31-325	2019-04-28	current
Continental Motors INC	Cylinder Head AE11640	11640	Pratt & Whitney Wasp R-1340-E, 19, 22	2017-01-08	current
Pacific Propeller INC	Cylinder Head PPI 50220	Modification Part	Hamilton Sundstrand 12D40	2005-06-27	current
Airmotive Engineering CORP	Cylinder Head AE11640	Pratt & Whitney P/N 11640	Pratt & Whitney Wasp R1340-E, -19, -22	1999-04-19	current
Slick Aircraft Products, Division of Unison Ind	Cylinder Head Temperature Probe M-5340-XX	Modification Part	Textron Lycoming IO-540-K1A5, K1B5, K1C5 K1D5	1997-12-03	current
Rotair Industries INC	Cylinder & Head Assembly R6110-26403-3	S6110-26403-3	Sikorsky S61L/N/NM	1997-10-19	current
Sun Air Parts	Assembly-Cylinder Head Oil Drain (Include Tab Repl) SAP14671, SAP14671P6, P10, P15	Pratt & Whitney 14671	Pratt & Whitney R-1340 Wasp series S3H1, S1H1, S1H2	1997-07-10	current
Airmotive Engineering CORP	Cylinder Head AEC6477	Continental 6674	Teledyne Continental C75-8, C75-8F, C75-8FH	1997-03-17	current
Airmotive Engineering CORP	Cylinder Head AEC65315	Continental 626687	Teledyne Continental C75-8, C75-8F, C75-8FH	1997-03-17	current
Rotair Industries INC	Cylinder & Head Assembly R6110-26403-2	S6110-26403-2	Sikorsky S-61L, S-61N, S-61NM	1992-09-29	current
Design Engineering	Rear cylinder head 415832P20	P&W 415832P20	Pratt & Whitney R2800-CB	1992-07-07	current
Design Engineering	Front cylinder head 415828P20	415828P20	Pratt & Whitney R2800-CB	1992-07-07	current
Design Engineering	Cylinder Head 415828	P&W 415828	Pratt & Whitney R2800-CB Double Wasp	1992-07-07	current
Rotair Industries INC	Cylinder Head & Assembly R6110-26403-3	Sikorsky S6110-26403-3	Sikorsky S-61L, S-61N, S-61NM	1992-06-30	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.