Engines, series by series
The FAA records an engine code for 263,435 aircraft, 2,431 different series in all. Each one has a page: how many aircraft carry it, which models it is fitted to, where they are and who operates them. The most common ones are listed here; any aircraft page links to its engine's page.
27,303
Lycoming O-320 series
piston (reciprocating) · 180 hp
12,780
Continental O-470 series
piston (reciprocating) · 230 hp
11,931
Lycoming O-360 / VO-360 series
piston (reciprocating) · 180 hp
9,485
Continental IO-520 series
piston (reciprocating) · 285 hp
8,792
Continental O-200 series
piston (reciprocating) · 100 hp
8,560
Lycoming IO-360 series
piston (reciprocating) · 180 hp
7,964
Continental A65 / C65 series
piston (reciprocating) · 65 hp
6,625
Continental O-300 series
piston (reciprocating) · 145 hp
6,132
Lycoming O-235 series
piston (reciprocating) · 115 hp
5,245
Lycoming O-540 series
piston (reciprocating) · 250 hp
5,074
Lycoming TIO-540 series
piston (reciprocating) · 310 hp
4,724
Continental IO-470 series
piston (reciprocating) · 260 hp
Lycoming 93,091 aircraft · 56 series listed
O-320 series 27,303O-360 / VO-360 series 11,931IO-360 series 8,560O-235 series 6,132O-540 series 5,245TIO-540 series 5,074IO-540 series 4,222IO-360-L2A 2,650O-290 series 2,126IO-320 series 1,708O-360 series 1,069O-360-A1D 1,057IO-540-AE1A5 1,044IO-360-B4A 1,000AEIO-360 series 885IO-360-A1B6D 844IO-390-C3B6 809IO-540-AB1A5 774TIO-540-AJ1A 721O-360-A1A 601IO-360-M1A 551O-145B series 538TIO-540-AK1A 508TIO-540-AE2A 488AEIO-540 series 434O-360-A4M 418HIO-360 series 390YIO-390 series 333IO-390 series 312O-360-A1P 302O-540-F1B5 299TIO-541 series 273O-320-E2D 258O-360-J2A 254AEIO-580-B1A 254GO-480 series 246IO-540-D4A5 239R680E series 225CC363I 219R680 219IO-360-A1A 196IO-360-A1D6 193VO-435 series 191IO-360-M1B 185IO-360-B1E 183IO-360-B1G6 180IO-540-C4B5 179O-320-A2B 179YIO-540 SERIE 149IO-360-A1B6 141O-360-C1G 141YIO-360-M1B 136O-435A/O-435C 135O-320-D3G 133GO-435C&D series 130AEIO-360-H1B 125
Continental 85,471 aircraft · 37 series listed
O-470 series 12,780IO-520 series 9,485O-200 series 8,792A65 / C65 series 7,964O-300 series 6,625IO-470 series 4,724C85 series 4,672TSIO-520 series 4,110IO-550 series 3,077TSIO-550-K 2,819IO-550-N 2,789C90 series 2,149TSIO-360 series 1,907IO-360 series 1,854C145 series 1,828A75 / C75 series 1,505E185 series 1,108W670 series 987E225 series 980GO-300 series 809TSIO-550-C 480IO-360-ES 401GTSIO-520-C 386TSIO-550 series 382IO-550-B 374O-200 329C125 series 322O-200A 297IO-240-B 212O-200-D 210IO-550-C 199GTSIO-520 series 179R670-series 170GTSIO-520-F-K 169A-65-8 137IO-346 series 131TSIO-550-G 129
Rotax 12,326 aircraft · 18 series listed
Pratt & Whitney Canada 10,890 aircraft · 41 series listed
PT6A-60A 1,177PT6A-67P 509JT15D 5 series 450PT6A-65AG 430PW535E 412PT6A-42A 384JT15D-4 357PW306D1 351PT6A66D 322PW308C 307PT6E-67XP 294PW545 series 287PT6A-67B 277PT6A-34AG 272PT6A-52 266PW615F-A 257PT6A-114A 250PW610F-A 243PT6A-140 238PT6A-34 235PW545C 227PW535E1 218PW306C 213PT6B-37A 186PT6A series 181PW617F-E 179PW815GA 178PW814GA 175PT6A-42 172PT6A-6 series 170PT6E-66XT 164PT6A-135A 161PT6A-66 series 160JT15D-1 159PT6A-67AG 159PW545B 154PT6A-67A 153PW306A 151PW206B2 146530A 140PW307A 126
Pratt & Whitney 5,538 aircraft · 6 series listed
Rolls-Royce 2,642 aircraft · 10 series listed
Williams International 2,639 aircraft · 6 series listed
General Electric 2,601 aircraft · 7 series listed
CFM International 2,057 aircraft · 5 series listed
Honeywell 1,971 aircraft · 7 series listed
Franklin 1,652 aircraft · 4 series listed
Allison (Rolls-Royce) 1,404 aircraft · 4 series listed
International Aero Engines 866 aircraft · 4 series listed
AiResearch (Honeywell) 843 aircraft · 3 series listed
Rolls-Royce Deutschland 827 aircraft · 3 series listed
Turbomeca (Safran) 786 aircraft · 4 series listed
Jabiru 783 aircraft · 3 series listed
Garrett (Honeywell) 694 aircraft · 1 series listed
Jacobs 643 aircraft · 3 series listed
Austro Engine 572 aircraft · 3 series listed
Safran 461 aircraft · 2 series listed
Volkswagen (converted) 374 aircraft · 1 series listed
Subaru (converted) 349 aircraft · 1 series listed
Fairchild (Ranger) 292 aircraft · 1 series listed
GE Honda Aero Engines 211 aircraft · 1 series listed
Superior Air Parts 202 aircraft · 1 series listed
CubCrafters 192 aircraft · 1 series listed
Wright 185 aircraft · 1 series listed
Vedeneyev 174 aircraft · 1 series listed
BMW Rolls-Royce 163 aircraft · 1 series listed
Kinner 157 aircraft · 1 series listed
HKS 155 aircraft · 1 series listed
Warner 150 aircraft · 1 series listed
Titan (Continental) 128 aircraft · 1 series listed
Source: FAA Civil Aviation Registry, Releasable Aircraft Database, November 6, 2026. The FAA codes most engines at the level of a series rather than the exact variant, and leaves the code blank for about one aircraft in eight; aircraft with no engine (gliders, balloons) and amateur-built aircraft with an unlisted engine are not counted here.