Lycoming O-540-B2B5
27 aircraft on the U.S. register carry a Lycoming O-540-B2B5 engine, rated at about 235 horsepower. The Piper PA-25 Pawnee is the model most often fitted with it (18 aircraft). The aircraft carrying it were built between 1962 and 2023.
The FAA records engines by code, usually at the level of a series ("O-320 series") rather than the exact variant; this page gathers every FAA code that reads as Lycoming O-540-B2B5. FAA spelling: O-540-B2B5.
Fitted to model families
Piper PA-25 Pawnee18Piper PA-28 Cherokee, Warrior, Archer and Arrow2Aero Commander CALLAIR A-91Brinkmeyer Jay C RV 101Callair A-91Eaa 484 CALAVAIR1Huismann Lucas A BEARHAWK 4 PLACE1Malecha Curtis BEARHAWK1Reeves Ray STARDUSTER SA3001
Piper PA-25 Pawnee · Piper PA-28 Cherokee, Warrior, Archer and Arrow · Aero Commander CALLAIR A-9 · Brinkmeyer Jay C RV 10 · Callair A-9 · Eaa 484 CALAVAIR · Huismann Lucas A BEARHAWK 4 PLACE · Malecha Curtis BEARHAWK · Reeves Ray STARDUSTER SA300
Where they are owner's state
Connecticut4Florida3Tennessee2Illinois2Alabama2Wisconsin1Virginia1Pennsylvania1Oklahoma1New York1
Kind of aircraft
Piston singles27 (100%)
When the aircraft were built by decade
What the FAA has certified, ordered and been told about the Lycoming O-540-B2B5 the component layer
The design is held under 1 type certificate (E-295, held by Lycoming Engines). The FAA has issued 24 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 9 failure reports with the FAA since 1995, 1 of them in the last ten years.
FAA orders 24 airworthiness directives · newest first
2026-09-142026-17-10 · Reciprocating Engine Cylinder Section · engine
2026-04-082026-04-11 · Engine (Reciprocating) · engine
2024-12-052024-21-02 · Engine (Reciprocating) · engine
2012-10-242012-19-01 · Crankshafts · engine
2012-03-272012-03-07 · Carburetor · engine
2008-10-202008-19-05 · Parallel Valve'' reciprocating engines · engine
Failure reports 9 since · what operators and shops told the FAA
Parts most often reported as the reports name them
Capacitor1Condenser1Connecting Rod1Contact1Gasket1Impulse Coupling1Rod Bolt1Trim Tab1Wheel1
Latest reports
2019-02-07Capacitor: failed
2006-06-12Contact: broken
2006-04-13Connecting Rod: galled
2003-05-20Impulse Coupling: failed
2000-08-14Gasket: inadequate
Certificates and bulletins
E-295Type certificate held by Lycoming Engines · 47 models listed · revised April 30, 2013
Safety bulletins 6 · advice, not orders
2019-05-02NE-19-08 · Reciprocating Engine Cylinder Section - Lycoming Engines Parallel Valve Cylinders
2016-05-13NE-08-32R1 · Propeller Governor Idler Gear Shaft Set Screw
2014-03-24NE-14-13 · Reciprocating Engine - Cylinder Mounting Studs
2012-11-21NE-13-06 · Pushrod Shroud Spring Retainers, Engine Components Part No. AEL14995, for Lycoming Engines 320,...
2008-09-10NE-06-32R1 · Reciprocating Engine - Crankshaft
Sources: the FAA's type certificate data sheets, airworthiness directives, supplemental type certificates, special conditions and special airworthiness information bulletins (Dynamic Regulatory System), and the FAA's service difficulty reports. A failure report is what an operator or repair station chose to file; the counts show reporting as much as reliability, and larger and commercial fleets report more. How the systems are grouped.
Connections how this engine series links to the rest of the register
Fitted to
- Piper PA-25 Pawnee 18 with this engine series
- Piper PA-28 Cherokee, Warrior, Archer and Arrow 2 with this engine series
- Aero Commander CALLAIR A-9 1 with this engine series
- Callair A-9 1 with this engine series
Where they are
- Connecticut 4 of these aircraft
- Florida 3 of these aircraft
- Tennessee 2 of these aircraft
- Illinois 2 of these aircraft
- Alabama 2 of these aircraft
Biggest operators
- Simmons Aviation Services LLC 4 of these aircraft
- Chilhowee Soaring Association INC 2 of these aircraft
- Windy City Soaring Association 1 of these aircraft
Airworthiness
- FAA orders naming the Lycoming O-540-B2B5 24 airworthiness directives
- Failure reports on the Lycoming O-540-B2B5 9 reports since 1995
Analytics
These connections as data: /graph/engine/lycoming-o-540-b2b5.json · about the eFlight graph.
Aircraft newest certificates first · 27
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N6868Z | Piper PA-25-235 |
Fixed-wing, single engine | C-Fleet LLC Missoula, Montana |
Restricted | 2025-08-05 | ValidFAA registration status code V: Valid registration. All codes |
| N6462Z | Piper PA-25 |
Fixed-wing, single engine | Minden Soaring Club INC Minden, Nevada |
Restricted | 2025-02-03 | ValidFAA registration status code V: Valid registration. All codes |
| N7663Z | Piper PA-25-235 |
Fixed-wing, single engine | Co-owned owner Oklahoma |
Restricted | 2024-01-11 | ValidFAA registration status code V: Valid registration. All codes |
| N4468Y | Piper PA-25-235 |
Fixed-wing, single engine | Individual owner Alabama |
Standard | 2023-03-10 | ValidFAA registration status code V: Valid registration. All codes |
| N274LC | Huismann Lucas A BEARHAWK 4 PLACE |
Fixed-wing, single engine | Individual owner Wisconsin |
Experimental | 2022-12-07 | ValidFAA registration status code V: Valid registration. All codes |
| N4114K | Piper PA-25-235 |
Fixed-wing, single engine | North Florida Soaring Society INC Jacksonville, Florida |
Standard | 2022-08-29 | ValidFAA registration status code V: Valid registration. All codes |
| N699RB | Piper PA-28-235 |
Fixed-wing, single engine | Individual owner New York |
Standard | 2022-02-10 | ValidFAA registration status code V: Valid registration. All codes |
| N8846L | Piper PA-25-235 |
Fixed-wing, single engine | N8846L LLC Homestead, Florida |
Standard | 2021-10-08 | ValidFAA registration status code V: Valid registration. All codes |
| N4495Y | Piper PA-25-235 |
Fixed-wing, single engine | Merlin Soaring Association INC Amelia Court House, Virginia |
Standard | 2019-12-19 | ValidFAA registration status code V: Valid registration. All codes |
| N6719Z | Piper PA-25-235 |
Fixed-wing, single engine | Journeys Aviation INC Boulder, Colorado |
Restricted | 2019-03-23 | ValidFAA registration status code V: Valid registration. All codes |
| N433RV | Brinkmeyer Jay C RV 10 |
Fixed-wing, single engine | Individual owner Pennsylvania |
Experimental | 2019-02-09 | ValidFAA registration status code V: Valid registration. All codes |
| N628P | Reeves Ray STARDUSTER SA300 |
Fixed-wing, single engine | Southern Biplanes INC Cartersville, Georgia |
Experimental | 2017-08-29 | ValidFAA registration status code V: Valid registration. All codes |
| N7366Z | Piper PA-25-235 |
Fixed-wing, single engine | Aerial Banners North INC Pembroke Pines, Florida |
Standard | 2017-07-24 | ValidFAA registration status code V: Valid registration. All codes |
| N8588W | Piper PA-28-235 |
Fixed-wing, single engine | Individual owner Alaska |
Standard | 2016-11-03 | ValidFAA registration status code V: Valid registration. All codes |
| N6518Z | Piper PA-25-235 |
Fixed-wing, single engine | Simmons Aviation Services LLC Pawcatuck, Connecticut |
Standard | 2015-10-13 | ValidFAA registration status code V: Valid registration. All codes |
| N7714Z | Piper PA-25-235 |
Fixed-wing, single engine | Simmons Aviation Services LLC Pawcatuck, Connecticut |
Standard | 2015-10-13 | ValidFAA registration status code V: Valid registration. All codes |
| N35FA | Piper PA-25-235 |
Fixed-wing, single engine | Individual owner Missouri |
Multiple | 2015-04-28 | ValidFAA registration status code V: Valid registration. All codes |
| N6862Z | Piper PA-25-235 |
Fixed-wing, single engine | Simmons Aviation Services LLC Pawcatuck, Connecticut |
Standard | 2012-09-17 | ValidFAA registration status code V: Valid registration. All codes |
| N132CL | Malecha Curtis BEARHAWK |
Fixed-wing, single engine | Individual owner Minnesota |
Experimental | 2011-11-17 | ValidFAA registration status code V: Valid registration. All codes |
| N7282Z | Piper PA-25-235 |
Fixed-wing, single engine | Simmons Aviation Services LLC Pawcatuck, Connecticut |
Standard | 2009-10-21 | ValidFAA registration status code V: Valid registration. All codes |
| N8403V | Aero Commander CALLAIR A-9 |
Fixed-wing, single engine | Individual owner Arizona |
Standard | 2007-08-27 | ValidFAA registration status code V: Valid registration. All codes |
| N8279H | Callair A-9 |
Fixed-wing, single engine | Chilhowee Soaring Association INC Benton, Tennessee |
Restricted | 2006-09-28 | ValidFAA registration status code V: Valid registration. All codes |
| N484ML | Eaa 484 CALAVAIR |
Fixed-wing, single engine | Individual owner California |
Experimental | 2006-08-11 | ValidFAA registration status code V: Valid registration. All codes |
| N4513Y | Piper PA-25-235 |
Fixed-wing, single engine | Individual owner Alabama |
Restricted | 2006-08-01 | ValidFAA registration status code V: Valid registration. All codes |
| N2399U | Piper PA-25-235 |
Fixed-wing, single engine | Chilhowee Soaring Association INC Benton, Tennessee |
Restricted | 2005-03-22 | ValidFAA registration status code V: Valid registration. All codes |
| N6523Z | Piper PA-25-235 |
Fixed-wing, single engine | Windy City Soaring Association Hinckley, Illinois |
Standard | 2004-05-05 | ValidFAA registration status code V: Valid registration. All codes |
| N4428P | Piper PA-25-235 |
Fixed-wing, single engine | Silver Creek Glider Club New Douglas, Illinois |
Standard | 2000-10-12 | ValidFAA registration status code V: Valid registration. All codes |
Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 5, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.