Lycoming IO-320 series
1,707 aircraft on the U.S. register carry a Lycoming IO-320 series engine, rated at about 150 horsepower. The Piper PA-30 Twin Comanche is the model most often fitted with it (808 aircraft). The aircraft carrying it were built between 1956 and 2025.
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 IO-320 series. FAA spelling: IO-320 SERIES.
Fitted to model families
Piper PA-30 Twin Comanche · Bellanca 7 Citabria · Champion 7 Citabria and Champ · Bellanca 8 Decathlon and Scout · Piper PA-39 Twin Comanche C/R · Cessna 172 Skyhawk · Piper PA-28 Cherokee, Warrior, Archer and Arrow · Piper PA-18 Super Cub · Piper PA-22 Tri-Pacer and Colt · Pitts Special S-1
Where they are owner's state
Kind of aircraft
When the aircraft were built by decade
What the FAA has certified, ordered and been told about the Lycoming IO-320 series the component layer
The design is held under 1 type certificate (1E12, held by Lycoming Engines). The FAA has issued 30 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 43 failure reports with the FAA since 1995, 8 of them in the last ten years.
FAA orders 30 airworthiness directives · newest first
Failure reports 43 since · what operators and shops told the FAA
Parts most often reported as the reports name them
Latest reports
Certificates and bulletins
Safety bulletins 9 · advice, not orders
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
- Piper PA-30 Twin Comanche 808 with this engine series
- Bellanca 7 Citabria 185 with this engine series
- Champion 7 Citabria and Champ 135 with this engine series
- Bellanca 8 Decathlon and Scout 124 with this engine series
- Piper PA-39 Twin Comanche C/R 68 with this engine series
- Cessna 172 Skyhawk 26 with this engine series
- Piper PA-28 Cherokee, Warrior, Archer and Arrow 15 with this engine series
- Piper PA-18 Super Cub 8 with this engine series
- Texas 153 of these aircraft
- Florida 146 of these aircraft
- California 144 of these aircraft
- Georgia 71 of these aircraft
- Delaware 59 of these aircraft
- Southern Aircraft Consultancy INC Trustee 9 of these aircraft
- International Air Services INC Trustee 7 of these aircraft
- Plane Fun INC Tr Trustee 4 of these aircraft
- Collum Aviation LLC 4 of these aircraft
- Bas Part Sales LLC 4 of these aircraft
- FAA orders naming the Lycoming IO-320 series 30 airworthiness directives
- Failure reports on the Lycoming IO-320 series 43 reports since 1995
These connections as data: /graph/engine/lycoming-io-320-series.json · about the eFlight graph.
Aircraft newest certificates first · 1,707
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N8031X | Runyan Paul L RV6A |
Fixed-wing, single engine | Individual owner Washington |
Experimental | PendingFAA registration status code R: Registration pending. All codes | |
| N8085Y | Piper PA-30 |
Fixed-wing, multi-engine | Individual owner Tennessee |
Standard | PendingFAA registration status code R: Registration pending. All codes | |
| N8137Y | Piper PA-30 |
Fixed-wing, multi-engine | Individual owner Minnesota |
Standard | Sale reportedFAA registration status code 7. All codes | |
| N8268Y | Piper PA-30 |
Fixed-wing, multi-engine | Bas Part Sales LLC Greeley, Colorado |
Standard | ValidFAA registration status code V: Valid registration. All codes | |
| N8339Y | Piper PA-30 |
Fixed-wing, multi-engine | Bas Part Sales LLC Greeley, Colorado |
Standard | ValidFAA registration status code V: Valid registration. All codes | |
| N8644V | Bellanca 7KCAB |
Fixed-wing, single engine | Individual owner Iowa |
Standard | Sale reportedFAA registration status code 7. All codes | |
| N8807Y | Piper PA-30 |
Fixed-wing, multi-engine | Rich Lucas Aircraft Sales LLC Lincoln Park, New Jersey |
Standard | 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 7, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.