Continental GTSIO-520-L
16 aircraft on the U.S. register carry a Continental GTSIO-520-L engine, rated at about 375 horsepower. The Cessna 421 Golden Eagle is the model most often fitted with it (16 aircraft). The aircraft carrying it were built between 1976 and 1980.
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 Continental GTSIO-520-L. FAA spelling: GTSIO-520-L.
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 Continental GTSIO-520-L the component layer
The design is held under 1 type certificate (E7CE, held by Continental Aerospace Technologies, INC.). The FAA has issued 25 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 139 failure reports with the FAA since 1995, 18 of them in the last ten years.
FAA orders 25 airworthiness directives · newest first
Failure reports 139 since · what operators and shops told the FAA
Parts most often reported as the reports name them
Latest reports
Certificates and bulletins
Safety bulletins 5 · 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
- Cessna 421 Golden Eagle 16 with this engine series
- Delaware 5 of these aircraft
- Montana 2 of these aircraft
- Kansas 2 of these aircraft
- Texas 1 of these aircraft
- Pennsylvania 1 of these aircraft
- Aerospace Trust Management LLC Trustee 2 of these aircraft
- Sky West Aviation INC Trustee 1 of these aircraft
- Qualitair LLC Trustee 1 of these aircraft
- FAA orders naming the Continental GTSIO-520-L 25 airworthiness directives
- Failure reports on the Continental GTSIO-520-L 139 reports since 1995
These connections as data: /graph/engine/continental-gtsio-520-l.json · about the eFlight graph.
Aircraft newest certificates first · 16
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N844CK | Cessna 421C |
Fixed-wing, multi-engine | Turpin Time LLC Helena, Montana |
Standard | 2026-03-24 | ValidFAA registration status code V: Valid registration. All codes |
| N47JD | Cessna 421C |
Fixed-wing, multi-engine | Qualitair LLC Trustee Michelstadt, |
Standard | 2026-03-04 | ValidFAA registration status code V: Valid registration. All codes |
| N28WD | Cessna 421C |
Fixed-wing, multi-engine | Optio Air LLC Moore, Oklahoma |
Standard | 2025-09-12 | ValidFAA registration status code V: Valid registration. All codes |
| N421JL | Cessna 421C |
Fixed-wing, multi-engine | Wagner Distributing CO INC Auburn, California |
Standard | 2023-12-12 | ValidFAA registration status code V: Valid registration. All codes |
| N262MC | Cessna 421C |
Fixed-wing, multi-engine | Aerospace Trust Management LLC Trustee Wilmington, Delaware |
Standard | 2022-07-19 | ValidFAA registration status code V: Valid registration. All codes |
| N421MU | Cessna 421C |
Fixed-wing, multi-engine | N421Mu LLC Missoula, Montana |
Standard | 2022-04-12 | ValidFAA registration status code V: Valid registration. All codes |
| N421TC | Cessna 421C |
Fixed-wing, multi-engine | Athar Glenola LLC Mars, Pennsylvania |
Standard | 2021-09-30 | ValidFAA registration status code V: Valid registration. All codes |
| N241EW | Cessna 421C |
Fixed-wing, multi-engine | Fort Carlos LLC Fort Worth, Texas |
Standard | 2021-09-24 | ValidFAA registration status code V: Valid registration. All codes |
| N421BR | Cessna 421C |
Fixed-wing, multi-engine | Control Data INC Melbourne Beach, Florida |
Standard | 2021-01-05 | ValidFAA registration status code V: Valid registration. All codes |
| N421JR | Cessna 421C |
Fixed-wing, multi-engine | 421Jr LLC Wichita, Kansas |
Standard | 2020-12-16 | ValidFAA registration status code V: Valid registration. All codes |
| N274MB | Cessna 421C |
Fixed-wing, multi-engine | Adams Aviation Services INC Trustee Wilmington, Delaware |
Standard | 2020-12-11 | ValidFAA registration status code V: Valid registration. All codes |
| N42HM | Cessna 421C |
Fixed-wing, multi-engine | Sky West Aviation INC Trustee Albuquerque, New Mexico |
Standard | 2020-11-17 | ValidFAA registration status code V: Valid registration. All codes |
| N8401A | Cessna 421C |
Fixed-wing, multi-engine | Commercial Property Services Group LLC Wichita, Kansas |
Standard | 2018-01-16 | ValidFAA registration status code V: Valid registration. All codes |
| N421XL | Cessna 421C |
Fixed-wing, multi-engine | Locaero Services INC Trustee Wilmington, Delaware |
Standard | 2012-06-21 | ValidFAA registration status code V: Valid registration. All codes |
| N61AJ | Cessna 421C |
Fixed-wing, multi-engine | Coco Air LTD Trustee Wilmington, Delaware |
Standard | 2011-01-31 | ValidFAA registration status code V: Valid registration. All codes |
| N87PP | Cessna 421C |
Fixed-wing, multi-engine | Aerospace Trust Management LLC Trustee Wilmington, Delaware |
Standard | 2009-12-22 | 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.