The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 5, 2026

Continental TSIO-520-AE

8 aircraft on the U.S. register carry a Continental TSIO-520-AE engine, rated at about 250 horsepower. The Cessna T303 is the model most often fitted with it (8 aircraft). The aircraft carrying it were built between 1981 and 1984.

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 TSIO-520-AE. FAA spelling: TSIO-520-AE.

Fitted to model families

Cessna T3038

Cessna T303

Where they are owner's state

Oregon2Delaware2Florida1California1Alabama1

Kind of aircraft

Piston twins8 (100%)

When the aircraft were built by decade

0246881980

What the FAA has certified, ordered and been told about the Continental TSIO-520-AE the component layer

The design is held under 1 type certificate (E8CE, held by Continental Aerospace Technologies, INC.). The FAA has issued 26 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 16 failure reports with the FAA since 1995, 1 of them in the last ten years.

FAA orders 26 airworthiness directives · newest first

2023-10-262023-17-04 · Reciprocating Engine Oil System · engine
2023-03-152023-05-16 · Reciprocating Engine Power Section · engine
2023-02-232023-04-08 · Reciprocating Engine Power Section · engine
2023-02-172023-02-12 · Engine Air Intake System · engine
2022-08-152022-16-03 · Engine (RECIPROCATING) · engine
2016-09-152016-16-12 · Cylinder assemblies · engine

All orders naming the Continental TSIO-520-AE

Failure reports 16 since · what operators and shops told the FAA

01234296199201303404205107117

Parts most often reported as the reports name them

Camshaft2Line2Balance Weight1Bellcrank1Crankcase1Fork1Main Bearing1Mount1Needle1Nut1

Latest reports

2017-07-29Shaft: failed
2007-05-02Crankcase: cracked
2005-05-25Main Bearing: failed
2005-05-13Line: misinstalled
2004-11-22Camshaft: sheared

Certificates and bulletins

E8CEType certificate held by Continental Aerospace Technologies, INC. · 31 models listed · revised April 6, 2020

Safety bulletins 9 · advice, not orders

2020-04-06NE-20-05 · POWERPLANT - Engine Camshaft Gear Tooth Fracture
2018-06-20NE-18-16 · POWERPLANT Alternator Drive Coupling
2017-05-10NE-17-11 · POWERPLANT Engine damage as a result of kickback
2016-03-08NE-16-13 · Powerplant - Prohibited use of sealant
2013-02-08NE-13-15 · Engine Controls: Continental Motors, Inc. (CMI) Throttle and Mixture Control Levers

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
Where they are
Biggest operators
Airworthiness

These connections as data: /graph/engine/continental-tsio-520-ae.json · about the eFlight graph.

Aircraft newest certificates first · 8

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N954JC Cessna
T303
Fixed-wing, multi-engine Skyline Aviation Services LLC
Miramar, Florida
Standard 2025-12-30 ValidFAA registration status code V: Valid registration. All codes
N4725C Cessna
T303
Fixed-wing, multi-engine Continental Aerospace Technologies INC
Mobile, Alabama
Experimental 2025-07-11 ValidFAA registration status code V: Valid registration. All codes
N303WA Cessna
T303
Fixed-wing, multi-engine Infinite Air Center LLC
Albany, Oregon
Standard 2024-11-01 ValidFAA registration status code V: Valid registration. All codes
N303WW Cessna
T303
Fixed-wing, multi-engine Qualitair LLC Trustee
Michelstadt,
Standard 2023-05-22 ValidFAA registration status code V: Valid registration. All codes
N609DS Cessna
T303
Fixed-wing, multi-engine Tj Air Holdings INC
Wilmington, Delaware
Standard 2022-04-08 ValidFAA registration status code V: Valid registration. All codes
N217ME Cessna
T303
Fixed-wing, multi-engine Air Research Ca INC
Torrance, California
Standard 2017-03-29 ValidFAA registration status code V: Valid registration. All codes
N303MB Cessna
T303
Fixed-wing, multi-engine N303Mb CORP Trustee
Wilmington, Delaware
Standard 2016-03-04 ValidFAA registration status code V: Valid registration. All codes
N700KB Cessna
T303
Fixed-wing, multi-engine California Oregon Development LLC
Portland, Oregon
Standard 2012-06-12 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.