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

Continental IO-520-MB

8 aircraft on the U.S. register carry a Continental IO-520-MB engine, rated at about 285 horsepower. The Cessna 310 is the model most often fitted with it (8 aircraft). The aircraft carrying it were built between 1975 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 IO-520-MB. FAA spelling: IO-520-MB.

Fitted to model families

Cessna 3108

Cessna 310

Where they are owner's state

Wyoming3New York2Minnesota1Delaware1

Kind of aircraft

Piston twins8 (100%)

When the aircraft were built by decade

024577197011980

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

The design is held under 1 type certificate (E5CE, held by Continental Aerospace Technologies, INC.). The FAA has issued 27 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 30 failure reports with the FAA since 1995, 4 of them in the last ten years.

FAA orders 27 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
2016-09-152016-16-12 · Cylinder assemblies · engine
2014-04-252014-05-29 · SAP replacement parts manufacturer approval (PMA) investment cast cylinder assemblies · engine

All orders naming the Continental IO-520-MB

Failure reports 30 since · what operators and shops told the FAA

0124595020721126

Parts most often reported as the reports name them

Bellcrank4Torque Tube4Engine2Alternator1Beam1Bracket1Connect Rod1Connecting Rod1Contactor1Diode1

Latest reports

2026-05-27Alternator: inoperative
2024-04-29Muffler: separated
2021-06-14Engine: failed
2019-01-17Bellcrank: broken
2015-02-19Seal: blew out

Certificates and bulletins

E5CEType certificate held by Continental Aerospace Technologies, INC. · 18 models listed · revised March 8, 2022

Safety bulletins 10 · 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-io-520-mb.json · about the eFlight graph.

Aircraft newest certificates first · 8

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N310AJ Cessna
310R
Fixed-wing, multi-engine Pj Aviation Holding LLC Trustee
Eden Prairie, Minnesota
Standard 2026-05-07 ValidFAA registration status code V: Valid registration. All codes
N21GB Cessna
310R
Fixed-wing, multi-engine Southern Aircraft Consultancy INC Trustee
Casper, Wyoming
Standard 2026-02-07 ValidFAA registration status code V: Valid registration. All codes
N1919J Cessna
310R
Fixed-wing, multi-engine Valiair Lc Trustee
Casper, Wyoming
Standard 2024-06-26 ValidFAA registration status code V: Valid registration. All codes
N443LT Cessna
310R
Fixed-wing, multi-engine Valiair LTD CO Trustee
Casper, Wyoming
Standard 2023-05-26 ValidFAA registration status code V: Valid registration. All codes
N444LJ Cessna
310R
Fixed-wing, multi-engine Dsl Aviation LLC
Ronkonkoma, New York
Standard 2023-04-13 ValidFAA registration status code V: Valid registration. All codes
N747YK Cessna
310R
Fixed-wing, multi-engine Yk Flight INC Trustee
Wilmington, Delaware
Standard 2020-02-11 ValidFAA registration status code V: Valid registration. All codes
N350JC Cessna
310R
Fixed-wing, multi-engine Wear On Earth Aviation LLC
Potsdam, New York
Special flight permit 2019-08-13 ValidFAA registration status code V: Valid registration. All codes
N310GG Cessna
310R
Fixed-wing, multi-engine Individual owner
Standard Sale reportedFAA registration status code 7. 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.