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

Continental IO-520-K

8 aircraft on the U.S. register carry a Continental IO-520-K engine, rated at about 300 horsepower. The Bellanca 17 Viking is the model most often fitted with it (8 aircraft). The aircraft carrying it were built between 1970 and 1976.

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-K. FAA spelling: IO-520-K.

Fitted to model families

Bellanca 17 Viking8

Bellanca 17 Viking

Where they are owner's state

Pennsylvania1Oklahoma1Maryland1Louisiana1Georgia1Florida1Colorado1Arizona1

Kind of aircraft

Piston singles8 (100%)

When the aircraft were built by decade

0246881970

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

The design is held under 1 type certificate (E5CE, held by Continental Aerospace Technologies, INC.). The FAA has issued 31 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 14 failure reports with the FAA since 1995, 5 of them in the last ten years.

FAA orders 31 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 IO-520-K

Failure reports 14 since · what operators and shops told the FAA

012349798990004060710215

Parts most often reported as the reports name them

Guide2Chain1Crankshaft1Cylinder1Cylinder Head1Exhaust Valve1Leg Assy1Magneto1Rod End1Shuttle Valve1

Latest reports

2015-12-08Leg Assy: cracked
2015-01-23Chain: detached
2010-07-30Rod End: failed
2007-06-24Shuttle Valve: malfunctioned
2006-12-25Crankshaft: broken

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
Airworthiness

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

Aircraft newest certificates first · 8

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N868CT Bellanca
17-30A
Fixed-wing, single engine Co-owned owner
Colorado
Standard 2025-05-07 ValidFAA registration status code V: Valid registration. All codes
N9606E Bellanca
17-30A
Fixed-wing, single engine Neighborhood Helping Hands LLC
Mesa, Arizona
Standard 2024-09-19 ValidFAA registration status code V: Valid registration. All codes
N376CW Bellanca
17-30A
Fixed-wing, single engine Weavers Enterprises LLC
Annville, Pennsylvania
Standard 2022-12-09 ValidFAA registration status code V: Valid registration. All codes
N14764 Bellanca
17-30A
Fixed-wing, single engine Bl14764 LLC
Homer, Louisiana
Standard 2022-03-10 ValidFAA registration status code V: Valid registration. All codes
N575JH Bellanca
17-30A
Fixed-wing, single engine Co-owned owner
Oklahoma
Standard 2018-01-18 ValidFAA registration status code V: Valid registration. All codes
N14732 Bellanca
17-30A
Fixed-wing, single engine Individual owner
Georgia
Standard 2017-05-19 ValidFAA registration status code V: Valid registration. All codes
N9521E Bellanca
17-30A
Fixed-wing, single engine Individual owner
Maryland
Standard 2016-08-04 ValidFAA registration status code V: Valid registration. All codes
N6601V Bellanca
17-30A
Fixed-wing, single engine Jofredo CORP
Zephyrhills, Florida
Standard 2011-07-28 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.