# Service difficulty reports: Continental IO-470-N A list on [Continental IO-470-N](https://openairdocs.org/engine/continental-io-470-n.md). Newest first. General aviation reporting is voluntary. - [SDR 2026FA0000783](https://openairdocs.org/sdr/2026FA0000783.md): Spark Plug · separation · Sep 23, 2026 · N1721G · Beech P35 · Spark Plug/Igniter > DURING CRUISE FLIGHT, THE AIRCRAFT EXPERIENCED AN IMMEDIATE PARTIAL LOSS OF ENGINE POWER ACCOMPANIED BY SEVERE ENGINE ROUGHNESS. AN EMERGENCY WAS DECLARED, AND THE AIRCRAFT LANDED SAFELY WITHOUT FURTHER INCIDENT. POST-FLIGHT MAINTENANCE INSPECTION REVEALED THA - [SDR 2019FA0000248](https://openairdocs.org/sdr/2019FA0000248.md): Stop Pin · backed out · Aug 12, 2019 · N9402S · Beech 35C33 · Engine Fuel and Control > THE FULL RICH STOP PIN ON FUEL INJECTION CONTROL ASSEMBLY (PN 629904-2A11) BACKED COMPLETELY OUT AFFECTING THE MIXTURE WHEN THE MIXTURE CONTROL WAS IN THE FULL RICH POSITION. THE RESULT WAS REDUCED POWER AT FULL THROTTLE THAT WAS RECOVERED BY ADJUSTING THE MIX - [SDR 2020FA0000038](https://openairdocs.org/sdr/2020FA0000038.md): Tachometer · grounded · Aug 9, 2019 · N7900D · Beech H35 · Engine RPM Indicating System > DIGITAL TACHOMETER GROUND OUT BOTH MAGNETOS WHEN RUNNING AIRCRAFT. CONTACTED MANUFACTURER AND GO NO HELP WITH THEIR UNIT. - [SDR 2016FA0000320](https://openairdocs.org/sdr/2016FA0000320.md): Engine · failed · Jul 5, 2016 · N112MB · Beech P35 · Engine (Reciprocating) > ENGINE FAILURE DURING FLIGHT. ACFT CRASHED INTO THE OCEAN NEAR AIRPORT. NTSB INVESTIGATION ONGOING TO DETERMINE CAUSE OF ENGINE FAILURE. ENGINE SENT TO MFG FOR EVALUATION. - [SDR 2015FA0000059](https://openairdocs.org/sdr/2015FA0000059.md): Piston · broken · Oct 27, 2014 · N5878S · Beech 35C33 · Reciprocating Engine Power Section > DURING AN ANNUAL INSPECTION, THE QUICK DRAIN OIL DRAIN VALVE WOULD NOT LOCK OPEN. A BLOCK OF WOOD WAS USED TO WEDGE UNDER THE DRAIN VALVE TO HOLD IT OPEN. AFTER THE OIL WAS DRAINED, THE VALVE WAS REMOVED AND THE VALVE LOCKED OPEN NORMALLY. LOOKED UP INTO TH - [SDR 2010FA0000995](https://openairdocs.org/sdr/2010FA0000995.md): Piston · broken · Jun 7, 2010 · N931B · Beech N35 · Reciprocating Engine Power Section > 1.8 HOURS AND ON SECOND FLIGHT AFTER INSTALLATION OF 6 NEW PISTONS PN AEC648029 WITH 6 REWORKED CYLINDER ASSEMBLIES, THE ENG EXPERIENCED A CATASTROPHIC TOTAL ENG FAILURE, MINUTES AFTER TAKEOFF DEPARTURE FROM AIRPORT. POST INCIDENT INVESTIGATION FOUND NR 2 CON - [SDR 2010FA0000661](https://openairdocs.org/sdr/2010FA0000661.md): Gasket · failed · May 17, 2010 · N8615M · Beech P35 · Reciprocating Engine Oil System > OIL COOLER GASKET FAILED. - [SDR 2007FA0000483](https://openairdocs.org/sdr/2007FA0000483.md): Unknown · unknown · May 25, 2007 · N6061E · Beech K35 · Electrical Power System > LOST ELECTRICAL POWER. - [SDR CA050729001](https://openairdocs.org/sdr/CA050729001.md): Rib · corroded · Jul 28, 2005 · Beech N35 · Horizontal Stabilizer Structure > (CAN) RT STABILIZER END RIB FOUND TO HAVE INTERGRANULAR CORROSION WHERE IT ATTACHED TO THE FORWARD RIB. CORROSION IS ON THE UPPER INSIDE CORNER OF THE RIB AND ONLY CAN BE VIEWED USING SMALL MIRROR THRU THE LIGHTENING HOLE OF THIS RIB JUST IB OF THE RUDDERVATO - [SDR CA050729002](https://openairdocs.org/sdr/CA050729002.md): Rib · corroded · Jul 28, 2005 · Beech N35 · Horizontal Stabilizer Structure > (CAN) LT STABILIZER END RIB FOUND TO HAVE INTERGRANULAR CORROSION WHERE IT ATTACHED TO THE FORWARD RIB. CORROSION IS ON THE UPPER INSIDE CORNER OF THE RIB AND ONLY CAN BE VIEWED USING SMALL MIRROR THRU THE LIGHTENING HOLE OF THIS RIB JUST IB OF THE RUDDERVATO - [SDR 2003FA0001005](https://openairdocs.org/sdr/2003FA0001005.md): Adapter · worn · Sep 5, 2003 · N866P · Beech 35C33 · Reciprocating Engine Oil System > ENGINE DEVELOPED OIL LEAK, FOUND THIS ADAPTER LEAKING AT THREADS, LOCKING NUT SAFETY WAS INTACT, TORQUE DOPE WAS INTACT. ALL REQUIREMENTS OF AD 96-12-22 WERE MET AS PREVIOUSLY INSPECTED 18 HOURS BEFORE FAILURE. - [SDR CA000804011](https://openairdocs.org/sdr/CA000804011.md): Stator · broken · Jul 23, 2000 · Beech P35 · DC Generator-Alternator > (CAN) TWO LEGS OF STATOR WINDING BROKE AT DIODE PLATE. RESULTS NO ALTERNATOR OUTPUT. (X) - [SDR CA000118025](https://openairdocs.org/sdr/CA000118025.md): Fitting · cracked · Jan 10, 2000 · Beech P35 · Landing Gear Steering System > (CAN) DURING 100 HR INSPECTION, THE RT TORQUE FITTING WAS FOUND CRACKED AT THE ROD ATTACH POINT. POSSIBLE CAUSE IS THAT THE NOSE GEAR WAS OVER-STEERED AND THE STEERING STOPS WERE NOT ADJUSTED PROPERLY AND THAT MAY HAVE PUT EXCESSIVE FORCE ON THE FITTING CAUSI - [SDR AU990861](https://openairdocs.org/sdr/AU990861.md): Spar · corroded · Jul 7, 1999 · Beech N35 · Wing Spar > (AUS) LEFT WING SPAR CAP CONTAINED SEVERE INTERGRANULAR CORROSION ON THE VERTICAL FLANGE. - [SDR AU961159](https://openairdocs.org/sdr/AU961159.md): Seat Belt · wrong part · Aug 8, 1996 · Beech P35BEECH · Flight Compartment Equipment > (AUS) SEAT BELT HARDWARE AND WEBBING WAS OF AUTOMOTIVE ORIGIN - UNAPPROVED PART - PERSONNEL/MAINTENANCE ERROR - [SDR 95ZZZX6932](https://openairdocs.org/sdr/95ZZZX6932.md): Bolt · failed · Sep 27, 1995 · Reciprocating Engine Power Section > CRANKCASE THROUGH-BOLT WAS TORQUED TO THE MANUFACTURER'S SPECIFICATIONS. THE NEXT DAY, FOUND IT IN TWO PIECES. SUBMITTER STATED THIS IS THE SECOND NEW BOLT TO DO THIS. BROKE AT O-RING GROOVE. - [SDR 95ZZZX5639](https://openairdocs.org/sdr/95ZZZX5639.md): Through-Bolt · broke · Aug 21, 1995 · Reciprocating Engine Power Section > NEW THROUGH-BOLT BROKE AFTER TORQUED TO 67 FEET/POUND. BROKE AT O-RING GROOVE IN CENTER OF BOLT. SUBMITTER SUSPECTS POSSIBLE HYDROGEN EMBRITTLEMENT FROM PLATING. ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet' WHERE engine_model_key = 'IO470N' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/engine/continental-io-470-n/reports --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.