# Service difficulty reports: Continental C90-12F A list on [Continental C90-12F](https://openairdocs.org/engine/continental-c90-12f.md). Newest first. General aviation reporting is voluntary. - [SDR CA100914004](https://openairdocs.org/sdr/CA100914004.md): Steering Sys · misinstalled · Sep 14, 2010 · Piper PA11 · Rudder Control System > DURING INSP OF THE RUDDER ASSY. WHILE ACFT WAS DISASSEMBLED FOR O/H, IT WAS FOUND THAT DURING PREVIOUS REPLACEMENT OF ACFT FABRIC, BOLTS ATTACHING THE RUDDER STEERING ARM CASTING TO THE RUDDER ASSY HAD BEEN REMOVED TO FACILITATE THE INSTALLATION OF THE NEW FA - [SDR 2006FA0000819](https://openairdocs.org/sdr/2006FA0000819.md): Exhaust Valve · broken · Jul 9, 2006 · N4715E · Bbavia 7EC · Reciprocating Engine Cylinder Section > WHEN THE NR 4 CYLINDER WAS REMOVED, THE EXHAUST VALVE HEAD WAS FOUND TO BE BROKEN OFF, ABOUT.5 INCH FROM THE FACE OF THE VALVE, CAUSING FAILURE OF THE PISTON AND FAILURE OF THE INTAKE VALVE. THE CIRCUMSTANCES OF THE FAILURE CAUSED A LOSS OF ENGINE POWER AND - [SDR CA050504004](https://openairdocs.org/sdr/CA050504004.md): Interphone · intermittent · Apr 24, 2005 · Bbavia 7DC · Interphone/Passenger Announcement (PA) System > (CAN) RADIO WAS INTERMITTENT. A 2 PLACE PORTABLE INTERCOM WAS BEING USED. PILOTS RT KNEE WAS RESTING AND PULLING ON THE POWER CABLE. THE POWER CABLE IS EQUIPPED WITH A LIGHTER PLUG ADAPTER. THE PULL ON THE CABLE WOULD CAUSE THE LIGHTER PLUG TO COME LOOSE, WHE - [SDR CA020722013](https://openairdocs.org/sdr/CA020722013.md): Spar · cracked · Jun 30, 2002 · Bbavia 7EC · Wing Spar > (CAN) ALL 4 SPARS REPLACED DUE TO SMALL CRACKS AT NAIL HOLES, EDGE OF PLYWOOD REINFORCING AS A PRECAUTIONARY MEASURE. NO LARGE CRACKS FOUND.4 NEW METAL SPARS INSTALLED. - [SDR 474](https://openairdocs.org/sdr/474.md): Spar · cracked · Apr 24, 2002 · N4351C · Bbavia 7EC · Wing Spar > C/W AD 00-25-02R1 FOUND CRACK AT BUTT OF MAIN SPAR JUST UNDER ATTACH FITTING TO FUSELAGE ON R/H WING TRAVELING SEVERAL INCHES LONGITUDINALLY AND PARALLEL- SEVERAL RIB NAILS LOOSE ON BOTH WINGS- AIRCRAFT HANGARED FOR SEVERAL YEARS (20)VERY LOW USEAGE- CAUSE UNK - [SDR CA010628043](https://openairdocs.org/sdr/CA010628043.md): Spar · cracked · May 20, 2001 · Bbavia 7CCM · Wing Spar > (CAN) TO CARRY OUT AD 2000-25-02, ADDITIONAL HOLES WERE CUT IN EACH LOWER WING PANEL. NO PROBLEMS WERE FOUND. REMOVED WING ROOT FAIRINGS AND FABRIC ON TOP OF BOTH WINGS JUST TO BE SURE IN WING ROOT AREA. FOUND BOTH FWD SPAR ROOT ATTACH POINTS CRACKED AT THE EN - [SDR 20010509CW009](https://openairdocs.org/sdr/20010509CW009.md): Spar · cracked · Apr 13, 2001 · N62667 · Bbavia 7EC · Wing Spar > IN RECOVERING AIRFRAME, FOUND CRACK IN RIGHT WING REAR SPAR. AIRCRAFT WRECKED IN A NOSE OVER. NO LOG RECORD OF REPAIR TO REAR SPAR. - [SDR 20010223CW001](https://openairdocs.org/sdr/20010223CW001.md): Spar · cracked · Jan 17, 2001 · N1205E · Bbavia 7AC · Wing Spar > DURING INSPECTION, CRACK FOUND ORIGINATING FROM RIB NAIL RUNNING HORIZONTAL. SPAR INSTALLED 5/17/59 - [SDR 99ZZZX4253](https://openairdocs.org/sdr/99ZZZX4253.md): Engine · malfunctioned · Oct 1, 1999 · N3797V · Cessna 140A · Engine (Reciprocating) > ENGINE LOST POWER. AIRCRAFT UPSIDE DOWN IN CORN FIELD FOR 3 DAYS. FLIPPED AIRCRAFT OVER, DISMANTLED, AND HAULED BACK TO AIRPORT (PTK). DIALED CRANKSHAFT, OK. INSTALLED USED SERVICEABLE PROPELLER. HOOKED UP AUXILIARY FUEL TANK TO LEFT WING. STARTED ENGINE - [SDR CA990413014](https://openairdocs.org/sdr/CA990413014.md): Control Rod · corroded · Mar 22, 1999 · Univar F1A · Aileron Control System > (CAN) INTERNAL CORROSION OF CONTROL RODS WAS FOUND. THE AILERON CONTROL ROD (RT) WAS CORRODED THROUGH AT ROD-END INBOARD TO ATTACHMENT LUG AT AILERON BELLCRANK. (WING ROOT AREA). PN F-52036 EXTERNAL CORROSION OF 50 PERCENT OF WALL THICKNESS WAS FOUND ON BOT - [SDR 99ZZZX180](https://openairdocs.org/sdr/99ZZZX180.md): Gear · broken · Nov 29, 1998 · N99597 · Univar 415C · Magneto/Distributor > LEFT MAGNETO FAILED DURING PRE-TAKEOFF MAG CHECK. THREE TEETH ON LT MAG DRIVE GEAR MISSING. DURING REMOVAL OF OIL TANK, ACCESSORIES, AND ACCESSORY DRIVE CASE, ONE TOOTH WAS FOUND IN OIL TANK, TWO TEETH IN ACCY DRIVE CASE. BOTH MAGNETOS WITH DRIVE GEARS SENT - [SDR CA980504018](https://openairdocs.org/sdr/CA980504018.md): Turnbuckle · cracked · Apr 29, 1998 · Piper J3C65 · Aileron Control System > (CAN) ONE INCH CRACK IN TURNBUCKLE BARREL STARTING FROM LT THREAD END. REPLACED. - [SDR CA970811007](https://openairdocs.org/sdr/CA970811007.md): Plug Piston Pin · worn · Jul 31, 1997 · Luscom 8F · Reciprocating Engine Cylinder Section > (CAN) PISTON PIN PLUG IN NR2 CYLINDER CAME LOOSE AND CAUSED WEAR ON THE CYLINDER WALL. METAL WAS FOUND IN THE OIL FILTER. ALL CYLINDERS WERE REMOVED FOR INSPECTION. - [SDR 96ZZZX4623](https://openairdocs.org/sdr/96ZZZX4623.md): Needle Valve · swelled up · Aug 1, 1996 · Cessna 140 · Fuel Control/Reciprocating Engines > CARBURETOR FLOAT CHAMBER NEEDLE VALVE TIP SWELLED UP, PROBABLY DUE TO 100 LL OR AUTOGAS. ENGINE FALTERED AT HIGH POWER SETTINGS. TAKEOFF ABORTED. - [SDR CA960923012](https://openairdocs.org/sdr/CA960923012.md): Piston · cracked · Jul 15, 1996 · Cessna 140 · Reciprocating Engine Cylinder Section > (CAN) DURING THE ANNUAL AIRCRAFT INSPECTION THE #2 CYLINDER COMPRESSION CHECK WAS LOW AT 43/80. UPON REMOVAL OF THE CYLINDER, THE PISTON WAS FOUND CRACKED IN TWO PLACES ON THE WRIST PIN BOSSES. A NEW CYLINDER AND PISTON WILL BE INSTALLED. - [SDR 95ZZZX6773](https://openairdocs.org/sdr/95ZZZX6773.md): Crankshaft · broke · Nov 1, 1995 · N720CU · Cessna 140 · Engine (Reciprocating) > CRANKSHAFT BROKE BETWEEN FIRST AND SECOND ROD THROW. TOTAL TIME SINCE NEW, 129.8 HOURS. - [SDR 95ZZZX6407](https://openairdocs.org/sdr/95ZZZX6407.md): Guide · excess worn · Oct 16, 1995 · N4565M · Piper PA11 · Reciprocating Engine Cylinder Section > OWNER REPORTED EXCESSIVE BLOW-BY. COMPRESSION CHECK NR 2 - 52/80 AND NR 4 - 50/80. EXHAUST VALVES LEAKING. PISTONS HEAVY WITH CARBON BUILD-UP. EXHAUST GUIDES WORN BEYOND TCM LIMITS. SUBMITTER STATES THIS IS 4 OUT 10 CYLINDERS INSTALLED, ALL WITH LESS THAN - [SDR 95ZZZX505](https://openairdocs.org/sdr/95ZZZX505.md): Engine · malfunctioned · Jan 1, 1995 · N70548 · Piper J3C65 · Engine (Reciprocating) > ENGINE POWER FAILURE DURING TAKEOFF. MAINTENANCE INVESTIGATION AND POST-ENGINE RUN WAS CONDUCTED. ENGINE RAN SATISFACTORY. MAINTENANCE ADVISED, SUSPECT FUEL STARVATION DUE TO FREEZING OF WATER CONTAMINATION IN LOW SECTION OF FUEL LINE. ## 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 = 'C9012F' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/engine/continental-c90-12f/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.