# Service difficulty reports: Continental GTSIO-520-D A list on [Continental GTSIO-520-D](https://openairdocs.org/engine/continental-gtsio-520-d.md). Newest first. General aviation reporting is voluntary. - [SDR EMWC2012F00070](https://openairdocs.org/sdr/EMWC2012F00070.md): Cable · damaged · Nov 26, 2011 · N121EE · Cessna A185F · Landing Gear Retraction/Extension System > DURING CRUISE FLIGHT, AFT SKI CABLE ATTACH CLEVIS PIN CAME LOOSE. CLEVIS PIN AND DIAPER PIN HOLDING CLEVIS DEPARTED ACFT. AFT SKI CABLE CAME LOOSE AND SKI FLIPPED FORWARD AND STRUCK WING LIFT STRUT, DENTING THE STRUT. PILOT MADE A SAFE LANDING. LIFT STRUT, A - [SDR CA110804002](https://openairdocs.org/sdr/CA110804002.md): Pin · cracked · Jul 29, 2011 · Cessna 421A · Propeller Assembly > PROPELLER INSTALLED AS NEW ON AUG.8,2003. UPON ENGINE SHUTDOWN THE PROPELLER WOULD NOT LATCH AND TRAVELLED TO THE FULL FEATHER POSITION. WHEN THE CYLINDER WAS REMOVED IT WAS FOUND THAT THE LATCH PINS HAD FAILED. - [SDR CA090209001](https://openairdocs.org/sdr/CA090209001.md): Attach Bolt · cracked · Jan 23, 2009 · Cessna 421 · Wing Main, Frame Structure > THIS BOLT WAS INSPECTED DURING THE ANNUAL INSPECTION OF THIS AIRCRAFT. IT WAS VISUALLY SEEN TO HAVE WHAT LOOKED LIKE A CRACK ON THE HEAD SURFACE OF THE BOLT. THIS COULD BE MISTAKEN AS DAMAGE FROM A DRIFT OR HAMMER DONE DURING INSTALLATION. THE PART WAS REMO - [SDR 2005FA0001451](https://openairdocs.org/sdr/2005FA0001451.md): Engine · making metal · Oct 21, 2005 · N6675Q · Cessna 421B · Engine (Reciprocating) > AT INITIAL 10 HR OIL CHANGE, A LARGE AMOUNT OF WHAT APPEARS TO BE BEARING MATERIAL WAS FOUND IN THE DRAIN OIL, DRAIN PLUG, AND ON FURTHER EXAMINATION, THE OIL FILTER. ENGINE WAS REMOVED FROM SERVICE AT THIS TIME AND SENT BACK TO OVERHAUL FACILITY FOR FURTHER - [SDR 2004FA0000914](https://openairdocs.org/sdr/2004FA0000914.md): Rocker · broken · Oct 22, 2004 · N4068L · Cessna 421 · Reciprocating Engine Cylinder Section > ANNUAL PRE-INSPECTION RUN-UP RAN GOOD. POST INSPECTION RUN-UP RAN ROUGH. SUSPECTED A STICKING VALVE. FURTHER INVESTIGATION REVEALED A BROKEN EXHAUST ROCKER ARM AND STUCK VALVE FOR NR 3 CYLINDER ON THE LEFT ENGINE. ALSO, NOTED IS AN APPARENT INCLUSION IN TH - [SDR 2004FA0000915](https://openairdocs.org/sdr/2004FA0000915.md): Exhaust Rocker · broken · Oct 22, 2004 · N4068L · Cessna 421 · Reciprocating Engine Cylinder Section > ANNUAL PRE-INSPECTION RUN-UP RAN GOOD. POST INSPECTION RUN-UP RAN ROUGH. SUSPECTED A STICKING VALVE. FURTHER INVESTIGATION REVEALED A BROKEN EXHAUST ROCKER ARM AND STUCK VALVE FOR NR 3 CYLINDER ON THE LEFT ENGINE. ALSO, NOTED IS AN APPARENT INCLUSION IN TH - [SDR CA040105004](https://openairdocs.org/sdr/CA040105004.md): Strut · cracked · Dec 16, 2003 · Cessna 421A · Main Landing Gear Strut/Axle/Truck > (CAN) LT MAIN LANDING GEAR COLLAPSED UPON TOUCH-DOWN WITH ALL 3 GREEN LIGHTS ON. FOUND DOWN LOCK ARM BROKEN AWAY FROM LUG ON TOP END OF STRUT. LOCK ARM NORMALLY HOLDS SIDE BRACE IN PLACE AND ACTUATES DOWN SWITCH. REPLACED COMPLETE MAIN LANDING GEAR ASSEMBLY - [SDR CA030116003](https://openairdocs.org/sdr/CA030116003.md): Shaft · broken · Jan 13, 2003 · Cessna 421A · Engine Starter > (CAN) ON DEPARTURE, ENGINE START RT ENGINE NO ROTATION. PILOT CALL MAINTENANCE. MAINTENANCE FOUND THAT STARTER CLUTCH WAS LOOSE. DISMANTLE, FOUND BAD GEAR ON SHAFT THAT IS RUNNING ON CRANKSHAFT GEAR. ENGINE REMOVED AND SEND TO REPAIR SHOP. - [SDR CA030210003](https://openairdocs.org/sdr/CA030210003.md): Windshield · failed · Jan 13, 2003 · Cessna 421A · Flight Compartment Windows > (CAN) WHILE CLIMBING TO FL190, AT APPROXIMATELY FL180 THE COPILOTS WINDSCREEN DEPARTED THE AIRCRAFT RESULTING IN INSTANTANEOUS DECOMPRESSION. OTHER COCKPIT ITEMS ALSO DEPARTED IE, GLARE SHIELD, SUN VISOR DOCUMENTS ETC. AIRCRAFT EMERGENCY DESCENDED TO FL110, RE - [SDR 2000ZZZX625](https://openairdocs.org/sdr/2000ZZZX625.md): Manifold · cracked · Mar 14, 2000 · N3121K · Cessna 421 · Reciprocating Engine Power Section > DURING ANNUAL INSPECTION, A CRACK EXTENDING ABOUT 2 INCHES EACH SIDE OF THE THREADED BOSS. THE BOSS HAD BEEN DRILLED AND TAPPED FOR A HELICOIL. THREADED BOSS IS FOR ATTACHING THE INTERCOOLER. - [SDR 98ZZZX4571](https://openairdocs.org/sdr/98ZZZX4571.md): Shaft Gear · broken · Nov 15, 1998 · N200CH · Cessna 421A · Starter-Generator > GEARS ON SHAFT GEAR BROKEN OFF WHICH CAUSED SHAFT GEAR TO DAMAGE CASE WHERE PILOT BEARING GOES. - [SDR 98ZZZX446](https://openairdocs.org/sdr/98ZZZX446.md): Gasket · failed · Jan 16, 1998 · N98437 · Cessna 421C · Reciprocating Engine Rear Section > ON TAKEOFF, PILOT NOTICED OIL ON RT COWLING. ACFT RETURNED AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND AN900-28 GASKET AT OIL SCREEN COVER ADAPTER LEAKING. GASKET WAS REPLACED AND ENGINE TEST RAN OK. - [SDR 96ZZZX4953](https://openairdocs.org/sdr/96ZZZX4953.md): Adapter · failed · Jun 10, 1996 · N65AE · Cessna 421B · Reciprocating Engine Rear Section > DURING SCHEDULED OIL CHANGE, A LARGE QUANTITY OF FERROUS PARTICLES WERE FOUND IN OIL FILTER AND ON DRAIN PLUG. INVESTIGATION REVEALED BEARING FAILURE OF STARTER DRIVE ADAPTER. FORWARD PILOT BEARING WAS COMPLETELY GONE AND CASE BORE DAMAGED. AFT BEARING SUPP - [SDR 96ZZZX798](https://openairdocs.org/sdr/96ZZZX798.md): Quill Shaft · failed · Jan 26, 1996 · N200CH · Cessna 421A · Reciprocating Engine Rear Section > LEFT ENGINE QUIT ON CLIMB-OUT. PROP FEATHERED AIRCRAFT, MADE SAFE LANDING. FOUND HOLE IN CASE UNDER INTERCOOLER FROM FAILED CONNECTING ROD. PROP TURNS FREELY. ENGINE NOT TORN DOWN AT THIS DATE. SUBMITTER SUSPECTS QUILL SHAFT FAILED ALLOWING ENGINE TO OVER - [SDR 96ZZZX178](https://openairdocs.org/sdr/96ZZZX178.md): Shaft Tooth · broken · Nov 30, 1995 · N2219Q · Cessna 421A · Reciprocating Engine Rear Section > PILOT REPORTED LOWER OIL PRESSURE, RT ENGINE. TROUBLESHOT TO BROKEN TOOTH ON STARTER ADAPTER SHAFT AND FAILED BEARING IN CRANKCASE. BEARING SUPPORT WAS OVERSIZED, FILLING ENGINE OIL SYSTEM WITH METAL. NO PREVIOUS INDICATION OF C/W TCM CSB NR 94-4 COULD BE F - [SDR 96ZZZX179](https://openairdocs.org/sdr/96ZZZX179.md): Bearing · failed · Nov 30, 1995 · N2219Q · Cessna 421A · Reciprocating Engine Rear Section > PILOT REPORTED LOWER OIL PRESSURE, RT ENGINE. TROUBLESHOT TO BROKEN TOOTH ON STARTER ADAPTER SHAFT AND FAILED BEARING IN CRANKCASE. BEARING SUPPORT WAS OVERSIZED, FILLING ENGINE OIL SYSTEM WITH METAL. NO PREVIOUS INDICATION OF C/W TCM CSB NR 94-4 COULD BE F - [SDR 95ZZZX5928](https://openairdocs.org/sdr/95ZZZX5928.md): Shaft · sheared · Jun 16, 1995 · N422RD · Cessna 421A · Reciprocating Engine Front Section > AIRCRAFT ARRIVED AT FBO WITH RIGHT ALTERNATOR PROBLEM. REPAIRED RIGHT ALTERNATOR. WHEN AIRCRAFT START ATTEMPTED, LEFT STARTER FOUND TO HAVE SHEARED THROUGH-BOLT. NEW STARTER INSTALLED. AIRCRAFT DEPARTED FBO AND RETURNED ABOUT 30 MINUTES LATER WITH LEFT ENG ## 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 = 'GTSIO520D' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/engine/continental-gtsio-520-d/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.