Allison 250-C20
Service difficulty reports · 945
Newest first. General aviation reporting is voluntary.
Query with SQL
duckdb -csv -c "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 = '250C20' ORDER BY difficulty_date DESC"
Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
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 = '250C20' ORDER BY difficulty_date DESC
Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
SDR 97ZZZX3425Spool Bearing · wrong partPER AD 82-24-05, INSPECTION REQUIRED TO DETERMINE IF SPOOL BEARING IS CORRECT TYPE. PREVIOUS REPAIR STATION INSPECTED IT AND STATED ON REPAIR TAG THAT SPOOL BEARING WAS CORRECT, WHEN, IN FACT, IT WAS NOT.SDR CA970715012Bushing · debonded(CAN) RIGHT HAND HORIZONTAL STABILIZER FOUND WITH EXCESSIVE MOVEMENT. OVER 2 INCHES IN BOTH VERTICAL AND HORIZONTAL DIRECTIONS. BUSHING HAD DEBONDED AND SCORED 2 GROOVES IN BOTTOM OF SPAR P/N 206-020-120-011. ALSO, INBOARD FITTING WAS ELLIPTICAL RATHER THASDR AU970743Compressor · fod(AUS) COMPRESSOR DAMAGED BY FODSDR CA970626013Fuel Send Unit · inaccurate(CAN) FUEL QUANTITY DROPPED TO 10 GALLONS AND HELD THEN INDICATED ZERO GALLONS.SDR CA970630003Bearing · cracked(CAN) WHEN REPLACING GRIPS FOR TX FOUND BEARING WITH A CRACKED SEPARATOR.SDR CA970626010Blower Motor · sheared(CAN) SCREWS SHEARED OFF IN MOUNTING BRACKET.SDR CA970609012Governor · malfunctioned(CAN) GOVERNOR DROOPS TO 94 PERCENT NR AND THEN OVERSPEEDS TO 105 PERCENT. ROOP COMPENSATOR IS SET TO MAXIMUM.SDR CA970528012Seal · leaking(CAN) SEAL HAS LEAKED EXCESSIVELY SINCE INSTALLATION IN TAIL ROTOR GEARBOX.SDR CA970626008Indicator · out of limits(CAN) FUEL QUANTITY INDICATOR INSTALLED AND FOUND OUT OF LIMITS FOR CALIBRATION.SDR AU970626Compressor · fod(AUS) COMPRESSOR DAMAGED BY FOD - INSPECTION SUGGESTS THAT THE FOD WAS A SOFT OBJECT SUCH AS A WASPS NEST RATHER THAN A HARD METALIC TYPE OBJECTSDR CA970626012Tot Indicator · frayed(CAN) TOT INDICATOR RECEIVED FROM O/H WITH ELECTRICAL PLUG FOR THE INSTRUMENT LIGHTING TORN OFF WITH THE FRAYED ENDS OF WIRING REMAINING.SDR CA970526005Frame · cracked(CAN) FOUND RIVET LOOSE AT STA 142.33. CHECK INSIDE AIRFRAME REVEALED FRAME CRACKED. AIRCRAFT TT: 9,419 HOURS.SDR CA970526006Bulkhead · cracked(CAN) CRACK FOUND AT TAIL ROTOR GEARBOX ATTACHMENT POINT. LEFT REAR BOLT HOLE. AIRCRAFT TT: 9,419 HOURS.SDR CA970609008Switch · broken(CAN) INTERCOM TRANSMIT CONTACTOR IN SWITCH BROKE. THIS CAUSED THE RADIO TRANSMIT SIDE TO BE JAMMED THEREBY PREVENTING THE PILOT FROM TRANSMITTING.SDR CA970506018Oil Tank · cracked(CAN) ENGINE OIL TANK LOOSE, FOUND OIL TANK SUPPORT FLANGE HAD COMPLETELY BROKEN AROUND ONE ATTACHING BOLT HOLESDR CA970528015Mag Seal · leaking(CAN) MAGNETIC SEAL SQUEELING ON SHUT DOWN SINCE INSTALLATION. OIL DARK AND BLACK, NON-MAGNETIC FILM IN FILTER.SDR CA970609005Cover · loose(CAN) ISOLATION MOUNT COVER AND SCREWS LOOSE, CAUSING INTERMITTANT VIBRATION IN-FLIGHT.SDR CA970528017Trunnion · offset(CAN) MAIN ROTOR BALANCED AND ALIGNED STATICALLY PRIOR TO INSTALLATION. SEVERE VIBRATIONS ON GROUND RUN. TRUNNION WAS FOUND TO BE OFFSET BY 0.009 INCH. ADJUSTMENT SCREWS COULD NOT BE ADJUSTED.SDR CA970422039Shaft · cracked(CAN) CRACK ORIGINATING INSIDE SHAFT FLANGE, SPREADING OUTWARD UNTIL PAST FLANGE. THE CRACK TURNED 90 DEGREES AND SPREAD AROUND SHAFT.SDR CA970422021Support Assy · cracked(CAN) DROOP COMPENSATOR SUPPORT ASSEMBLY FOUND CRACKED. CRACK WAS APPROX 1 INCH BELOW PIVOT POINT FOR THE BELLCRANK ON THE INBOARD PORTION OF THE SUPPORT.SDR CA970609003Seal · leaking(CAN) INPUT SEAL AREA WOULD NOT STOP LEAKING . FOUR SEALS AND SPACERS CHANGED WITH NO SUCCESS.SDR CA970609004Freewheel Unit · leaking(CAN) CENTER PLUG LEAKING OIL INTO CAVITY BETWEEN FREE WHEELING UNIT AND INPUT DRIVESHAFT FLANGES. OIL THEN TRANSFERRING INTO DRIVESHAFT COUPLING VIA VENT HOLE IN COUPLING CAP. GREASE IN COUPLING IS DILUTED BY OIL CAUSING GREASE LEAKAGE.SDR CA970422002Leg · cracked(CAN) CRACK FOUND AT AIRFRAME SIDE OF ENG MOUNT ATTACHMENT.SDR CA970421059Tube · leaking(CAN) TUBE ASSEMBLY LEAKING. TUBE ENCASED IN HEAT SHRINK MAKING IT DIFFICIULT TO ASCERTAIN ACTUAL AREA OF LEAKAGE.SDR CA970528018Governor · overspeed(CAN) ENGINE OVERSPEEDS AND GOVERNOR WILL NOT RECOVER.SDR CA970327018Freewheel Unit · leaking(CAN) FRONT SEAL OF FREEWHEEL UNIT LEAKING.SDR CA970421043Tach Generator · sheared(CAN) N1 TACH GENERATOR SHAFT SHEARED.SDR CA970421044Gearbox · leaking(CAN) INPUT SEAL LEAKING. 5 ATTEMPTS AT SEAL REPLACEMENT COULD NOT STOP GEARBOX LEAKING, GEARBOX REPLACED.SDR HEEA979158Housing · below specsRECEIVING INSPECTION REVEALED: MEASURED .005 LEFT/.006 RIGHT BELOW SPECS ON GEARBOX HOUSING. COMPRESSOR MOUNT PAD STUDS AS MARKED.SDR CA970327024Link · worn(CAN) DOOR LATCH OPENING LINK WAS CHAFING ON NUTPLATE SECURING PLATE COVER P/N 206-031-501-104. LINK WAS SUBSTANTIALLY DAMAGED TO THE POINT OF BEING WORN ALL THE WAY THROUGH.SDR CA970311002Seal · leaking(CAN) NR 1 SEAL LEAKING. PART TC: 11,543.SDR CA970311022Seal · leaking(CAN) NR 1 SEAL LEAKING. PART TC: 11,543.SDR CA970311037Switch · broken(CAN) ELECTRICAL TERMINAL BROKE OFF FUEL PRESSURE SWITCH UPON INSTALLATION. TERMINAL APPEARS TO HAVE BEEN SOLDERED ON.SDR 97ZZZX1024Tube · crackedDURING OVERHAUL OF THE TURBINE, FOUND THE BEARING OIL TUBE TO HAVE A CRACK IN THE FLARE.SDR CA970311090Case · worn(CAN) ENGINE POWER CHECK DOWN. COMPRESSOR CASE WAS FOUND WORN AND PIECES FOUND MISSING FROM LINING AT 4TH AND 5TH STAGES.SDR CA970212005Line · split(CAN) SPLIT PITOT LINE CONNECTING PITOT TUBE TO THE PITOT DRAIN AND PITOT SYSTEM. SUSPECT WATER FROZE IN LINE AND CAUSED IT TO SPLIT.SDR CA970311089Pylon Support · loose(CAN) BEARING LOOSE, TEFLON COMING OFF BEARING.SDR CA970206015Bolt · cracked(CAN) WHILE BUILDING UP AN ENGINE AND INSTALLING A COMPRESSOR, THE BOLT USED TO RETAIN THE COMPRESSOR TO THE GEARBOX. IT WAS A NEW BOLT, BUT UPON CLOSE EXAMINATION USING A GLASS, A CRACK WAS FOUND WHERE THE LANDS CONVERGE.SDR CA970311084Circuit Breaker · worn(CAN) FORWARD BOOST PUMP INTERMITTANT. NOT SWITCHING ON. CIRCUIT BREAKER WORN.SDR CA970311081Sending Unit · failed(CAN) FUEL SENDING UNIT SENDING ERRONEOUS READINGS. DROPPING FROM 15-20 GALS TO ZERO.SDR CA970219003Tube Assembly · corroded(CAN) ALUMINUM MAIN FUEL SYSTEM SUPPLY TUBE HAS A STEEL SLEEVE BETWEEN THE "B" NUT AND THE TUBE (FLARE), THIS SLEEVE WAS FOUND BADLY CORRODED. THE TUBE FLARE AND ADJOINING FITTING WERE ALSO CORRODED ALMOST TO THE POINT OF FAILING.SDR CA970311080Cooler · corrosion(CAN) PRIOR TO INSTALLATION, THE INSPECTION REVEALED CORROSION AT BOTH THE INLET AND OUTLET PORTS, AS WELL AS A SUBSTANTIAL AMOUNT ON THE BYPASS VALVE.SDR 97ZZZX3990Screen · contaminatedON JANUARY 12, 1997, A HUGHES 369D WAS INVOLVED IN AN ACCIDENT DUE TO FUEL STARVATION (SEE ACCIDENT NR LAX97LA088). THE STARVATION APPEARS TO HAVE BEEN CAUSED BY CONTAMINATION COLLECTING ON THE FUEL NOZZLE SCREEN RESTRICTING THE FLOW AND SUBSEQUENTLY COLLAPSISDR CA970311076Filter · wrong part(CAN) FACET OIL FILTER FOUND INSTALLED IN ENGINE OIL SCAVENGE FILTER LOCATION DURING 200 HOUR CHECK.SDR CA970421056Gear · worn(CAN) REAR ADAPTER SPLINES WORN WELL BEYOND LIMITS.SDR CA970311074Seal · leaking(CAN) T/R ASSY INPUT SEAL FOUND LEAKING EXCESSIVELY.SDR CA970211003Linear Actuator · cracked(CAN) ACTUATOR EXTEND LIMIT SWITCH HOUSING WAS FOUND CRACKED. A RIGGING CHECK WAS CARRIED OUT, NO LIMITS EXCEEDED.SDR 97ZZZX786Seal · under spec3 HOURS AFTER SEAL INSTALLATION, PILOT NOTICED OIL LEAK IN STARTER/GEN AREA DURING PREFLIGHT INSP. DURING GROUND RUN, ENG OIL WAS FOUND TO BE LEAKING AT A RATE OF 12 DROPS PER MINUTE. STARTER/GEN WAS REMOVED AND P/N A6854424 WAS FOUND HALF OUT OF SEAL BORE. SDR CA970311072Channel · misrepaired(CAN) UNAPPROVED REPAIR INCORPORATED. NO REPAIRS ALLOWED IN THIS AREA PER STRUCTURES REPAIR MANUAL.SDR CA970311073Support · cracked(CAN) SUPPORT WAS CRACKED IN FORWARD UPPER RIGHT HAND RADIUS. NO CRACKS ALLOWED IN THIS AREA. THIS DAMAGE WAS VISIBLE ONLY WITH FUEL CELL REMOVED. AIRCRAFT TT: 15,819 HOURS.
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