Allison 250-C28B
Service difficulty reports · 286
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 = '250C28B' 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 = '250C28B' 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 ALG2005F00062Fuel Filter · damagedON TAKEOFF FUEL FILTER LIGHT ILLUMINATED. NOTIFIED MAINTENANCE. REMOVED FUEL FILTER AND FOUND FILTER DARKENED APPROXIMATELY 50 PERCENT. NO SEDIMENT IN BOWL. NO CONTAMINATES WERE FOUND IN THE AIRCRAFT FUEL SAMPLE. INSTALLED NEW FUEL FILTER, BLED SYSTEM, C/SDR ALG2005F00080Hand Pump · damagedDURING TAKEOFF, THE PILOT NOTICED THE CYCLIC AND COLLECTIVE ARE STIFF WITH NO FRICTION APPLIED. THE PILOT FOLLOWED EMERGENCY CHECK LIST AND LANDED. THE SUBSEQUENT INSPECTION BY MECHANIC REVEALED THAT THE HYD PUMP SHAFT SPLINES WERE STRIPPED. REMOVED AND REPSDR EVCA105166Engine · making metalENGINE CAUTION WARNING CHIP DETECTOR LIGHT ILLUMINATED IN FLIGHT. CHIP DETECTOR WAS REMOVED AND NO SIGNIFIGANT CHIP WAS FOUND. REINSERTED CHIP PLUG AND RAN AIRCRAFT LIGHT ILLUMINATED AGAIN. MINTENANCE FOUND EXTENSIVE METAL ON BOTH UPPER AND LOWER ENGINE CHIPSDR CA050804001Nozzle · cracked(CAN) EJECTOR NOZZLE BROKE OFF INTO THE INTAKE PLENUM AND EVENTALLY WERE DRAWN INTO THE COMPRESSOR.SDR ALG2005F00054Switch · failedDURING RUN UP THE FLOAT WOULD NOT ARM, THE PILOT SHUT THE AC DOWN AND NOTIFIED MAINTENANCE. THE MECHANIC REMOVED AND REPLACED THE FLOAT ARM SWITCH AND THE AC WAS RETURNED TO SERVICE UPON COMPLETION OF THE FUNCTION CHECKS. (K)SDR ALG2005F00046Throttle Cable · severedUPON LANDING, FOR CARGO TRANSPORT, THROTTLE WAS REDUCED TO FLIGHT IDLE BUT ENG RPM STAYED THE SAME, THROTTLE WAS OPENED AND CLOSED SEVERAL TIMES WITH NO EFFECT ON ENG RPM. FINALLY, PILOT SHUT ENGINE OFF BY TURNING THE MAIN FUEL SHUT OFF AND NOTIFIED MAINTENANSDR ALG2005F00040Tachometer · inoperativeON LIFT OFF PILOT NOTICED TURBINE TACH INDICATOR IS ZERO, LANDED THE AIRCRAFT. THE MECHANIC REMOVED AND REPLACED THE ROTOR TACH INDICATOR AND THE AC WAS RETURNED TO SERVICE. (K)SDR ALGA101180Shroud · defectiveFUEL NOZZLE REMOVED FOR STARTING PROBLEM. HOUSING UNSCREWED FROM SHROUD. SHROUD STAYED IN LINER FERRULE. DIMENSIONALLY CHECKED LINER FOUND TOO SMALL AND TAPERED CAUSING INTERFERENCE FIT. REPLACED WITH SERVICEABLE LINER.SDR ALG2005F00030Gauge · inoperativeON INITIAL TAKEOFF AFTER ESTABLISHING A POSITIVE RATE OF CLIMB, CROSS CHECKED THE INSTRUMENT PANEL AND HAD NO INDICATION OF ENGINE OIL TEMPERATURE OR PRESSURE. NOTIFIED TOWER MADE 180 DEGREE TURN AND RETURNED TO BASE AND LANDED. MAINTENANCE REMOVED AND REPLASDR CA050503003Saddle · cracked2 PIECE SADDLE, CRACKED ACROSS BOLT HOLE, .250 TO EDGE AND .750 TO BEND STEP RADIUS. FORWARD SIDE, 3RD BOLT HOLE DOWN FROM TOP. PART REPLACED WITH 1 PIECE SADDLE.SDR CA050321005Magnetic Seal · leaking(CAN) DURING CRUISE FLIGHT, FLUID WAS SEEN ON THE WINDOW BY THE LT REAR PASSENGER. THE PILOT REPORTED THE AIRCRAFT LOCATION TO OUR RADIO OPERATOR AND LANDED TO SEE WHERE THE FLUID WAS COMING FROM. UPON INSPECTION, IT APPEARED THAT THE OIL WAS COMING FROM THE RSDR CA050309003Spring · mismanufactured(CAN) OIL LEAK FROM T/R GEARBOX OUT PUT. THE SPRING INSIDE THE SEAL WHEN TO THE SEAL LIP AND MARK THE SLEEVE. THIS IS THE SECOND TIME IN 2 WEEKS, THE SPRING IS TO TIGHT AND PUSHES TO MUCH ON THE SEAL LIP .SDR CA050309011Tach Generator · worn(CAN) DURING ROUTINE MAINTENANCE WORN SPLINES WERE FOUND. NOTE: THESE SPLINES DRIVE THE HYDRAULIC PUMP. TACH GENERATOR WAS REMOVED AND SENT FOR OVERHAUL. PART WAS RETURNED 2 MONTHS LATER WITH NEW PAINT AND THE SAME WORN OUT SPLINES. OLD GREASE WAS STILL IN THSDR CA050309002Seal · leaking(CAN) T/R GEARBOX OUTPUT SEAL LEAKING, SENT FOR SEAL REPLACEMENT. THE SPRING INSIDE THE SEAL WAS AT THE SEAL LIP AND MARKED THE SLEEVE .SDR CA050223001Filter · open(CAN) ENGINE FLAME OUT ON LANDING, 200 POUNDS ON BOARD. SENT AME ON SITE CHECK FUEL SYSTEM. IN-LINE FUEL FILTER STUCK OPEN. CLEAN ALL FUEL SYSTEMS AND GROUND RUN IAW MM PROCEDURE. FLEW THE A/C BACK TO THE HANGAR AND CLEANED FUEL SYSTEMS AGAIN. CHECK FOR LOSDR CA050218004Spline · stripped(CAN) PILOT LOST NR INDICATION, THEN HYDRAULICS TO FLIGHT CONTROLS. PILOTS LANDED IMMEDIATELY. TACH GENERATOR AND HYDRAULIC PUMP REPLACED. TACH GENERATOR DRIVE REMOVED AND SPLINE INSIDE TACH GENERATOR FOUND TO BE STRIPPED.SDR ALG2005F00001Wire · burnedDURING RUN UP, SMOKE OBSERVED COMING FROM UP CIRCUIT BREAKER PANEL, AIRCRAFT SHUT DOWN AND MAINTENANCE WAS NOTIFIED. MAINTENANCE INSPECTED AND FOUND THE DIODE ON THE BATTERY RELAY, SEVERAL WIRES ON BATTERY RELAY BURNED. FURTHER INSPECTION FOUND WIRES GOING USDR ALG2004F00072B-Nut · looseAIRCRAFT HAD COMPRESSOR STALL ON TAKE OFF. MAINTENANCE INSPECTED ENGINE INTAKE AND EXHAUST FOR EVIDENCE OF FOD, NO DAMAGE NOTED. PERFORMED AN ENGINE AIR LEAK CHECK AND FOUND THE PC LINE FROM THE GOVERNOR TO THE FUEL CONTROL WITH A LOOSE B-NUT. TORQUE CHECKESDR ALG2005F00003B-Nut · looseDURING TAKEOFF, AIRCRAFT HAD A COMPRESSOR STALL. MAINTENANCE INSPECTED ENGINE INTAKE AND EXHAUST FOR EVIDENCE OF FOD NO DAMAGE NOTED. PERFORMED AN ENGINE AIR LINE LEAK CHECK AND FOUND THE P/C LINE FROM THE GOVERNOR TO THE FUEL CONTROL WITH A LOOSE B-NUT. TOSDR ALG2004F00068Compressor · stalledON FINAL APPROACH, MC486 POWER WAS REDUCED, THE COMPRESSOR BEGAN TO STALL, AC LANDING WAS UNEVENTFUL. MECHANIC INSPECTED ENGINE INLET AND COMPRESSOR AREA, COMPLIED WITH AIR LINE LEAK CHECK, TIGHTENED 2 GOVERNOR LINE FITTINGS, RINSED THE ENGINE AND FOUND EVIDESDR Y3AR097979Turbine Nozzle · destroyedDURING DISASSEMBLY FOUND NR 2 TURBINE NOZZLE DIAPHRAM TO BE DETACHED FROM THE NOZZLE ASSEMBLY. THIS CAUSED THE DIAPHRAM TO RUB ON BOTH THE 1ST & 2ND STAGE TURBINE WHEELS CAUSING SEVER DAMAGE TO BOTH WHEELSSDR CA041006004Longeron · cracked(CAN) IN THE TASK OF CHANGING THE LONGERON, IT WAS VISUALLY NOTED THAT THIS FRAME WAS CRACKED IN TWO PLACES. THE CRACKS WERE NEAR THE UPPER TWO ATTACHMENT POINTS OUT OF THE 4 ATTACHMENT POINTS.SDR CA040928009Longeron · cracked(CAN) THE MAINTENANCE CREW WERE DOING A 600 HOUR INSPECTION ON THE AIRFRAME AS PART OF THE INSPECTION. THE FUSELAGE TO TAILBOOM SUPPORT REQUIRES A VISUAL INSPECTION. FOUND A SLIGHT BLACK MARK NEAR THE UPPER FUSELAGE SUPPORT FOR THE TAILBOOM. THE AREA WAS CLESDR ALG2004F00049Pump · failedWHILE AT A HOVER, MANEUVERING FOR TAKE OFF, NOTICED N2 DROPPED AND STABILIZED BELOW THE RED LINE AND DID NOT RECOVER UNTIL LANDED. REMOVED AND REPLACED STARTER GENERATOR, DID NOT FIX THE PROBLEM. REMOVED ALL ENGINE AIR LINES AND INSPECTED FOR CRACKS AND LEAKSDR ALGA096920Nozzle · out of toleranceNOZZLE HEIGHT WAS MEASURED AT .620SDR ALG2004F00040Warning Light · illuminatedUPON HOVERING OUT EVERYTHING IN THE GREEN, TURNING DOWNWARD TO THE TAXI WAY LOOKING TO AVOID OBSTACLES GLANCING BACK AT INSTRUMENTS TOT RED LIGHT WAS ON, INDICATION WAS JUST ABOVE 810 DEGREES, BLEED AIR WAS ON. MAINTENANCE COMPLIED WITH A HOT END INSPECTION OSDR ALG2004F00035Blade · delaminatedIN CRUISE FLIGHT, AIRCRAFT COMMENCED AN APPROX 1/1 VERTICAL BEAT WITH AN UNUSUAL NOISE AND (HUM) IN THE AIRFRAME. PILOT DIVERTED TO FIELD LANDING SITE. AFTER SHUT-DOWN, PILOT FOUND BLADE SKIN DELAMINATING NEAR TIP. MAINTENANCE REMOVED AFFECTED BLADE AND INSSDR CA040624005Fitting · cracked(CAN) FORWARD UPPER LT TAILBOOM ATTACHMENT FITTING FOUND CRACKED DURING 200 HOUR INSPECTION. MFG INSPECTION CALLS FOR SPECIAL ATTENTION TO THIS AREA DURING THE INSPECTION. THIS IS A KNOWN PROBLEM AREA.SDR ALG2004F00002Engine · failedENGINE START WAS NORMAL BROUGHT THE AIRCRAFT TO A 3 FT HOVER ALL ENGINE INDICATIONS NORMAL, AT THIS TIME THE PILOT HEARD A SLIGHT BANG FROM THE REAR OF THE AIRCRAFT FOLLOWED BY A LOUD GRINDING WHINE AND A HIGH FREQUENCY VIBRATION IN AIRFRAME. AC BEGAN A SLIGHSDR CA040217010Blade · scored(CAN) MAIN ROTOR BLADE BOLT EXTREMELY DIFFICULT TO REMOVE FROM BOTH BLADES/MAIN ROTOR HUB. BOLTS, BLADE BUSHINGS AND MAIN ROTOR GRIPS ALL HAD HEAVY SCORING. CAUSE UNKNOWN. BOLTS SCRAPPED. BUSHINGS REPLACED IN MAIN ROTOR BLADE AT APPROVED FACILITY, AND MAIN ROSDR CA031005001Battery · failed(CAN) RECURRING DEFECT ON BATTERY (2BT1 - DESIGNATORS IAW ELECTRICAL DRAWING) ON LINE FAULT. BATTERY REMOVED AND INSPECTED. VOLTAGE AND CURRENT DRAW SATISFACTORY ON BENCH. VISUAL INSPECTION REVEALED LOOSE RETAINING NUT ON ONE TERMINAL CAUSING INTERNAL ARCINSDR CA030923005Bearing · failed(CAN) NR 1 ENGINE BEARING FAILED, CHIP LIGHT NOTIFIED PILOT. AIRCRAFT WAS IN CRUISE FLIGHT. UPON INVESTIGATION THE BEARING CAGE AND BALLS WERE NO LONGER CONTAINED BETWEEN THE INNER AND OUTER RACES. THE IMPELLER WAS ALLOWED TO TILT AND AS A RESULT RUBBED A GROOSDR ALG2003F00094Chip Detector · malfunctionedDURING TAKE-OFF, THE TRANSMISSION CHIP LIGHT ILLUMINATED. RETURNED TO BRA7. PILOT PULLED, INSPECTED AND CLEANED CHIP PLUG. LEAK CHECKED AND GROUND RAN IAW OPS MANUAL. NO DEFECTS NOTED.SDR ALG2003F00086Starter Gen · failedCOMING TO A HOVER FOR TAKE OFF. N2 DROOPED TO 94 PERCENT AT 50 PERCENT TORQUE AND STAYED THERE FOR 15 SECONDS. ABLE TO RECOVER BY BEEPING. BEFORE HOVER, N2 WAS STABILIZED AT 100 PERCENT. MAINTENANCE REPLACED STARTER GENERATOR.SDR ALG2003F00082Governor · malfunctionedUPON COMING TO A HOVER. NR 2 DROPPED TO 92 PERCENT AND TOOK UP TO 15 SECONDS TO RECOVER AT HIGH TORQUE SETTING (ABOVE 80 PERCENT) N2, WOULD NOT DROOP AT LOW TORQUE SETTING. MAINTENANCE CHANGED GOVERNOR, LINER ACTUATOR, AND CHECKED NR2 RIGGING, CHECKED GOOD.SDR CA030930006Scroll · cracked(CAN) DURING INSPECTION A CRACK WAS FOUND IN THE COMPRESSOR SCROLL.SDR ALG2003F00089Control Rod · corrodedDURING PHASE INSPECTION, TAIL ROTOR LONG CONTROL WAS FOUND TO BE CORRODED AT OR NEAR NYLATRON STRIP CAUSING THE STRIPS TO BE LOOSE.SDR CA030903009Attach Fitting · cracked(CAN) ON SCHEDULED 100 HR INSPECTION, VISUAL INSPECTION OF TAILBOOM ATTACH FITTINGS. UPPER LT AIRFRAME FITTING FOUND CRACKED. UPON FURTHER INVESTIGATION AFT AIRFRAME BULKHEAD FOUND CRACKED AT UPPER LT LOCATON. SUSPECTED CAUSE LONG IDLE TIMES AT 60 PERCENT SDR CA030826010Resistor · burned(CAN) DURING NORMAL LEVEL CRUISE SMOKE & FUMES SEEN ESCAPING OVERHEAD ELECTRICAL PANEL. AIRCRAFT LANDED AND SHUTDOWN. SMOKE DISAPPEARED AND ALL SYSTEMS FOUND FUNCTIONAL EXCEPT INSTRUMENT LIGHTS. INSTRUMENT LIGHTS BREAKER PULLED AND DEACTIVATED. UPON INSPECSDR ALG2003F00076Governor · fluctuatesAFTER TAKE OFF, ENGINE BEGAN SURGING, AIRCRAFT WAS YAWING LT AND RT, TORQUE WAS FLUCTUATING +/- 30 PERCENT. THROTTLE CONFIRMED OPEN, ENGINE BEEPED TO MAXIMUM N2 AND NR WOULD NOT GO ABOVE 94 PERCENT, UPON LANDING THE MECHANIC REMOVED AND REPLACED THE GOVERNORSDR ALG2003F00077Starter Gen · failedAFTER TAKE OFF ENGINE BEGAN SURGING, AIRCRAFT WAS YAWING LEFT AND RIGHT, TORQUE WAS FLUCTUATING +/- 30 PERCENT. THROTTLE CONFIRMED OPEN, ENGINE BEEPED TO MAXIMUM N2 AND NR WOULD NOT GO ABOVE 94 PERCENT UPON LANDING THE MECHANIC REMOVED AND REPLACED THE GOVERNSDR HEEA088562Starter Gen · failedFIRST START AFTER INSTALLATION GENERATOR WOULD NOT COME ON LINE. SHOP REPAIR.SDR ALGA087723Gearshaft · spalledFOUND SPALLING ON GEAR TEETH. REMOVED AND REPLACED DUE TO SPALLING ON GEAR TEETH FROM POSSIBLE IMPROPER MESHING OF GEAR TEETH.SDR ALGA087724Gear · defectiveAS PER MANDATORY BULLETIN T-075. REMOVED AND REPLACED. SUBMITTED BY: PRESTON BARZARESDR CA030528006Case · cracked(CAN) 1 SPLINE, ADJACENT TO 3 REWORKED SPLINES HAS SUSPECTED CRACK, IMPACT DAMAGE AND CORROSION PITTING OVER 40 PERCENT LENGTH OF SPLINE. 2ND ADJACENT SPLINE, ALSO HAS SUSPECTED CRACK AND CORROSION PITTING. CRACKS NOT IDENTIFIED ON INITIAL OH NDI ( FPI). SDR 2003FA0000388Mount · mismanufacturedWHEN CHECKING FOR FIT, ANGLE OF FITTING NOT CORRECT, WILL NOT FIT RIGHT SIDE. BETTER QUALITY CONTROL PRIOR TO SHIPMENT.SDR CA030212002Connector · corroded(CAN) DURING CRUISE GEN LIGHT CAME ON AND WOULD NOT RESET. ON INSPECTION AFTER MUCH TROUBLE SHOOTING, PIN 'B' ON THE MAIN STARTER/GENERATOR CONNECTOR PLUG IN THE ENGINE COMPARTMENT WAS THE PROBLEM. THE LOCKING MECHANISM FOR PIN 'B' WAS NOT HOLDING THE FEMALE ESDR CA030211013Spring · broken(CAN) UPON DISSASSEMBLY OF DRIVESHAFT FOR ROUTINE SERVICING AND INSPECTION IN ACCORDANCE WITH BELL 206L-1 MM , SUBJECT SPRING WAS FOUND BROKEN AND DISLODGED WITHIN THE COUPLING HOUSING CAUSING DAMAGE TO BOTH THE SPHERICAL COUPLING SURFACE AND OUTER COUPLING.NOSDR ALG2003F00000Fuel Control · surgesAFTER LANDING, WHILE AT FLIGHT IDLE THE ENGINE BEGAN TO SURGE, T.O.T. WOULD GO FROM 450C-500C AND N1 WOULD VARY FROM 60-61.5 PERCENT. THE MECHANIC CHECKED THE FUEL SAMPLE, INSPECTED THE EXTERNAL FUEL FILTER, FUEL NOZZLE SCREEN FOR CONTAMINATION, NONE FOUND, RSDR ALG2003F00021Fuel Control · failedDURING START, NR 1 ENGINE DID NOT EXCEED 30 PERCENT, PILOT ABORTED THE START AND USED BATTERY CART TO START THE AIRCRAFT. NO POWER FROM BATTERY CART, APU CIRCUIT BREAKER POPPED, UPON RESET THE PILOT OBSERVED A SPARK FROM THE OVERHEAD CIRCUIT BREAKER PANEL. T
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