JASC 6120
Service difficulty reports · 1,421
Reports filed under 6120 · Propeller Controlling System, newest first.
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 jasc_code = '6120' 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 jasc_code = '6120' 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 COMA9610230Ballscrew Servo · defectiveAD-94-22-12. WHILE PERFORMING HAMILTON STANDARD SB 14RF-9-61-A53 REV. S, FOUND THE SPLINES OF THE BALLSCREW SERVO WERE WORN BEYOND LIMITS PRIMARILY ON THE RIGHT SIDE OF THE SPLINES. ACTION TAKEN: SENT PCU OUT TO HAMILTON STANDARD FOR FURTHER EVALUATION.SDR COMA9610178Spline · defectiveWHILE PERFORMING AD-94-22-12 HAMILTON STANDARD S/B 14RF9-61-A53 REV S. FOUND THE SPLINES OF THE BALLSCREW SERVO WORN BEYOND LIMITS PRIMARILY ON THE RIGHT SIDE OF THE SPLINES. SENT PCU OUT TO HAMILTON STANDARD FOR FURTHER EVALUATION.SDR SRAA69602Valve Hsg · bad bearingON CLIMB-OUT FROM AVB TO AAB - NR 1 ENGINE RPM FLUCTUATED FROM 105 PERCENT TO 95 PERCENT IN LESS THAN ONE SECOND, NO LOW OIL LIGHT AND MECHANICAL GOVERNING HAD NO EFFECT ON CONDITION, SHUT DOWN NR 1 ENGINE AS PRECAUTIONARY, AIRCRAFT LANDED SAFELY AT AAB. FOUNSDR GLBA96115Solenoid · wiring damagedORD - CREW REPORTED THE AIRCRAFT PULLS TO THE RIGHT DURING FLARE. MAINTENANCE REPAIRED DAMAGED WIRING AT THE RIGHT LOW PITCH SOLENOID. OPS CHECK WAS GOOD. (X)SDR C2XA96IA141Prop Actuator · seizedIAH - FLT 3830 - DURING TAKEOFF ROLL, THE NR 2 ENGINE PRODUCED ONLY 22 PERCENT TORQUE. AIRCRAFT RETURNED, MX FOUND THE RIGHT PROPELLER ACTUATOR PITCH CHANGE MECHANISM SEIZED. THE RIGHT PROPELLER ACTUATOR WAS REMOVED AND REPLACED GROUND OPERATIONAL, LEAK CHECKSDR WWMA9600049Prop Pitch Contl · defectiveAFTER TAKEOFF THROUGH 6,000 FEET, THE POWER ROLLED BACK TO 96 PERCENT RPM, IT THEN DECREASED TO 95 PERCENT, EGT WAS AT 640 DEGREES AND AT TIMES 650 DEGREES. SPEED LEVER WAS AT HIGH AND THE CREW WAS ABLE TO CONTROL EGT BY PULLING BACK. POWER HAD NO EFFECT ON SDR AU960751Pin · faulty(AUS) NO2 ENGINE PROPELLER FEATHER CONTROLLER PLUG FAULTY DUE TO UNDERSIZE PIN AT G9811-P16SDR RAIA960534Restrictor · dirtyCOU - FLT 7030 - NR 2 BETA LIGHT ILLUMINATED ON TAKEOFF. REMOVED CLEANED AND REINSTALLED BETA SWITCH RESTRICTOR. (M)SDR GLBA96096Beta Cable · out of adjustMSP - CREW REPORTED THE RT PROPELLER DROPPED TO LOW IDLE IN FLAIR. AFTER UNEVENTFUL LANDING, MAINTENANCE RIGGED RT PROPELLER BETA CABLES. OPS CHECK WAS GOOD. (X)SDR COMA9610144Sig Cond Unit · malfunctionAUTO FEATHER SYSTEM WILL NOT TEST OR ARM. REPLACED THE RT ENGINE SIGNAL CONDITIONER UNIT.SDR COMA9610145Prop Contl Unit · malfunctionLEFT PROPELLER TAKES 30 SECONDS TO TRANSITION FROM FEATHER TO BETA RANGE. REPLACED THE PROPELLER CONTROL UNIT.SDR AU961201Motor · loose(AUS) RH ENGINE HYDROMECHANICAL UNIT (HMU) TORQUE MOTOR RETAINING BOLTS(3OFF) LOOSE AND RETURN FLOW `O' RING DAMAGED - SUSPECT INCORRECTLY TORQUED DURING LAST SHOP VISITSDR AU960602Link · broken(AUS) PROPELLER NO1 BLADE PITCH CHANGE LINK BROKEN - FURTHER INSPECTION FOUND INCORRECT BLADE RETENTION NUT 'O' RINGS FITTED - PROPELLER IS GREASE FILLED WITH OIL FILLED PROPELLER 'O' RINGS FITTED TO UNMODIFIED GROOVES - PERSONNEL/MAINTENANCE ERROR - UNAPPROVESDR CA960508005Valve Housing · malfunction(CAN)ON APPROACH, TORQUE ON #4 ENGINE COULD NOT BE REDUCED BELOW 5000 LBS. ON LANDING, PROP FAILED TO GO INTO BETA RANGE, ENGINE SHUTDOWN. #4 VALVE HOUSING REPLACED.SDR AU960717Pipe · corroded(AUS) PROPELLER CONSTANT SPEED UNIT (CSU) RIGID PIPE, STEEL 'B' NUTS AND SLEEVE BADLY CORRODED/RUSTEDSDR AU960558Spring · faulty(AUS) PROPELLER GOVERNOR SPEEDER SPRING FAILEDSDR ABXA9600485Linkage · not connectedRIGHT ENGINE HIGH STOP LIGHT ILLUMINATED IN FLIGHT AT APPROXIMATELY 5,000 FEET, 230 KNOTS AND 20 DEGREES CELSIUS. FOUND HIGH STOP LINKAGE UNDONE. RE-CONNECTED LINKAGE. GROUND OPS CHECKED GOOD.SDR 96ZZZX2982Control Shaft · nut backed offDURING FLIGHT, CONTROL SHAFT NUT BACKED OUT CAUSING LOSS OF ENGINE OIL AND SUBSEQUENT ENGINE DESTRUCTION. IT HAS BEEN DETERMINED THE CONTROL SHAFT GASKET WAS NOT PROPERLY BENT TO PROVIDE A MEANS TO SAFETY THE CONTROL SHAFT NUT TO PREVENT IT FROM LOOSENING/BACSDR CA960429007Prop Control · broken strands(CAN)THE PROPELLER CONTROL WOULD NOT GO ALL THE WAY TO FINE PITCH, DOWN 300 RPM AT FULL THROTTLE AND CONTROL FELT STIFF. REMOVAL AND DISASSEMBLY REVEALED A BROKEN STRAND WHICH, WHEN THE CONTROL WAS OPERATE D, EXPANDED IN THE CASING AND JAMMED.SDR SRAA49604Valve Housing · defectiveFLT 1201 - DURING CRUISE, NR 4 PROPELLER RPM DECREASING BELOW 98 PERCENT, PRECAUTIONARY SHUT DOWN NR 4 ENGINE AND ACCOMPLISHED AIR TURN-BACK TO LIM. LANDED SAFELY. FOUND NR 4 PROPELLER VALVE HOUSING DEFECTIVE. REPLACED VALVE HOUSING PER MM, CHAPTER 61. OPSSDR PCAA9600281Prop Contl Unit · malfunctionedDURING TAKEOFF, CREW NOTICED RIGHT PROPELLER RPM WAS 1236. CREW ABORTED TAKEOFF WITHOUT INCIDENT. REMOVED AND REPLACED RIGHT PROPELLER CONTROL UNIT IAW DHC 8 MM. LEAK CHECK AND OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE. (M)SDR CA960524020Control Cable · frayed(CAN)ON DAILY INSPECTION OF ENGINE, #1 ENGINE PROP/CONDITION CABLE CHAFED AND FRAYED AT ENGINE FIRE WALL PULLEY. LOWER CABLE P/N 87600518-001 REPLACED.SDR BDHA960008Nts Wire · failedMSP - FLT 434 - THE CREW REPORTED THE RIGHT ENGINE NTS TEST WAS INOP. MX PERSONNEL REPAIRED WIRE AT LARGE FIREWALL PLUG. TEST WAS PERFORMED AND THE AIRCRAFT WAS RELEASED. (M)SDR GLBA96063Beta Collar · wornSPW - CREW REPORTED, THE RIGHT PROP WENT INTO GROUND FINE DURING FLAIR, MAINTENANCE REMOVED AND REPLACED RIGHT PROP AND ADJUSTED ENGINE RIGGING FOR TORQUE. OPS CHECKS WERE GOOD. (M)SDR COMA9630087Weu · malfunctionedAUTO COURSEN FAULT LIGHT ILLUMINATED DURING GROUND OPS. REPLACED THE WARNING ELECTRONIC UNIT.SDR 96ZZZX2546Beta Cable · out of adjustEYW/TPA - FLT 435A - PILOT REPORT: AFTER TAKEOFF (APPROXIMATELY 200 FEET), RIGHT PROPELLER RPM BEGAN DECREASING, RIGHT TORQUE INCREASED, RIGHT ENGINE WAS SHUT DOWN AND AIRCRAFT RETURNED TO EYW AND LANDED WITHOUT INCIDENT. MAINTENANCE: TROUBLESHOT SYSTEM, RISDR AU960363Rod · faulty(AUS) PROPELLER PITCH CHANGE ROD SUSPECT FAULTY - DIMENSION FROM REAR PISTON SHOULDER TO FRONT RETAINER GROOVE AS ADVISED BY HARTZELLPROPELLERS IS 10.960INCHES (278.384MM) - MEASUREMENTS ON AFFECTED ROD WAS 10.85INCHES (275.59MM) RESULTING IN OVER COMPRESSIONSDR AU960642Control Cable · broken(AUS) LH ENGINE PROPELLER PITCH CONTROL CABLE BROKE AT THE FORWARD ENGINE CABLE MOUNT UNDER THE PROPELLER GOVERNORSDR AU960289Csu · cracked(AUS) PROPELLER CSU END CAP CRACKED AND LEAKING - THE CRACK COMMENCED AT THE FULL FINE CONTROL STOPS AND RADIATED AROUND THE CENTRECOLLAR AND WAS HIDDEN BY THE CONTROL ARM RETURN SPRING - THE END CAP IS MANUFACTURED FROM A BRITTLE PLASTIC TYPE MATERIALSDR 96ZZZX1511Clamp · incorrectCLAMP POSITION FOR REAR MOUNT PROP GOVERNOR EXTERNAL OIL LINE NOT POSITIONED PER AD 90-4-6.SDR 96ZZZX1541Ball Joint · separatedIN-FLIGHT, PROP WENT TO 2700 RPM FROM 2350 RPM. UNABLE TO DECREASE WITH PROP CONTROL. FOUND BALL JOINT SEPARATED FROM PROPELLER GOVERNOR. PROPELLER CONTROL WAS CHANGED LAST OCTOBER, 1995, USING SAME BALL JOINT AT THE LAST ANNUAL. THE BALL JOINT WAS VERY RUSDR PCAA9600272Cable Assy · shortedAUTO FEATHER ARMED ADVISORY LIGHT FLICKERED ON AND OFF DURING CLIMB-OUT. FURTHER TESTING ON GROUND REVEALED NR 2 PROP WOULD NOT FEATHER. TROUBLESHOT AND FOUND RIGHT ENGINE TSCU INTERFACE HARNESS AT FAULT. REMOVED AND REPLACED HARNESS. OPERATIONAL CHECKED GSDR 96ZZZM615Valve Housing · defectiveDURING FLIGHT AD08 NR 2 ENGINE RPM DECAYED TO 97 PERCENT, PRECAUTIONARY SHUTDOWN NR 2 ENGINE AND LANDED SAFELY AT AAB. FOUND NR 2 VALVE HOUSING MALFUNCTIONED, REPLACED VALVE HOUSING, PERFORMED ENGINE RUN, OPS CHECKED GOOD PER J/C 61013 AND 6103.SDR COMA9630049Computer · failedAUTO COARSEN FAIL WARNING DURING TAKEOFF. REPLACED THE AUTO COARSEN COMPUTER.SDR COMA9610092Autofeather Sw · failedAUTOFEATHER SYSTEM DID NOT ARM DURING TAKEOFF. REPLACED THE AUTOFEATHER ARM MICRO SWITCH IN THE POWER LEVER QUADRANT.SDR AU960739Valve · sticking(AUS) PROPELLER CONTROL UNIT CHECK VALVE STICKINGSDR 96ZZZX1644Contl Linkage · out of adjustTLH/TLH - FLT 382 - PILOT REPORT: ON TEST FLIGHT, SHUT DOWN RIGHT ENGINE DUE TO LOW TORQUE. MAINTENANCE: ADJUSTED RIGHT PROPELLER RIGGING FOR CONTINUED SERVICE PRIMARY PROPELLER GOVERNOR, PN 8210212D, INSTALLED PRIOR TO TEST FLIGHT.SDR COMA9610091Aural Warning · activatedAUTOFEATHER AURAL WARNING DURING TAKEOFF. COULD NOT DUPLICATE DISCREPANCY. CLEANED AND TIGHTENED WIRING CONNECTORS AT THE TORQUE SIGNAL CONDITIONERS.SDR COMA9610067Pcu · defectiveLEFT PROPELLER TAKES 15 SECONDS TO UNFEATHER. REPLACED THE PITCH CONTROL UNIT.SDR C2XA96CL012Prop Actuator · leakingGRR - FLIGHT NR 3378 - CREW REPORTED THAT AFTER TAKEOFF THEY HAD NO OIL PRESSURE IN THE LEFT ENGINE. MAINTENANCE INSPECTED AIRCRAFT AND REMOVED AND REPLACED THE LEFT ENGINE PROP ACTUATOR IAW HAMILTON STANDARD MM 61-13-04. OPERATIONAL AND LEAK CHECKS WERE GOOSDR AU960190Governor · faulty(AUS) RH ENGINE PROPELLER GOVERNOR TRANSFER VALVE FAULTY - VALVE ALLOWED FEATHER PUMP PRESSURE TO PARTIALLY BYPASS PREVENTING UNFEATHERING OF PROPELLERSDR AU960122Control Cable · corroded(AUS) FORWARD ENGINE PROPELLER PITCH CONTROL CABLE CORRODED INTERNALLY AND STIFF TO OPERATE - CABLE WAS PURCHASED NEW ON 14/1195 AND HAS BEEN IN SERVICE FOR LESS THAN THREE MONTHS - SUSPECT CABLE WAS INSUFFICIENTLY LUBRICATED AT MANUFACTURE WHICH ALLOWED CORROSDR 96ZZZX885Control Cable · seizedINSTALL NEW CONTROL CABLE ASSY AS SUPPLIED BY CESSNA AIRCRAFT. INSTALLED AND RIGGED PER CESSNA R172K SM. ALL OPS CHECK OK ON GROUND. RUN-UP OPS CHECK OK. FLOWN FOR 2.0 HOURS, NO ATTEMPT TO MOVE CONTROL WHILE IN-FLIGHT. UPON RETURN TO GROUND, GOVERNOR CONTSDR 96ZZZX787Control Cable · brokenRIGHT PROPELLER CONTROL CABLE BROKE ABOUT 12 INCHES AFT OF GOVERNOR ATTACHMENT. NO PRIOR INDICATION OF CABLE FAILURE. PROPELLER CONTROL OPERATED SMOOTHLY.SDR 96ZZZX1277Control Assy · seizedINSTALL NEW CONTROL CABLE ASSY AS SUPPLIED BY CESSNA AIRCRAFT. INSTALLED AND RIGGED PER CESSNA R172K SM AND UNDER THE SUPERVISION OF A CESSNA FIELD SERVICE ENGINEER. ALL OPS CHECK OK ON GROUND. RUN-UPS CHECK OK. FLOWN FOR 2.0 HRS, NO ATTEMPT MADE TO ADJUSTSDR COMA9630027Computer · failedAUTO-COARSEN SYSTEM FAILED DURING TAKEOFF. REPLACED THE AUTO-COARSEN COMPUTER. PART TOTAL CYCLES, 9,434.SDR 96ZZZM322Beta Valve · out of adjustFLT NR 103 - MIA - ON CLIMB-OUT FROM TNT LEFT PROP SPEED INDICATOR STARTED DROPPING THEN SURGING. SHUT DOWN LEFT ENGINE AND DECLARED AN EMERGENCY INTO MIA. LANDED WITHOUT INCIDENT. ADJUSTED LEFT ENGINE BETA VALVE SETTING AND RERIGGED BOTH ENGINES FOR PROPERSDR COMA9610039Seal · defectiveRIGHT ENGINE NP FLUCTUATES. REPLACED PROPELLER TRANSFER TUBE SEALS.SDR 96ZZZX1716Lever Cam · shearedPROPELLER CONTROL UNIT REMOVED PN 8088773 FROM SERVICE, HAD ITS CONDITION LEVER CAM SHEARED. PCU WAS AN EXCHANGE FROM SIMMONS WITH HAMILTON STANDARD ON AUGUST 14, 1994.SDR GLBA96038Prop Governor · malfunctionedMIE - CREW REPORTED, THE LEFT PROP WENT TO GROUND IDLE IN FLIGHT. MAINTENANCE PERFORMED GROUND RUN BUT COULD NOT DUPLICATE PROBLEM DURING OPS CHECK. AIRCRAFT RETURNED TO SERVICE. (M)
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