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 MALA964836Hts Switch · failedFLT 3269 - ON DESCENT TO MSP, THE LEFT OIL PRESSURE WARNING LIGHT ILLUMINATED AND THE LEFT OIL PRESSURE GAUGE INDICATED DECLINING PRESSURE. THE CREW SHUT THE ENGINE DOWN AND CONTINUED TO MSP. MAINTENANCE REPLACED THE NEGATIVE TORQUE SENSOR SWITCH. SYSTEM OPSDR CA960131008Arm Assembly · missing parts(CAN)AFTER START THE LEFT HAND SECONDARY LOW PITCH ANNUNCIATOR WAS NOT ILLUMINATING AS REQUIRED. MAINTENANCE INVESTIGATION REVEALED THE CARBON BRUSH BLOCK OF THE PROPELLER PITCH REVERSING ARM ASSEMBLY WAS MISSING & THE ATTACHING LEVER ARM WAS BENT. THERE WAS SDR COMA9610030Pump · defectiveLEFT ENGINE PROPELLER WILL NOT UNFEATHER. REPLACED THE PROPELLER OVERSPEED GOVERNOR OIL PUMP.SDR COMA9610018Scu · malfunctionedAUTO-FEATHER SYSTEM WILL NOT ARM INTERMITTENTLY. REPLACED THE LT AND RT ENGINE TORQUE SIGNAL CONDITIONER UNITS.SDR AU960013Accumulator · faulty(AUS) PROPELLER ACCUMULATOR EXTERNAL CASING SEVERELY CORRODED AND CHROME FINISH DELAMINATED - WHEN THE END CAPS WERE REMOVED IT WASFOUND THAT THE CHROME FINISH OF THE INTERNAL BORE WAS SEVERELY DELAMINATED AND THE ACCUMULATOR WAS HEAVILY CONTAMINATED WITHCHROSDR HNAA9591231Control Unit · failedCHO/CLT - FLT 3156 - DURING PRE-FLIGHT CHECKS, THE AUTOFEATHER TEST WAS FOUND INOPERATIVE. COULD NOT DUPLICATE. REMOVED AND REPLACED THE NR 1 AND NR 2 TORQUE SENSOR CONTROL UNITS. REFERENCE CONTROL NR 96ZZZX323. (X)SDR 96ZZZX323Control Unit · failedCHO/CLT - FLT 3156 - DURING PRE-FLIGHT CHECKS, THE AUTOFEATHER TEST WAS FOUND INOPERATIVE. COULD NOT DUPLICATE. REMOVED AND REPLACED THE NR 1 AND NR 2 TORQUE SENSOR CONTROL UNITS. REFERENCE CONTROL NR HNAA9591231.SDR HNAA9592429Control Unit · failedBWI/RDU - FLT 3393 - THE AUTOFEATHER WOULD NOT ARM ON TAKEOFF. THE TAKEOFF WAS ABORTED AND THE AIRCRAFT RETURNED TO THE GATE WITHOUT INCIDENT. REMOVED AND REPLACED THE NR 1 TORQUE SENSOR CONTROL UNIT. (X)SDR IXXA95135Actuator · failedEN ROUTE FROM KLCK TO TJSJ, THE FLIGHT CREW SMELLED THE STRONG ODOR OF ELECTRICAL SMOKE, AND OBSERVED THAT THE PITCH TRIM COMPENSATION LIGHT FLICKERED SEVERAL TIMES. THE PTC WAS TURNED OFF AND ITS CIRCUIT BREAKER PULLED, AT WHICH TIME THE FUMES STOPPED. INSPSDR 96ZZZX396Switch · failedRIGHT LOW PITCH ANNUNCIATOR INOPERATIVE. SYSTEM OPERATIVE, LIGHT BULB OK. REPLACED RT SWITCH ASSY, AND CORRECTED PROBLEM. SUBMITTER STATED THESE SWITCHES ARE NOT VERY DEPENDABLE, MAYBE SWITCH DESIGN NOT COMPATIBLE WITH ENVIRONMENT WHERE INSTALLED, TEMPERATUSDR 96ZZZX395Switch · failedON PRE-FLIGHT DEPARTURE RUN-UP AND OPERATIONAL CHECK, DISCOVERED LEFT PROPELLER PITCH LIGHT INOPERATIVE. REPLACED PROXIMITY SWITCH, CORRECTED THE DEFECT. SUBMITTER STATED THIS IS THE THIRD LOW PITCH STOP PROXIMITY SWITCH FAILURE IN 413 HOURS, AIRFRAME TIME SSDR SRAA129503Valve Housing · damagedFLT NR 9006 - SNN-YQX - NR 1 ENGINE RPM SLOWLY DECAYED TO 98 PERCENT WHILE SLAVING TO NR 2 ENGINE AS MASTER. WITH NO MASTER SELECTED, NR 1 PROP GOES TO 96.7 PERCENT. SHUT DOWN NR 1 ENGINE AND ACCOMPLISHED AIR TURN BACK TO SNN. FOUND NR 1 PROP VALVE HOUSING SDR SRAA129502Valve Housing · inoperativeDURING FLIGHT MAD08 TO MHZ, NR 3 ENGINE RPM DECAYED TO 97 PERCENT AND TORQUE WAS 5,000-10,000 INCHES/POUNDS AT FLIGHT IDLE (DEPENDING ON ALTITUDE), SHUT DOWN ENGINE AND LANDED SAFELY AT MHZ. REPLACED NR 3 ENGINE PROP VALVE HOUSING, PROP RIGGED AND PERFORMED ESDR 96ZZZM1127Wire · brokenFLT 731 - RETURNED TO ANC DUE TO LOSS OF CONTROL ON NR 3 PROPELLER. MAINTENANCE REPAIRED PROP GOVERNOR WIRING FROM GOVERNOR TO NOSE CASE J-BOX. AIRCRAFT RETURNED TO SERVICE. (M)SDR WTAA950307Prop Governor · out of adjustRDM - RIGHT ENGINE OBTAINS ONLY 97 PERCENT RPM ON TAKEOFF ROLL WITH SPEEDS HIGH. TAKEOFF ABORTED WITHOUT INCIDENT. MAINTENANCE ADJUSTED RIGHT ENGINE PROP GOVERNOR CONTROLS. ENGINE OPERATION NORMAL DURING GROUND RUN. AIRCRAFT RETURNED TO SERVICE. (M)SDR COMA9512011Pcu · defectiveLEFT PROPELLER BETA INDICATOR IS FLASHING ON AND OFF AND PROP IS LURCHING. REPLACED THE PROPELLER PITCH CONTROL UNIT.SDR COMA9531191Pcu · defectiveRT PROPELLER WILL NOT MAINTAIN 100 PERCENT RPM DURING TAKEOFF AND APPROACH. REPLACED THE PROPELLER PITCH CONTROL UNIT.SDR SWIA95677Engine · rpm wanderLT RPM IS WANDERING UP AND DOWN 2 PERCENT MOSTLY IN DESCENT ANYTIME THERE IS A PITCH CHANGE, RPM CHANGES, OCCASIONAL VIBRATION FROM LT PROP. INSPECTED LT ENGINE RIGGING AND PERFORMED OPERATIONAL CHECK OF ENGINE ON GROUND, OPS CKS GOOD. ENGINE PERFORMING WITHSDR CA951122031Prop Cont Unit · faulty(CAN) A FACTORY REPAIRED PROPELLER CONTROL UNIT (PCU) HAVING SERVICE BULLETINS 14RF-9-61-22, -26, -32, -34, -38, -43, -45, -51, -60, -61 INCORPORATED WAS INSTALLED ON THE #2 ENGINE DURING A 400 HOURS/400 CYCLE INSPECITON ("A" CHECK). DURING RUN-UP FOR SERVICESDR SRAA119502Valve Housing · failedRMS - FLT ADT4 - DURING FLIGHT INTO RMS, NR 4 PROPELLER FLUCTUATED OUT OF LIMITS, FEATHERED PROP AND SHUT DOWN NR 4 ENGINE. REPLACED NR 4 PROPELLER VALVE HOUSING AND RIGGED PROP PER JOB CARDS 6103 AND 6101-1, PERFORMED ENGINE RUN-UP. OPS CHECKED GOOD IAW MM SDR MEJA951007Nts Orifice · crackedFLIGHT FAE 131, DTW TO SAT, WHILE IN CRUISE, THE LEFT ENGINE OIL PRESSURE WARNING LIGHT ILLUMINATED AND THE PRESSURE INDICATOR DECREASED BELOW 40 PSI. THE FLIGHT CREW SHUT DOWN THE ENGINE AND LANDED AT CMI WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND A DEFECTSDR 95ZZZX7059Cable · chafedDURING 100-HOUR INSPECTION, FOUND PROPELLER GOVERNOR CABLE CHAFES ON C-FLANGE OF POWER PLANT. SUBMITTER RECOMMENDS PUTTING BRACKET WITH CLAMP TO KEEP FROM CHAFING. RE: MANUAL, CHAPTER 76, SUB-CHAPTER 10, ITEM NR T700A7610049000.SDR SRAA109511Valve Housing · failedFLT AU80 - DNA - DURING FLIGHT NR 2 PROPELLER RPM DROPS TO 97 PERCENT IN BOTH NORMAL OR MECHANICAL GOVERNING. SHUT DOWN NR 2 ENGINE RUN UP, OPS CHECKED GOOD PER JC 7101, AND 7101-2. (M)SDR COMA9531173Connectors · dirtyAUTO COARSEN FAILED DURING TAKEOFF. CLEANED CONNECTIONS AT THE P3 ARMING SWITCHES.SDR WWMA9500067Monopole · intermittentDURING EN ROUTE PORTION OF FLIGHT, THE LEFT ENGINE TORQUE AND EGT DROPPED RADICALLY WITH THE POWER LEVERS MATCHED. CREW PERFORMED A PRECAUTIONARY LANDING IN SBP WITHOUT INCIDENT. DURING DEBRIEF THE CREW REPORTED THAT THE LEFT TORQUE HAD DROPPED 20 PERCENT. SDR UF6A951004Pcu · failedORD - RIGHT PROPELLER WILL NOT FEATHER ON SHUTDOWN. MAINTENANCE REMOVED AND REPLACED PCU. (M)SDR UF6A951003O-Ring · failedORD - FLT 5092 - RIGHT PROPELLER WOULD NOT FEATHER ON SHUT-DOWN. MAINTENANCE REMOVED AND REPLACED TRANSFER TUBE O-RING. (X)SDR COMA951170Overspeed Syst · no testLT PROPELLER OVERSPEED SYSTEM DOES NOT TEST. COULD NOT DUPLICATE, SYSTEM TEST NORMAL AND ACFT CONTINUED SERVICE.SDR C2XA95CL121Prop Brake · failedEWR - FLT NR 3614 - PRIOR TO AIRCRAFT TAXI, PROP BRAKE FAILED CAUSING ENGINE NR 2 TO CATCH ON FIRE. THE NR 1 AND NR 2 FIRE BOTTLES WERE DISCHARGE. MAINTENANCE INSPECTED THE NR 2 ENGINE AND FOUND THE PROP BRAKE TO HAVE OVERHEATED. MAINTENANCE REMOVED AND REPSDR UF6A950906Pcu · malfunctionedORD - FLT 5009 - RIGHT PROPELLER WOULD NOT FEATHER ON SHUT-DOWN. MAINTENANCE PERFORMED OPERATIONAL CHECK, OPS CHECK GOOD. (X)SDR MALA954651Switch · stickingFLT 3242 - AFTER TAKEOFF FROM MSP, THE RIGHT BETA LIGHT ILLUMINATED. THE AIRCRAFT RETURNED TO MSP WITHOUT INCIDENT. MAINTENANCE PERSONNEL FOUND THE RIGHT BETA SWITCH TO BE STICKING AND REPLACED THE SWITCH. ALL SYSTEMS OPERATED SATISFACTORILY. (M)SDR SRAA99513Valve Housing · malfunctionedLAE - FLT 1093 - DURING TAKEOFF ROLL, NR 3 PROP FLUXED 1 TO 2 PERCENT, TORQUE WAS HIGHER THAN OTHER ENGINES, SHUT DOWN ENGINE AS PRECAUTIONARY. FOUND VALVE HOUSING NOT FUNCTIONING PROPERLY. REPLACED NR 3 PROP VALVE HOUSING ASSY. PERFORMED ENGINE RUN-UP, OPSSDR 95ZZZX6128Tq Control Unit · failedTPA/JAX - FLT 3166 - AFTER TAKEOFF DURING CLIMB, THE AUTOFEATHER ARM LIGHT ILLUMINATED INTERMITTENTLY. THE AIRCRAFT CONTINUED ON TO JAX AND LANDED WITHOUT INCIDENT. REMOVED AND REPLACED THE NR 2 TORQUE SENSOR CONTROL UNIT.SDR 95ZZZX6273Linkage · out of adjustABE/IAD - FLT 6154 - DURING TAKEOFF AT 2222 HRS ON 9-22-95, ABORTED TAKEOFF DUE TO RT ENGINE BETA LIGHT NOT EXTINGUISHING UNTIL THE ENGINE RPM REACHED 104 PERCENT. ALSO, THE TORQUE HUNG AT 23 PERCENT. AIRCRAFT RETURNED TO GATE WITH NO FURTHER INCIDENTS. MAISDR SRAA99508Prop Control · malfunctionedDURING CLIMB-OUT FOR FLIGHT ADT3 FROM MHZ, NR 1 PROPELLER LOST TORQUE AND TIT WENT TO 1100 DEGREES, NR 1 ENGINE WAS SHUT DOWN AND WHILE FEATHERING PROP, CREW FELT JOLT TO AIRCRAFT, ACCOMPLISHED AIR TURN BACK TO MHZ. THREE ENGINE FERRY AIRCRAFT TO CAMBRIDGE, ISDR UF6A950904Pcu O-Ring · failedGRB - FLT 5060 - PROPELLER'S NR 1 OIL PRESSURE LIGHT ON CENTRAL WARNING PANEL, ILLUMINATED DURING TAKEOFF ROLL. MAINTENANCE REMOVED AND REPLACED PROPELLER CONTROL UNIT O-RING. A/C TT: 7,615 HRS. (X)SDR COMA9511965Pcu · defectiveRT PROPELLER FEATHERED DURING TAKEOFF. FDR DATA INDICATED TORQUE REACHED 132 PERCENT. REPLACED PROPELLER DUE TO OVER TORQUE AND REPLACED PROPELLER PITCH CONTROL FOR UNCOMMANDED FEATHERING.SDR COMA9511963Pcu Linkage · wornLEFT ENGINE DID NOT SHUTDOWN WHEN CONDITION LEVER SELECTED TO FUEL OFF. FOUND THE PROPELLER PITCH CONTROL LINKAGE TO BE WORN AND REPLACED THE PCU.SDR 95ZZZM695Beta Linkage · out of adjustIMMEDIATELY AFTER LIFT OFF FROM ANC, NR 2 ENGINE AUTO FEATHERED. AIRCRAFT RETURNED TO ANC AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND BETA LINKAGE OUT OF ADJUSTMENT RIGGED BETA, TORQUE AND PROPELLER LINKAGES. ENGINE RUN AND AUTO FEATHER SYSTEM CHECK NORMSDR COMA9531151Computer · inoperativeDURING TAKEOFF ROLL, AUTO-COARSEN WARNING LIGHT ON CENTRAL WARNING PANEL CAME ON, ABORTED TAKEOFF. REMOVED AND REPLACED AUTO-COARSEN COMPUTER WITH SERVICEABLE UNIT.SDR 95ZZZX5644Pitch Change Rod · severedSECOND BEFORE ROTATION, A LOUD BANG AND LOSS OF POWER ON NR 1 ENGINE OCCURRED. PROPELLER WENT INTO FEATHER. INSPECTION OF NR 1 ENGINE, NO DEFECTS FOUND, BUT ENG WOULD NOT TURN MORE THAN 600 RPM. PROPELLER WOULD NOT COME OUT OF FEATHER. REPLACED PROPELLER. SDR 95ZZZX5202Tscu · failedPBY/TPA - FLT 3031 - ON TAKEOFF, THE NR 1 ENGINE PROPELLER FEATHERED. THE CREW ABORTED THE TAKEOFF AND RETURNED TO THE GATE WITHOUT INCIDENT. REMOVED AND REPLACED THE NR 1 TORQUE SENSOR CONTROL UNIT AND CLEANED BOTH TSCU CONNECTORS.SDR 95ZZZX5923Linkscrew · pin shearedREMOVING PROPELLER TO CHECK FOR AN OIL LEAK, PIN, PITCH CHANGE, AND BLOCK FELL TO GROUND (LINKSCREW). FOUND PIN SHEARED IN HALF FOR REASONS UNKNOWN. PIN WAS .4375 INCH DIAMETER. MFG CLAIMS PIN SIZE INCREASED TO .50 INCH DIAMETER IN 1957 DUE TO HISTORY OF .4SDR COM31143Switch · defectiveAUTO COARSEN WARNING DURING TAKEOFF. REPLACED THE AUTO COARSEN ARMING P3 PRESSURE SWITCH.SDR BDHA9500018Prop Governor · out of adjustMSP - FLT 447 - RIGHT ENGINE WAS SURGING WHEN SET TO TAKEOFF POWER. AIRCRAFT RETURNED TO HANGER AND MAINTENANCE ADJUSTED THE PROP GOVERNOR LOW SETTING. RUN UP TEST WAS SATISFACTORY, AND AIRCRAFT WAS RETURNED TO SERVICE. (M)SDR 95ZZZX4530Solenoid · failedGROUND IDLE SOLENOID FAILED ON THE LT ENGINE. DURING LANDING, THE LT PROPELLER REMAINED IN FLIGHT IDLE AND THE RT PROPELLER WENT INTO GROUND IDLE (FLATTER PITCH). THIS MADE FOR DIFFICULT HANDLING DURING LANDING ROLL-OUT.SDR PLGA81895G1Connector Pin · failedFLTN 4787 - ON FINAL INTO PWM, THE RIGHT PROP RPM DROPPED TO 1160 WITH THE CONDITION LEVER AT MAX. ON THE GROUND, THE CREW WAS UNABLE TO FEATHER THE PROPELLER WITH THE CONDITION LEVER. MAINTENANCE WAS DISPATCHED TO THE AIRCRAFT AND FOUND THAT THE BALL JOINT SDR WTAA950249Prop Governor · out of adjustFAT - RIGHT ENGINE TORQUE DROPPED OFF DURING TAKEOFF ROLL DUE TO POSSIBLE FUEL BYPASSING. TAKEOFF ABORTED WITHOUT INCIDENT. MAINTENANCE DEFERRED RIGHT ENGINE TTL SYSTEM PER MEL 76-2. AIRCRAFT RETURNED TO SERVICE. MAINTENANCE SUBSEQUENTLY RIGHT PROP RPM (SCSDR COM31131Press Switch · defectiveAUTO COARSEN WARNING ON CWP. FLIGHT RETURNED TO EVV. REPLACED THE AUTO COARSEN P3 PRESSURE SWITCHES.SDR SRAA79512Rod · brokenAET - FLT NR 1973 - ON LANDING, NR 1 PROPELLER FAILED TO REVERSE, LOW PITCH STOPS DID NOT RETRACT. FOUND INTERMEDIATE PROP CONTROL ROD BROKEN. REPLACED ROD AND PERFORMED OPS CHECK PER MM CHAPTER 76. (M)
Back to JASC 6120