Cessna 172R

Service difficulty reports · 568

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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 aircraft_model_key = '172R'
  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.

SDR 98ZZZX4572Web · crackedDURING A ROUTINE INSPECTION, THE FIREWALL WAS FOUND CRACKED AT THE COWL MOUNT JUST BELOW THE BATTERY BOX. THE CRACK WAS APPROXIMATELY 4 INCHES IN LENGTH. SUBMITTER STATED POSSIBLE CAUSE AS USE OF A THINNER FIREWALL AND NO LOAD BEARING SURFACE FOR THE LORD MONov 6, 1998 · N782WW · Cessna 172R · Fuselage Main, BulkheadSDR 98ZZZX4500Muffler · crackedCRACK FOUND AROUND HEAT SHROUD SUPPORT COLLAR. TT ON MUFFLER, 100.0 HOURS.Nov 5, 1998 · N723HG · Cessna 172R · Engine Noise SuppressorSDR 98ZZZX4499Muffler · crackedCRACK FOUND AROUND HEAT SHROUD SUPPORT COLLAR. TT ON MUFFLER, 98.2 HOURS.Nov 5, 1998 · N724HG · Cessna 172R · Engine Noise SuppressorSDR 98ZZZX4315Skin · crackedDURING A ROUTINE INSPECTION, NOTED BOTH LT AND RT TRAILING EDGE SKINS IN THE FLAP WELLS HAD MULTIPLE CRACKS RANGING FROM .25 INCH TO 2 INCHES EMANATING FROM RIVET HOLES. MAINTENANCE CHECKED ALL TRAVEL OF THE FLAPS, FLAP TRAVEL WAS WITH SPECS AND NOT HITTING TNov 2, 1998 · N97100 · Cessna 172R · Trailing Edge FlapsSDR 98ZZZX4314Skin · crackedDURING ROUTINE MAINTENANCE, BOTH FLAP LEADING EDGE SKINS WERE FOUND CRACKED. CRACKS WERE AROUND THE RIVET HOLES WERE P/N 0523923 26, ATTACHES TO FLAPS ON THE BOTTOM SIDE. CRACKS WERE .25 INCH - .50 INCH IN LENGTH, AND ALMOST EVERY RIVET HOLE WAS AFFECTED. SNov 2, 1998 · N97100 · Cessna 172R · Trailing Edge FlapsSDR 98ZZZX4523Line · cloggedPERFORMED FUEL LEAK CHECK AND NOTICED FUEL WAS NOT OVERFLOWING FROM INDICATION ELBOW FUEL DRAIN LINE. REMOVED INDUCTION ELBOW FUEL DRAIN LINE. REMOVED INDUCTION AIR FILTER AND FOUND INDUCTION ELBOW FULL OF 100LL. REMOVED INDUCTION ELBOW FUEL DRAIN LINE AND Nov 1, 1998 · N500ER · Cessna 172R · Aircraft Fuel Distribution SystemSDR 98ZZZX4252Line · chafedDURING ANNUAL INSPECTION WHEN THE RT BRAKE FAIRING (P/N 0541124-2) WAS REMOVED, DISCOVERED THE LOWER FAIRING SCREWS (P/N 5102126-6) HAD CHAFED INTO THE BRAKE LINE ASSY LOWER SIDE. THE CORRECT LENGTH SCREW WAS INSTALLED PER IPC. THIS IS AN AREA NOT EASILY SEEOct 30, 1998 · N385ES · Cessna 172R · BrakeSDR 99ZZZX299Mcu · malfunctionedCIRCUIT PROTECTION FOR AVIONICS IS PROVIDED BY TWO 30-AMP AUTOMOTIVE TYPE SPADE FUSES PLUGGED INTO A 'FUSE PANEL'. FUSE PANEL IS HOUSED IN A 'J' BOX CALLED THE 'MASTER CONTROL UNIT'. PROBLEM IS SPECIFIC TO 'FUSE PANEL' BURNING METAL SPADE TERMINALS OF 30-AMPOct 29, 1998 · N441ER · Cessna 172R · DC Power Distribution SystemSDR 99ZZZX308Indicator · failedA DIODE INSIDE THE GPS HAD SHORTED OUT, BUT DUE TO THE MOUNTING TECHNIQUE OF THE BREAKER PANEL THE BREAKER DID NOT TRIP. THUS, THE GPS STILL HAD POWER, CONTINUING TO BURN THE DIODE. THIS CAUSED SMOKE IN COCKPIT ALONG WITH THE ACCOMPANYING SMOKE SMELL.Oct 28, 1998 · N101FV · Cessna 172R · Global Positioning SystemSDR 99ZZZX979Wire · chafedPILOT'S CONTROL WHEEL SHAFT PICKED UP WIRE BUNDLE WHERE IT RUNS UNDER THE SHAFT. THIS PINCHED THE BEACON WIRE BREAKING THROUGH THE INSULATION AND BURNING THE WIRE IN HALF.Oct 26, 1998 · N406ER · Cessna 172R · Emergency Locator BeaconSDR 98ZZZX4332Ecu · failedA BUS 2 FAILURE WAS OBSERVED WHEN THE AUDIO PANEL, NAV/COM 1 AND GPS FAILED WHICH RESULTED IN A LOSS OF COMMUNCIATION. THE FAULT WAS LOCATED AT THE JUNCTION OF THE BUS 2 WIRE AND F2 FUSE HOLDER TERMINAL IN THE EPCU. THE SOLDER JOINT HAD BROKEN DUE TO A LACK OOct 1, 1998 · N419ER · Cessna 172R · DC Generator-AlternatorSDR 98ZZZX4316Bearing · missingPILOT REPORTED 'MUSHY' BRAKE RESPONSE FROM COPILOT'S LEFT PEDAL. INSPECTION REVEALED VERY LOOSE PEDAL. FOUND BEARING FOR PEDAL TORQUE TUBE MISSING. SUBMITTER SUSPECTED BEARING WAS NOT INSTALLED AT FACTORY. REPLACED BEARING. OPS CHECK OK. AC TT: 146.6 HOOct 1, 1998 · N857CP · Cessna 172R · Rudder Control SystemSDR 99ZZZX101Wire · chafedP/N SACU-BMN001 POSITIVE BATTERY WIRE AT ALTERNATOR CHAFED HOLE IN P/N 0555228-24 BAFFLE ASSY, RIGHT FORWARD ENGINE COMPARTMENT. THIS BEING NEW 172 WITH 337.2 TT HOURS, RECOMMEND MANDATORY SB OR POSSIBLE AD.Sep 25, 1998 · N234CF · Cessna 172R · Battery/Charger SystemSDR CA981001005Firewall · cracked(CAN) CRACKS FOUND ON THE LOWER FIREWALL NEAR THE COWL MOUNT BRACKETS. AIRCRAFT HAS LESS THAN ONE YEAR IN SERVICE.Sep 22, 1998 · Cessna 172R · Nacelle/Pylon, Bulkhead/FirewallSDR 98ZZZX4086Blade · corrodedDURING 100-HOUR INPSECTION, SEVERE CORROSION NOTED ON BLADE BACK. FLAKING TYPE CORROSION INDICATING IMPROPER HEAT TREATMENT. SUBMITTER STATED FIVE TYPE OCCURRENCES COMPANY WIDE. ALL REQUIRED PROP REPLACEMENT. PROPELLER TO BE REPLACED BY MCCAULEY.Sep 22, 1998 · N24AF · Cessna 172R · Propeller Blade SectionSDR 98ZZZX4085Blade · corrodedINSPECTION OF PROPELLER INDICATES FLAKING CORROSION ON 3 PLACES ON THE BLADE FACE. PROPELLER TO BE REPLACED BY MCCAULEY.Sep 22, 1998 · N53AF · Cessna 172R · Propeller Blade SectionSDR 98ZZZX4123Muffler · crackedWHILE PERFORMING THE AIRCRAFT'S FIRST ANNUAL INSPECTION, THE MUFFLER END FLANGE (ONE OF THEM) WAS FOUND TO HAVE A CRACK ALONG THE WELD EMANATING ABOUT ONE-THIRD OF THE CIRCUMFERENCE OF THE FLANGE. THE MUFFLER WAS REPLACED WITH A NEW UNIT. PART ONLY HAD 207 HSep 10, 1998 · N992CP · Cessna 172R · Engine Noise SuppressorSDR 98ZZZX3454Valve · leakingDURING 100-HOUR INSPECTION, FUEL SHUT-OFF VALVE LOCATED UNDER RIGHT SIDE FLOOR PLATE FORWARD OF HEADER TANK WAS FOUND LEAKING FUEL FROM THE VALVE BODY SEAL AND SHAFT. FUEL SMELL WAS EVIDENT IN CABIN AND FOUND RT SIDE SUB-FLOOR WAS COVERED IN FUEL DYE. UNIT WSep 3, 1998 · N18AF · Cessna 172R · Fuel Selector/Shut-Off ValveSDR 98ZZZX4584Filter · saturatedPILOT REPORTED LOSS OF POWER DURING LEVEL CRUISE FLIGHT. WEATHER CONDITIONS PREVAILING WERE 1/8 MILE, MODERATE RAIN. IT IS SUSPECTED THE INDUCTION AIR FILTER BECAME SATURATED AND THE ALTERNATE AIR DOORS WERE TOO SLOW IN OPENING. TWO SIMILAR INCIDENTS HAVE BAug 29, 1998 · N995CP · Cessna 172R · Engine Air Intake SystemSDR 98ZZZX3470Vent Line · blockedOWNER COMPLAINED OF NO FUEL FLOW FROM RT FUEL TANK SINCE TAKING DELIVERY OF ACFT WITH 88.2 HRS ON ACFT. ATTEMPTED TO RE-POSITION VENT LINES, CHECK VENT SYS AND FUEL FLOW, BUT COULD NOT FIX PROBLEM. TECH REP CONTINUED TO T/S SYS EACH TIME CHECKING A DIFFERENTAug 8, 1998 · N9392F · Cessna 172R · Fuel StorageSDR 98ZZZX3197Flow Divider · scoredPILOT REPORTED ENGINE QUIT DURING RECOVERY FROM A STALL AT 3,000 FEET AGL. PILOT WAS ABLE TO RESTART ENGINE AND FLY ACFT BACK TO AIRPORT SAFELY. ENGINE WAS IDLING ROUGH. MAINTENANCE REMOVED COVER AND FOUND SCORING AND SMALL METAL FLAKES INSIDE OF THE FLOW DJul 28, 1998 · N181MW · Cessna 172R · Fuel DividerSDR 98ZZZX3020Pump · leakFOLLOWING THE FINDING OF A FUEL bOOST PUMP LEAK ON ANOTHER AIRCRAFT (SISTER ACFT), INSPECTION FOUND SIMILAR LEAK. PUMP WAS REPLACED.Jul 23, 1998 · N83AF · Cessna 172R · Fuel Boost PumpSDR 98ZZZX3019Pump · leakDURING A 100-HOUR INSPECTION, NOTED FUEL WAS LEAKING FROM PUMP DRAIN TUBE. OPERATION OF THE PUMP RESULTED IN A STEADY FLOW OF FUEL FROM THE DRAIN. A CHECK OF SISTER PLAN N93AF, 17280073, PRODUCED SIMILAR DEFECT. PUMPS ON BOTH PLANES HAVE BEEN REPLACED WITH Jul 23, 1998 · N77AF · Cessna 172R · Fuel Boost PumpSDR 98ZZZX2987Servo · malfunctionedPILOT SQUAWKED GRINDING NOISE WHEN AILERON WAS MOVED UP AND DOWN. WHEN TROUBLESHOOTING, FOUND NOISE COMING FROM SERVO. WHEN OPERATING ON THE GROUND, LIGHT WOULD COME ON AND HORN WOUULD GO OFF SAYING THAT AUTOPILOT WAS DISENGAGED, EXCEPT SERVO OUT AT WING WASJul 23, 1998 · N9710F · Cessna 172R · Autopilot Main ServoSDR 98ZZZX3202Fuel Servo · malfunctionedPILOT REPORTED ENGINE QUIT IN-FLIGHT AND REQUIRED A DEAD STICK LANDING. ENGINE RESTARTED ON THE GROUND AFTER A SAFE LANDING. MAINTENANCE MADE ADJUSTMENTS TO FUEL SERVO AFTER NOTICING HIGHLY ERRATIC FUEL FLOW INDICATIONS. ALL GROUND CHECKS WERE NORMAL. ACFTJul 17, 1998 · N360ES · Cessna 172R · Fuel Control/Reciprocating EnginesSDR 98ZZZX3201Fuel Servo · malfunctionedPILOT REPORTED LOSS OF ENGINE POWER AT 500 FEET AGL ON TAKEOFF AND AGAIN ON FINAL. PILOT MADE A SAFE LANDING. DURING TAXI BACK, MAINTENANCE PERSONNEL NOTICED ENGINE RUNNING EXTREMELY ROUGH. DURING TROUBLESHOOTING ON SUBSEQUENT MAINT RUNS, THE FUEL FLOW GAUGJul 17, 1998 · N360ES · Cessna 172R · Fuel Control/Reciprocating EnginesSDR 98ZZZX3200Fuel Servo · malfunctionedPILOT REPORTS ERRATIC ENGINE OPERATION AT LOW POWER SETTINGS AND APPEARED TO BE 'MISFIRING' ON FINAL. MAINTENANCE PERSONNEL RAN ENGINE AND NOTICED AT ANY RPM BELOW 1,500, ENGINE WOULD 'LOPE' AND WAS ACCOMPANIED BY ERRATIC FUEL FLOW INDICATIONS. FUEL SERVO WAJul 17, 1998 · N360ES · Cessna 172R · Fuel Control/Reciprocating EnginesSDR 98ZZZX3199Fuel Servo · scoredDURING MAINTENANCE FLIGHT WHILE CHECKING THE OPERATION OF THIS FUEL SERVO, ON THE THIRD APPROACH, ENGINE STARTED TO MISS AT REDUCED POWER SETTINGS. GO-AROUND, WHEN ACFT TURNED FINAL AND UPON POWER REDUCTION, THE ENGINE LOST POWER AND UPON ADVANCEMENT OF THE TJul 17, 1998 · N360ES · Cessna 172R · Fuel Control/Reciprocating EnginesSDR 98ZZZX3198Fuel Servo · scoredWHILE DOING A GROUND RUN-UP PRIOR TO A 100-HOUR INSPECTION, MAINTENANCE NOTICED THE ENGINE, UPON REACHING OPERATING TEMP, BEGAN TO RUN ROUGH AT LOWER POWER SETTINGS. THE FUEL FLOWS ALSO WERE EXTREMELY ERRATIC. NO FURTHER ACTION HAS BEEN TAKEN. THIS IS AN ORJul 17, 1998 · N97100 · Cessna 172R · Fuel Control/Reciprocating EnginesSDR 98ZZZX3203Fuel Servo · malfunctionedPILOT REPORTED ON ENGINE RUN-UP AT LOWER POWER SETTING, ENGINE RAN ROUGH AND WAS DIFFICULT TO KEEP RUNNING. MAINTENANCE NOTICED ON GROUND RUN-UPS, ERRATIC FUEL FLOW INDICATIONS THAT CORRESPONDED WITH THE ENGINE ROUGHNESS. A NEW UNIT WAS INSTALLED AND FLIGHT Jul 16, 1998 · N172SJ · Cessna 172R · Fuel Control/Reciprocating EnginesSDR 98ZZZX3124Servo · malfunctionedDURING THE MID-AFTERNOON, AIRCRAFT HAD TO DO AN ABORTED TAKEOFF AFTER AIRCRAFT JUST BROKE GROUND AND ENGINE QUIT. AIRCRAFT WAS REFIRED AND TAXIED TO HANGAR. TEST RAN AIRCRAFT AND FOUND MIXTURE WAS EXCESSIVELY RICH. SUBMITTER STATED HAVING PROBLEMS WITH THE Jul 13, 1998 · N441CA · Cessna 172R · Fuel Control/Reciprocating EnginesSDR 98ZZZX2680Muffler · crackedFOUND THE HEATER MUFFLER CRACKED AROUND THE FLANGE AREA ALONG THE WELD. THIS MAKES SECOND ONE SEEN WITH LESS THAN 200 HOURS TT. CRACK WAS APPROXIMATELY 6 INCHES. SUBMITTER STATED ONLY AFFECTS THE 172R MODELS.Jul 13, 1998 · N441CA · Cessna 172R · Engine Collector/Tailpipe/NozzleSDR 98ZZZX2679Support · failedPEEL AND STICK ELECTRICAL WIRE SUPPORTS COMING LOOSE. INTERFERRING WITH FLAP BELLCRANKS, CONTROL CABLES, AND RUBBING ON AIRCRAFT STRUCTURE. SUBMITTER STATED ONLY EFFECTS THE 172R MODEL.Jul 13, 1998 · N441CA · Cessna 172R · DC Power Distribution SystemSDR 98ZZZX2678Hinge · wornLOWER RUDDER ATTACH POINT HINGES EXCESSIVE WEAR. IT APPEARS THE ATTACH POINT HOLE WAS DRILLED OVERSIZE IN ORDER FOR ALL 3 ATTACH POINTS TO ALIGN UP.Jul 13, 1998 · N441CA · Cessna 172R · Rudder StructureSDR 98ZZZX2700Strainer · separationTHREADS BROKEN AND SUBSEQUENT SEPARATION OF THE BOWL AT GASCOLATOR ON THE NEW 172R DURING DISMANTLING ON THE FIRST 100 HOUR INSPECTION. INTERNAL INSPECTION HAS REVEALED THAT ONLY TWO THREADS WORKED FROM STANDPIPE 0756036-2 AND TOP ASSY 0756039-6. AIRWORTHINEJun 25, 1998 · N1FACN · Cessna 172R · Aircraft Fuel Filter/StrainerSDR 98ZZZX2699Control Cable · misroutedWHILE PERFORMING CESSNA SB 98-27-06, FOUND ELEVATOR TRIM CABLES ROUTED WRONG. (CABLES SWITCHED AROUND ON PULLEYS). TRIM TAB DOWN TRAVEL WAS ALSO INCORRECT. FOUND 19 DEGREES, LIMIT IS 15 DEGREES, PLUS OR MINUS ONE DEGREE. TRIM CABLE TENSION WAS TOO HIGH. WJun 25, 1998 · N9730F · Cessna 172R · Elevator Tab Control SystemSDR 98ZZZX2461Alternator · shortedALTERNATOR FAILED DUE TO BATTERY AND GROUND WIRE TERMINALS BREAKING OFF AND SHORTING TO ALTERNATOR. SUBMITTER STATED TERMINALS WEAK. MATERIAL TOO THIN FOR GAUGE OF WIRE.Jun 16, 1998 · N9572W · Cessna 172R · DC Generator-AlternatorSDR 98ZZZX2287Seat Lock · failedDURING A PHASE INSPECTION, THE MECHANIC FOUND THE LEFT SEAT LOCK CONTROL ASSY BROKEN. THIS IS THE THIRD CABLE BROKEN IN A FLEET OF FIFTEEN.Jun 5, 1998 · N404ER · Cessna 172R · Flight Compartment EquipmentSDR AU980559Trim Tab · mismanufactured(AUS) ELEVATOR TRIM OPERATES IN REVERSE SENSE. SUSPECT CAUSED WHEN THE AIRCRAFT IS REASSEMBLED IN AUSTRALIA FOLLOWING RECEIPT FROM THE FACTORY USING THE ILLUSTRATION IN THE MAINTENANCE MANUAL AS A GUIDE. MANUFACTURING ERROR.May 21, 1998 · Cessna 172R · Elevator Tab Control SystemSDR AU980558Control Cable · misinstalled(AUS) AILERON CABLE IN RT WING IS ROUTED OVER THE AUTOPILOT SERVO PULLEY AND OVER THE AILERON CABLE PULLEY RESULTING IN THE CABLE BEING PULLED OUT OF ALIGNMENT CAUSING A LARGE CABLE DEFLECTION THAT HAS THE CABLE RIDING ON THE COTTER PIN CABLE KEEPER INSTEAD OFMay 21, 1998 · Cessna 172R · Aileron Control SystemSDR AU980554Control Cable · misinstalled(AUS) AILERON CABLE IN RT WING IS ROUTED OVER THE AUTOPILOT SERVO PULLEY AND OVER THE AILERON CABLE PULLEY RESULTING IN THE CABLE BEING PULLED OUT OF ALIGNMENT CAUSING A LARGE CABLE DEFLECTION THAT HAS THE CABLE RIDING ON THE COTTER PIN CABLE KEEPER INSTEAD OFMay 21, 1998 · Cessna 172R · Aileron Control SystemSDR AU980550Control Cable · misinstalled(AUS) AILERON CABLE IN RT WING IS ROUTED OVER THE AUTOPILOT SERVO PULLEY AND OVER THE AILERON CABLE PULLEY RESULTING IN THE CABLE BEING PULLED OUT OF ALIGNMENT CAUSING A LARGE CABLE DEFLECTION THAT HAS THE CABLE RIDING ON THE COTTER PIN CABLE KEEPER INSTEAD OFMay 21, 1998 · Cessna 172R · Aileron Control SystemSDR 98ZZZX2274Float · misinstalledTROUBLESHOT ERRATIC RIGHT FUEL QUANTITY GAUGE TO DEFECTIVE FLOAT IN RIGHT TANK. UPON REMOVAL OF FLOAT, FOUND PART NUMBER OF LEFT FLOAT. INSPECTED LEFT FLOAT AND FOUND PART NUMBER OF RIGHT FLOAT. FUEL FLOATS HAD BEEN INSTALLED IN REVERSE POSITIONS FROM FACTOMay 19, 1998 · N375ES · Cessna 172R · Fuel Quantity SensorSDR 98ZZZX1712Seat · misdrilledTHE BACK SEAT APPEARS TO HAVE BEEN JIGGED IMPROPERLY DURING MANUFACTURING. THE BRACKETS THAT ATTACH SEAT TO THE FLOOR AND THE ATTACHMENT HOLES IN THE SEAT DO NOT LINE UP. IT IS POSSIBLE TO LINE UP BACK 2 BRACKETS, BUT FRONT 3 BRACKETS ARE UP TO ONE-HALF THE Apr 23, 1998 · N255HP · Cessna 172R · Passenger Compartment EquipmentSDR 98ZZZX1471Rocker Shaft · looseA DEAD CYLINDER CAUSED AIRCRAFT TO LAND. TROUBLESHOOTING FOUND NR 3 CYLINDER DEAD. WHEN REMOVING THE VALVE COVER, FOUND THE INTAKE AND EXHAUST ROCKER SHAFTS LOOSE AND ONE RETAINING NUT WAS INSIDE THE VALVE COVER. THE ACFT HAD JUST BEEN RETURNED TO SERVICE 2 Apr 8, 1998 · Cessna 172R · Reciprocating Engine Cylinder SectionSDR 98ZZZX1344O-Ring · incorrectINCORRECT O-RING INSTALLED AT FACTORY. SUBMITTER STATED THERE WAS A POSSIBILITY O-RING SWELLED CAUSING LOSS OF BRAKE PRESSURE.Mar 18, 1998 · N97100 · Cessna 172R · BrakeSDR 98ZZZX974Rivets · failedDURING 100-HOUR INSPECTION, FOUND 4 OF THE AN426 RIVETS SECURING THE UPPER HORIZONTAL STABILIZER SKIN PULLED COMPLETELY THROUGH ON THE LEFT SIDE. ALL OF THE REMAINING RIVETS BOTH LEFT AND RIGHT SIDE SHOWED SIGNS OF WORKING THESE RIVETS ARE INBOARD UNDER THE SFeb 20, 1998 · N365ES · Cessna 172R · Horizontal Stabilizer, Plate/SkinSDR 98ZZZX973Firewall · crackedDURING 100-HOUR INSPECTION, FOUND FIREWALL CRACKED AT THE LOWER LEFT COWL SHOCK MOUNT BELOW THE BATTERY BOX. VISIBLE PORTION OF CRACK WAS APPROXIMATELY .50 INCH LONG. AFTER CLOSER EXAMINATION FROM INSIDE THE CABIN, THE CRACK APPEARED TO BE ABOUT 3 INCHES LONFeb 20, 1998 · N365ES · Cessna 172R · Nacelle/Pylon, Bulkhead/FirewallSDR 98ZZZX1477Autopilot Sys · malfunctionedDURING FLIGHT, AUTOPILOT (WHICH WAS OFF) TURNED ITSELF ON AND COULD NOT BE TURNED OFF WITH THE ON/OFF BUTTON. THE INDICATOR LIGHTS BEGAN TO FLASH RANDOMLY. AFTER SEVERAL MINUTES, THE UNIT SHUT ITSELF OFF. ACFT LANDED WITHOUT INCIDENT. THE AUTOPILOT BOX WASFeb 19, 1998 · N118ET · Cessna 172R · Autopilot SystemSDR 98ZZZX933Spinner · chafedINTERFERENCE BETWEEN PROPELLER AND PROPELLER SPINNER CAUSING CHAFING ON PROPELLER.Feb 2, 1998 · N9897F · Cessna 172R · Propeller Spinner Section
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