# Service difficulty reports: N478X A list on [N478X](https://openairdocs.org/aircraft/N478X.md). Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first. Page 1 of 2 · 52 reports - [SDR HEEA098568](https://openairdocs.org/sdr/HEEA098568.md): Transmitter · fluctuates · Nov 30, 2004 · N478X · Skrsky S76C · Rotor Drive Indicating System > DURING CLIMB-OUT, MAIN GEARBOX PRESSURE FLUCTUATED FROM GREEN TO YELLOW RANGE THEN DROPPED TO ZERO. MAINTENANCE CLEANED THE CANNON PLUG CONNECTING TO THE TRANSMISSION OIL PRESSURE TRANSMITTER. - [SDR HEED089063](https://openairdocs.org/sdr/HEED089063.md): Spar · cracked · Sep 5, 2003 · N478X · Skrsky S76C · Rotorcraft Tail Boom > CRACKED IN TAIL PYLON AFT SPAR WEB. RUN FROM LT SPAR TO RT SPAR. - [SDR HEED089126](https://openairdocs.org/sdr/HEED089126.md): Actuator · stuck · Mar 11, 2002 · N478X · Skrsky S76C · Stabilizer Actuator > LINEAR ACTUATOR STICKING. REPLACED UNIT. - [SDR HEED089125](https://openairdocs.org/sdr/HEED089125.md): Ahrs · inoperative · Mar 8, 2002 · N478X · Skrsky S76C · Autopilot System > AHRS INOPERATIVE. OFF AND ON. REPLACED UNIT. - [SDR HEED089124](https://openairdocs.org/sdr/HEED089124.md): Transducer · malfunctioned · Feb 19, 2002 · N478X · Skrsky S76C · Main Rotor Head > TRANSDUCER AFFECTS PBA. REPLACED UNIT. - [SDR HEED089122](https://openairdocs.org/sdr/HEED089122.md): Ahrs · intermittent · Jan 16, 2002 · N478X · Skrsky S76C · Attitude and Direction Data System > AHRS INTERMITTANTLY INOPERATIVE, WILL NOT STAY ON LINE. REPLACED UNIT. - [SDR HEED073508](https://openairdocs.org/sdr/HEED073508.md): Actuator · intermittent · Jun 14, 2001 · N478X · Skrsky S76C · Autopilot System > KICKING INTERMITTLY. REPLACED UNIT. - [SDR HEED073507](https://openairdocs.org/sdr/HEED073507.md): Cvr · will not test · Jun 14, 2001 · N478X · Skrsky S76C · Audio/Video Monitoring > FDR WILL NOT TEST. REPLACED UNIT. - [SDR HEED073506](https://openairdocs.org/sdr/HEED073506.md): Control Unit · failed · Jun 14, 2001 · N478X · Skrsky S76C · Engine (Turbine/Turboprop) > NR 1 ENGINE RUN UP FAULT. REPLACED UNIT. - [SDR HEED073505](https://openairdocs.org/sdr/HEED073505.md): Actuator · chattering · Jun 14, 2001 · N478X · Skrsky S76C · Autopilot System > CHATTERING. REPLACED UNIT. - [SDR HEED073494](https://openairdocs.org/sdr/HEED073494.md): Battery · discharged · Jun 14, 2001 · N478X · Skrsky S76C · Battery/Charger System > WOULD CRANK AIRCRAFT ENGINES TO START BATTERY DEAD. VERY WEAK ON FIRST START OFTHE DAY. REPLACED UNIT. - [SDR HEED073493](https://openairdocs.org/sdr/HEED073493.md): Indicator · failed · Jun 14, 2001 · N478X · Skrsky S76C · Engine RPM Indicating System > PIECES OF LED SECTIONS MISSING IN NUMBER DISPLAY. BURNED OUT. REPLACED UNIT. - [SDR HEED073492](https://openairdocs.org/sdr/HEED073492.md): Light · burned out · Jun 14, 2001 · N478X · Skrsky S76C · Exterior Lighting > FLASH TUBE BURNED OUT. SCRAPPED REPLACED UNIT. - [SDR HEED073491](https://openairdocs.org/sdr/HEED073491.md): Ics Box · intermittent · Jun 14, 2001 · N478X · Skrsky S76C · Audio Integrating System > INTERMITTENTLY TRANSMISSION ON ALL CHANNELS. REPLACED UNIT. - [SDR HEED072208](https://openairdocs.org/sdr/HEED072208.md): Module · malfunctioned · Mar 14, 2001 · N478X · Skrsky S76C · Hydraulic System, Main > HYD MODULE CAUSES INTERMITT 32 SYSTEM SERVO LITE. REPLACED UNIT. - [SDR HEED072206](https://openairdocs.org/sdr/HEED072206.md): Mixer Box · intermittent · Mar 14, 2001 · N478X · Skrsky S76C · Communications System > INTERMITTLY INOPERATIVE COMPLETELY IN ALL SWITCH POSITIONS. REPLACED UNIT. - [SDR HEED072205](https://openairdocs.org/sdr/HEED072205.md): Mixer Box · intermittent · Mar 14, 2001 · N478X · Skrsky S76C · Communications System > BOX CUTS OUT IN ICS. REPLACED UNIT. - [SDR HEED065837](https://openairdocs.org/sdr/HEED065837.md): Tachometer · failed · Jan 24, 2000 · N478X · Skrsky S76C · Engine RPM Indicating System > N1 GAUGE DIGITAL LIGHTS CANNOT BE READ WHEN NON- FLIGHT INST. LIGHT SWITCH IS ON. REPLACED UNIT. - [SDR HEED065836](https://openairdocs.org/sdr/HEED065836.md): Tachometer · failed · Jan 24, 2000 · N478X · Skrsky S76C · Engine RPM Indicating System > TURN ON ANALOG LIGHTS, DIGITAL GOES OFF. REPLACED UNIT. - [SDR HEED065830](https://openairdocs.org/sdr/HEED065830.md): Turbine · rubbing · Jan 24, 2000 · N478X · Skrsky S76C · Turbine Section > TURBINE RUB. REPLACED UNIT. - [SDR HEED065825](https://openairdocs.org/sdr/HEED065825.md): Servo · leaking · Dec 22, 1999 · N478X · Skrsky S76C · Rotorcraft Servo System > SERVO LEAKING. REPLACED UNIT. - [SDR HEED065824](https://openairdocs.org/sdr/HEED065824.md): Lining · worn · Dec 22, 1999 · N478X · Skrsky S76C · Landing Gear Brake System > WORN BRAKE LINNING. REPLACED UNIT. - [SDR HEED065813](https://openairdocs.org/sdr/HEED065813.md): Actuator · inoperative · Dec 21, 1999 · N478X · Skrsky S76C · Autopilot Main Servo > ACTUATOR INOPERATIVE. REPLACED UNIT. - [SDR HEED065797](https://openairdocs.org/sdr/HEED065797.md): Wheel · worn · Dec 17, 1999 · N478X · Skrsky S76C · Wheel/Ski/Float > WHEEL WORN. REPLACED UNIT. - [SDR HEED065794](https://openairdocs.org/sdr/HEED065794.md): Panel · cracked · Dec 17, 1999 · N478X · Skrsky S76C · Passenger/Crew Doors > COVER PANEL FOR RIGHT HAND PASSENGER'S DOOR VENT CONTROL CRACKS AND MOUNT HOLES AND CORNER BROKEN OFF. REPLACED UNIT. - [SDR HEED065779](https://openairdocs.org/sdr/HEED065779.md): Indicator · failed · Dec 17, 1999 · N478X · Skrsky S76C · Engine RPM Indicating System > DIGITAL LIGHTS. REPLACED UNIT. - [SDR HEED065775](https://openairdocs.org/sdr/HEED065775.md): Actuator · kicking · Dec 17, 1999 · N478X · Skrsky S76C · Autopilot Main Servo > ACTUATOR KICKS. REPLACED UNIT. - [SDR HEED065774](https://openairdocs.org/sdr/HEED065774.md): Actuator · kicking · Dec 17, 1999 · N478X · Skrsky S76C · Autopilot Main Servo > ACTUATOR KICKS. REPLACED UNIT. - [SDR HEED065746](https://openairdocs.org/sdr/HEED065746.md): Encoder · malfunctioned · Dec 16, 1999 · N478X · Skrsky S76C · Altimeter, Barometric/Encoder > ENCODING ALT. SENDS 020 ERROR CODE TO SKYWATCH IND DURING FLIGHT INTERMITTENTLY. SKY WATCH SYSTEM CYCLES OFF AND ON, 020 ERROR IS BAROMETRIC ALTITUDE INPUT. REPLACED UNIT. - [SDR HEED065698](https://openairdocs.org/sdr/HEED065698.md): Indicator · malfunctioned · Dec 14, 1999 · N478X · Skrsky S76C · Engine Fuel Indicating System > NR 2 NEEDLE WENT TO ZERO ON FUEL QUANTITY CONTROL. - [SDR HEED064628](https://openairdocs.org/sdr/HEED064628.md): Indicator · sticking · Nov 8, 1999 · N478X · Skrsky S76C · Main Rotor Indicating System > NR 1 AND NR 2 NEEDLES STICK AT 20 PERCENT ON TRIPLE TACHOMETER. REPLACED PART. - [SDR HEED064627](https://openairdocs.org/sdr/HEED064627.md): Indicator · fluctuating · Nov 8, 1999 · N478X · Skrsky S76C · Engine RPM Indicating System > N1 INDICATOR AFTER APPROXIMATELY 1 TO 1-1/2 HOURS OF OPERATION, INDICATOR NEEDLE STARTED FLUCTUATING FROM OPERATING RANGE TO ZERO AND BACK AGAIN. ALL TESTS AND WARNING LIGHTS WOULD BLINK OFF AND ON AND DIGITS WOULD READ 8888. SUBMITTER STATED THE CONNECTOR W - [SDR HEED064626](https://openairdocs.org/sdr/HEED064626.md): Indicator · malfunctioned · Nov 8, 1999 · N478X · Skrsky S76C · Engine RPM Indicating System > THE DIGITAL NUMBERS THAT WERE LIT UP, WERE BRIGHTER THAN THE OTHER N1 INDICATOR, IT WOULD PULL THE BRIGTHNESS OF ANY OTHER INDICATOR IT WAS PAIRED WITH DOWN TO ALMOST NO INDICATION, WHEN LIGHT CONTROL SET TO MINIMUM AND WHEN SET AT MAXIMUM, IT WAS ALWAYS BRIGH - [SDR HEED064625](https://openairdocs.org/sdr/HEED064625.md): Clock · slow · Nov 8, 1999 · N478X · Skrsky S76C · Independent Instruments > CLOCK LOOSES 10 MINUTES EVERY DAY. REPLACED PART. - [SDR HEED064624](https://openairdocs.org/sdr/HEED064624.md): Servo · intermittent · Nov 8, 1999 · N478X · Skrsky S76C · Autopilot System > PITCH BIAS ACTUATOR, PBA, IMTERMITTENTLY CAUSES AIRCRAFT TO PITCH UP OR DOWN DURING CRUISE FLIGHT. REPLACED PART. - [SDR HEED064623](https://openairdocs.org/sdr/HEED064623.md): Indicator · failed · Nov 8, 1999 · N478X · Skrsky S76C · Engine RPM Indicating System > N1 INDICATOR NEEDLE STOPS MOVING IN-FLIGHT. CAN GET IT BACK IN OPERATIONAL BY DISCONNECTING ALL POWER THEN RECONNECTING POWER, BUT INDICATOR CONTINUES TO MALFUNCTION, REPLACED PART. - [SDR HEED064622](https://openairdocs.org/sdr/HEED064622.md): Screen · broken · Nov 8, 1999 · N478X · Skrsky S76C · Turbine Engine Air Inlet Section > INTAKE SCREEN HAD BROKEN WIRE. REPLACED PART. - [SDR HEED064621](https://openairdocs.org/sdr/HEED064621.md): Amplifier · erratic · Nov 8, 1999 · N478X · Skrsky S76C · Autopilot System > PILOT REPORTED ERRATIC PITCH BIAS ACTUATOR MOVEMENT. REPLACED PART. - [SDR HEED064620](https://openairdocs.org/sdr/HEED064620.md): Altimeter · malfunctioned · Nov 8, 1999 · N478X · Skrsky S76C · Altimeter, Barometric/Encoder > INDICATOR OFF FLAG WILL NOT PULL WHEN INDICATOR POWERED UP, BUT INDICATOR WORKED OTHERWISE. REPLACED PART. - [SDR HEED064619](https://openairdocs.org/sdr/HEED064619.md): Indicator · malfunctioned · Nov 8, 1999 · N478X · Skrsky S76C · Main Rotor Indicating System > INSTALLED IN AIRCRAFT ROTOR NEEDLE ADVANCED ABOVE NR 1, 32 ENGINE NEEDLES, ENGINE NEEDLES WOULD NOT MARRY WITH ROTOR NEEDLE, ROTOR NEEDLE 107 PERCENT, NR 1 ENGINE 70 PERCENT. THROTTLES IN FLY POSITION. SPLIT STAYED THE SAME START TO SHUT DOWN. REPLACED PAR - [SDR HEED064587](https://openairdocs.org/sdr/HEED064587.md): Blade · eroded · Sep 22, 1999 · N478X · Skrsky S76C · Tail Rotor Blades > EROSION OF PROTECTIVE RUBBER COATING ON LEADING EDGES OF TAIL ROTOR BLADE. REPLACED BLADE. - [SDR HEED064586](https://openairdocs.org/sdr/HEED064586.md): Blade · eroded · Sep 22, 1999 · N478X · Skrsky S76C · Tail Rotor Blades > EROSION OF PROTECTIVE RUBBER COATING ON LEADING EDGES OF TAIL ROTOR BLADE. REPLACED BLADE. - [SDR HEED064579](https://openairdocs.org/sdr/HEED064579.md): Housing · corroded · Jun 25, 1999 · N478X · Skrsky S76C · Tail Rotor Gearbox > TAIL ROTOR GEARBOX S/N: A239-00202 REMOVED FROM AIRCRAFT DUE TO LEAKING. FOUND OUTPUT HOUSING (ABOVE) QUADRANT ATTACHMENT BOLT HOLE AREA CORRODED. REPLACED WITH NEW OUTPUT HOUSING. - [SDR HEED064578](https://openairdocs.org/sdr/HEED064578.md): Power Supply · inoperative · Jun 25, 1999 · N478X · Skrsky S76C · Electrical Power System > POWER SUPPLY INOPERATIVE. ORDERED REPLACEMENT. - [SDR HEED064577](https://openairdocs.org/sdr/HEED064577.md): Indicator · malfunctioned · Jun 25, 1999 · N478X · Skrsky S76C · Engine RPM Indicating System > N1 INDICATOR WENT TO ERR 2. ORDERED REPLACEMENT. - [SDR HEED064558](https://openairdocs.org/sdr/HEED064558.md): Indicator · failed · Jun 16, 1999 · N478X · Skrsky S76C · Engine RPM Indicating System > N1 INDICATOR WILL NOT SELF-TEST WITHOUT RESETTING 3 OR 4 TIMES. ORDERED REPLACEMENT. - [SDR HEED064557](https://openairdocs.org/sdr/HEED064557.md): Indicator · intermittent · Jun 16, 1999 · N478X · Skrsky S76C · Engine RPM Indicating System > GAUGE INDICATED ERR 3 INTERMITTENTLY. ORDERED REPLACEMENT. - [SDR HEED064556](https://openairdocs.org/sdr/HEED064556.md): Indicator · failed · Jun 16, 1999 · N478X · Skrsky S76C · Engine RPM Indicating System > N1 INDICATOR FAILED OFFSHORE. ORDERED REPLACEMENT. - [SDR HEED064555](https://openairdocs.org/sdr/HEED064555.md): Indicator · malfunctioned · Jun 16, 1999 · N478X · Skrsky S76C · Engine RPM Indicating System > GAUGE GOES TO ZERO IN-FLIGHT, HAPPENED TWICE ON 1-1/2 HOUR FLIGHT. ORDERED REPLACEMENT. - [SDR HEED064554](https://openairdocs.org/sdr/HEED064554.md): Indicator · malfunctioned · Jun 16, 1999 · N478X · Skrsky S76C · Engine RPM Indicating System > N1 INDICATOR'S LED LIGHTS WILL NOT DIM. ORDERED REPLACEMENT. Next page: https://openairdocs.org/aircraft/N478X/reports.md?page=2 ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql 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 n_number = 'N478X' AND registry_match = 'registration' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/aircraft/N478X/reports --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.