N21498
Operators of this aircraft
Who operated this tail, and how firmly we know it.
No operator established for this aircraft.
Accident & incident history
No NTSB accidents or incidents on file for this aircraft.
Maintenance disclosures
DURING CRUISE CHECK, THE HYDRAULIC PRESSURE ON THE NR 1 SIDE FELL TO 0. FUEL PRESSURE AND OIL PRESSURE ON NR 2 SIDE PEGGED OUT. RETURNED TO DEPARTURE.
DURING FLIGHT THERE WAS A BURNING ODOR IN COCKPIT AND CIRCUIT BREAKER POPPED. MAINTENANCE FOUND THE INSTRUMENT LIGHTS POWER SUPPLY HAD BURNED. REPLACED BURNED INSTRUMENT LIGHTS POWER SUPPLY.
STARTER GEN MAKING NOISE.
FUEL CELL LEAKING.
FUEL CELL LEAKING.
EXCITER CORRODED. TO BE SENT TO VENDOR.
GAS CYLINDER WEAK. SCRAPPED.
ALTIMETER INDICATOR READS 100 FT OFF. REPAIRED.
DURING FLIGHT HAD NR 1 ENGINE LOW SIDE GOVERNOR FAILURE. MAINTENANCE LEAK CHECKED ALL LINES AND REPLACED GOVERNOR. ALSO CHECKED LINES FOR CONTAMINATION.
ON LIFT OFF, NR 1 ENGINE GOVERNOR HAD A LOW SIDE FAILURE. REPLACED GOVERNOR.
LOW SIDE FAILURE. SHOP REPAIR.
MLG CAP HAS WORN RUBBER. SHOP REPAIR.
ATTITUDE INDICATOR GLIDE SLOPE FLAG WILL NOT PULL.
ATTITUDE INDICATOR PRECESSING.
MAIN ROTOR BLADE HAS A HOLE NEAR MID SPAN TAB. SHOP REPAIR.
BLUE TRAILING EDGE WORN. SHOP REPAIR.
NUT PLATE BROKEN. SCRAPPED.
MAIN ROTOR QUILL ASSY SEAL LEAKS. IN REPAIR.
TAIL ROTOR WORN BUSHINGS. REPAIRED.
MAIN ROTOR ROD BEARING HAS WEAR.
MAIN ROTOR MAST LINK HAS BEARING WEAR. SHOP REPAIR.
MAIN ROTOR LINK HAS BEARING WEAR. REPAIRED.
MAIN ROTOR LINK HAS BEARING WEAR. REPAIRED.
MAIN ROTOR GEARBOX HAS BEARING WEAR. SCRAPPED.
MAIN ROTOR GEARBOX HAS BEARING WEAR. SCRAPPED.
MAIN ROTOR GEARBOX HAS BEARING WEAR. SCRAPPED.
MAIN ROTOR GEARBOX HAS BEARING WEAR. SCRAPPED.
STEP ACTUATION ONLY COMES UP HALF WAY. SENT ACTUATOR TO VENDOR FOR REPAIR.
ENGINE MOUNT HAS A WORN BEARING. REPLACED WITH SERVICEABLE PART.
ENGINE MOUNT HAS A WORN BEARING. REPLACED WITH SERVICEABLE PART.
ENGINE CONTROLS HAVE WORN BEARING. SCRAPPED.
LIGHT FLICKERS ON INTERMITTENTLY. SCRAPPED SWITCH.
VERTICAL PYLON COVER DID NOT FIT PROPERLY. IN REPAIR.
CARGO DOOR HAS SEPERATION IN UPPER AFT CORNER OF PANEL. IN REPAIR.
SMOKE DETECTOR WILL NOT TEST WITH SMOKE.
MAIN ROTOR PENDULUM ASSY BEARING HAS ROUGHNESS. REPAIRED.
FUEL QUANTITY INDICATOR FLUCTUATES.
PRECESS TO RIGHT AFTER ONE HOUR OF FLIGHT. REPAIRED.
TAIL ROTOR HEAD HAS WORN BEARINGS. REPAIRED.
TAIL ROTOR HEAD HAS WORN FEATHERING BEARINGS. REPAIRED.
WEATHER RADAR RT/ANT RADAR INOPERATIVE.
TAIL ROTOR SERVO LEAKING IN STATIC POSITION. REPAIRED.
MAIN ROTOR BLADE LOWER EROSION SHIELD PEELING OFF BEYOND LIMITS.
EROSION SHIELD ON MAIN ROTOR BLADE IS TORN ON THE LOWER SIDE AT THE OUTBOARD END.
MAIN FRAME CAP CRACKED IN RADIUS AT STATION 166, WL 11.587. REPLACED WITH SERVICEABLE PART.
WENT DEAD. PERFORMED PRELIMINARY INSPECTION. FOUND CR106 DIODE BURNT AND C111 CAPACITOR SHORTED. ALSO FOUND C115 CAPACITOR BAD. REPLACED CR106 DIOD AND C111 AND C115 CAPACITORS. ADJUSTED MTL. UNIT BENCH CHECK GOOD.
ALTIMETER FLUCTUATES INTERMITTENTLY.
COPILOT'S TRIPLE TACHOMETER READS 5 PERCENT HIGHER THAN PILOT'S ON ROTOR NEEDLE. S
TRIPLE TACHOMETER INDICATOR'S NR 2 NEEDLE STUCK.
READING 2 PERCENT LOWER THAN PILOT'S TACHOMETER.
ALTIMETER INDICATOR FLUCTUATES INTERMITTENTLY.
INDICATOR RATCHETS 7-8 DEGREES IN A TURN.
ATTITUDE INDICATOR RATCHETY.
CONTROL UNIT NOPERATIVE.
ATTITUDE INDICATOR PRECESSES AND HORIZONTAL CONTROL KNOB CAUSES BALL TO REACT IN A SKIPPING MOTION.
ROTARY ACTUATOR WILL NOT DISENGAGE.
FUEL LIGHT INTERMITTENT.
FUEL LIGHT INTERMITTENT.
OUTBOARD LEADING EDGE STRIP ON BLADE HAD PIN HOLES THROUGH AND EROSION SHIELD TORN AT THE TIP END.
PITCH IS INOPERATIVE. TIME SINCE REPAIR 37:20 HOURS.
NR 2 HELIPILOT WOULD NOT ENGAGE. CAUSES SAS AND ATT LIGHTS TO STAY ILLUMINATED.
GAUGE FLUCTUATES RAPIDLY DURING FLIGHT.
ALL NEEDLES FLUCTUATE AND INTERMITTENTLY DROP OFF-LINE.
WHEN AFCS COMPUTER INSTALLED, CAUSED YAW CHANNEL TO OSCILLATE, YAW CHANNEL TOO SENSITIVE.
DURING BASE LEG, PILOT INSTRUMENT LIGHTS WENT OUT. WHEN CIRCUIT BREAKER WAS RESET, SPARKS WERE OBSERVED AT THE LOWER INSIDE CORNER OF THE PILOTS WINDSHIELD NEAR CENTER POST. FOUND INSTRUMENT LIGHT WIRE CHAFED AGAINST THE FUEL QUANTITY INDICATION CANNON PLUG. REF: 412 IPC, FIGURE 96-6-63.
PILOTS RMI WILL NOT SLAVE TO MAG COMPASS.
AIRSPEED INDICATION INDICATES LOW OUT OF TOLERANCE THROUGHOUT.
AIRSPEED NEEDLE READS HIGH OUT OF TOLERANCE.
NO POWER OUTPUT ON PITCH MODE.
UNRELIABLE ANALOG INDICATION READS 250 POUNDS ON RIGHT SIDE LESS THAN LEFT SIDE ON FUEL QUANTITY INDICATOR.
ALTIMETER INDICATION NEEDLES STICK THROUGHOUT RANGE.
NR 2 HELIPILOT KICKS OFF 14 FIT = SAS ATT MODE LIGHTS REMAIN ON AT SAME TIME.
VHF NAV RECEIVER READS 177 OFF, NOT FOLLOWING COMPASS.
TRANSPONDER LOSES CODE MEMORY WHEN TURNED OFF.
PUMP INOPERATIVE, WAS VERY NOISY BEFORE IT QUIT.
RADAR ALTIMETER WOULD NOT TEST ON GROUND.
SHOWS 120 POUNDS FUEL WHEN TANK EMPTY.
ACTUATOR WILL NOT ACTUATE.
STEP ACTUATOR STUCK.
STEP ACTUATOR ACTUATES SLOWLY.
ROTOR READS HIGH IN ALL RPM'S.
VOLUME HAS STATIC WHEN MOVED, ADF COMES ON BY ITSELF. BLEED OVER BETWEEN RADIOS AND FACEPLATE UNACCEPTABLE FOR NIGHTS.
POWER SUPPLY HAS NO OUTPUT.
GLIDESCOPE INOPERATIVE.
STEP ACTUATOR BURNED OUT OR WORN.
BATTERY VOLTAGE BELOW 18 VOLTS.
GYRO INDICATOR LIGHTS DO NOT WORK, ALSO IND. PRECESSES TO THE RIGHT. REPLACED ALL BEARINGS AND CALIBRATED UNIT. REPAIRED 5 VOLTS LIGHTS. BENCH CHECK GOOD.
ENGINE RUNNING HOT HIGH ITT.
EJECTOR ASSEMBLY CRACKED AND BRACKET BROKEN.
WHEN INSTALLED IN AIRCRAFT BLEED VALVE CAUSED COMPRESSOR STALL. REPLACED WITH SERVICEABLE BLEED VALVE.
BENCH CHECK AND 2 YEAR INSPECTION. PERFORMED PRELIMINARY INSPECTION. FOUND TRANSMIT POWER OUT FLUCTUATING AND MODULATION DISTORTED INTERMITTENTLY. SWAPPED OUT Q109 AND Q110 TRANSISTORS. NO HELP. ALSO FOUND C529 CAPACITOR BROKEN.
COMBINING BOX IS TRANSFERRING OIL TO NR 1 ENGINE.
CONTROL UNIT HAS NO OUTPUT.
STROBE LIGHT INOPERATIVE AFTER 3 MINUTES.
ENGINE INTAKE UNIT INOPERATIVE. TAPPING ON UNIT FREED THE MOTOR FOR A SHORT TIME.
READINGS ARE OFF 20 DEGREES OFF. ADJUSTMENTS DO NOT HELP.
REMOVED WITH CVR S/N 379 DUE TO WON'T TEST.
HSI CDI NEEDLE DEFLECTS FULL SCALE WHILE ON COURSE.
CVR WON'T TEST.
VALVE WILL NOT CLOSE IN NORMAL POSITION.
WILL NOT COME ON LINE. CONTROL UNIT FAILED
TACH GENERATOR INOPERATIVE.
OIL LEAKING FROM COMPRESSOR AREA AND FORWARD COMBUSTION DRAIN.
AIRCRAFT DIFFICULT TO START. IGNITER BOX FAILED
TRIPLE TACH INDICATOR ALL NEEDLES ARE ERRATIC.
VOR INOPERATIVE.
COMM CONTROL DISPLAY SOMETIMES UNREADABLE. PERFORMED PRELIMINARY INSPECTION. REPLACED DISPLAY LENS. REPAIRED. ALSO REPLACED PHOTOCELL LENS AND HEADER P201. CHECKED 28V LIGHTING. BENCH CHECK GOOD.
SERVO CONTROLLER INOPERATIVE.
ALTIMETER STICKS AT 500 FEET THEN JUMPS 300 FEET. DOES SAME AT 1500 FEET.
EJECTOR ASSY MOUNT BRACKETS BROKEN.
BLADE SKIN LIFTED AT END CAP AND VOID ON END CAP.
TEMP CONTROL MOTOR RUNNING BUT DRIVE SHAFT NOT TURNING.
SLEEVE ASSY HAS CORROSION ON FLANGE AREA.
CROSS-TUBE CAP WORN AND DETERIORATED.
CROSS-TUBE RUBBER DETERIORATED.
ALTIMETER NEEDLE FLUCTUATES 100 FEET UP AND DOWN PAST ACTUAL READING.
LT SKID TUBE CORRODED BEYOND LIMITS.
CAP ASSY FWD RUBBER WORN.
ROTARY ACTUATOR STICKING.
ALTIMETER INDICATES 1000 FEET AT SEA LEVEL AND BELOW.
BATTERY HOT LIGHT ILLUMINATED.
COMPASS MISSING COVERPLATE SCREWS.
AIR SPEED INDICATING LOW.
YAW CHANNEL KICKS IN ALL MODES.
ACTUATOR INOPERATIVE WILL NOT MOTOR UP OR DOWN. SERIAL NUMBERS REMOVED ARE 1491, 1738, AND 640.
ATTITUDE GYRO WILL NOT REMAIN ERECT.
RUBBER TORN.
ALTIMETER LIGHT INOPERATIVE. TIME SINCE REPAIR 31:40.
ALTIMETER INCONSISTENT READINGS CANNOT CALIBRATE AND ENCODER OFF 200 FEET.
ALTIMETER INCONSISTENT INDICATION ON LOW END AFTER SEALS ERROR CHECK TO 20,000 FEET.
INTERMITTENTLY DISCONNECTS IN BOTH SAS AND ATT.
BOOST PUMP WILL NOT WORK AND POPS CIRCUIT BREAKERS.
DAMPER SEPARATED, SHIMS EXPOSED (RUBBER SEPARATION)
UNABLE TO TRACK BLADE.
UNABLE TO TRACK BLADE.
PUMP INOPERATIVE.
CONTROL BOX DISPLAY STAYS DIM. PERFORMED PRELIMINARY INSPECTION. REPLACED V301 PHOTOCELL, TRANSFER SWITCH S301. REPAIRED. ALSO REPLACED CONNECTOR J5861. TOUCHED UP FACEPLATE. BENCH CHECK GOOD.
RT DUCT ASSY EXCESSIVE CRACKING.
SCRIBE MARKS IN AREA OF CROSSTUBE NOT PERMITTED AS PER BHT412-CR&O.
RECEIVER INTERMITTENT. PERFORMED PRELIMINARY INSPECTION. FOUND EXCESSIVE CORROSION ON CONN. J8061, REPLACED CONN. J8061. ONE EACH SPACER AND ONE EACH PLATE. ALSO REPLACED MISSING SCREW. REPAIRED, TESTED, ADJUSTED POT. R374 AND CLEANED HEADERS. BENCH CHECK GOOD.
SLEEVE ASSY IS CORRODED. (FOUND EXCESSIVE CORROSION SLEEVE IN AREA "A") REPLACED WITH SERVICEABLE PART.
CORROSION ON LUG OF IDLER CLEVIS ALL AROUND BOLT HOLE ON O.D. OF CLEVIS. REPLACED WITH SERVICEABLE PART.
CVR WILL NOT WORK.
INDICATOR STICKS ON PRESSURE AT 45 PSI.
DIGITS WEAK AND HARD TO TUNE. FOUND PHOTOCELL BAD. REPLACED PHOTOCELL V101 AND LENS COVER. BENCH CHECK GOOD.
ENCODER HAS ERRATIC OUTPUT. SENT TO B.F. GOODRICH AEROSPACE FOR WARRANTY REPAIR. TIME SINCE REPAIR0:00.
BATTERY UNIT WILL NOT PASS CAPACITY TEST.
CVR PINGER MOUNT NUT PLATES MISSING.
READS LOWER THAN ACTUAL ALTITUDE AND ERRATIC. FOUND PRECISION EQUIPMENT VOLTAGE TO EITHER DOUBLE OR HALF WHEN AMPLITUDE IS CHANGED. FOUND PROBLEM TO BE ON CAL/LOOP BOARD. REPLACED INTEGRATED CIRCUITS I501,I502,I503,I504,I505,I507,I508, TRANSISTORS Q501 THROUGH Q512; DIODES CR503,CR521,CR508;CAPACITORS C506 AND C520. REPLACED CAL/LOOP BOARD. REPAIRED. REPLACED RESISTORS R518,R519,R534 AND R260 TO INCORPORATE MOD 10 AS PER KING SERVICE BULLETIN KRA-405-10. BENCH CHECK GOOD.
BENCH CHECK REQUIRED. FOUND PH LIGHT DOES NOT DIM. REPLACED PHOTOCELL V101. REPAIRED. PERFORMED COMPLETE CALIBRATION AND ALIGNMENT. BENCH CHECK GOOD.
IN FLIGHT 200 FEET NEEDLE FLUCTUATES. INSTALLED MOD 10 AS PER SERVICE BULLETIN KING KRA-405-10. PERFORMED COMPLETE CALIBRATION AND ALIGNMENT. BENCH CHECK GOOD.
DISPLAY DIM IN BRIGHT LIGHT. REPLACED PHOTOCELLV101. REPAIRED. REPLACED INTERMITTENT "IDT" SWITCH S103. BENCH CHECK GOOD.
INDICATOR #2 NEEDLE HAS NO INDICATION.
CVR WILL NOT TEST.
AUDIO ERRATIC.
RPM LIGHT AND AUDIO COMES ON INTERMITTENTLY.
FUNCTION SWITCH HAS NO STOPS. REPLACED BROKEN SWITCH CONTACT ASSY DUE TO STOPS BROKEN OFF. ALSO REPLACED DEFECTIVE TRANSFER SWITCH S103 AND I306 INTERGRATED CIRCUIT DUE TO STB AND ALT WOULD NOT LIGHT ON DISPLAY. REPAIRED.
REMOVED TO INSTALL NEW STYLE DAMPER SET P/N 412-010-145-105. S/N 2326 & 2311
AFTER TAKEOFF FROM HELIPORT, NR 1 ENGINE DROPPED OFF LINE. CONTINUED ON TO PHI. LANDED WITHOUT INCIDENT. INVESTIGATION FOUND GOVERNOR MALFUNCTION. P & W IPC, 72-10-30, PAGE 0, FIGURE 1, ITEM 20.
VOLTAGE WENT TO 120V THEN DROPPED OFF LINE.
LONGERON CORRODED DEEP AT STATION 101.38 SPLICE AS SEEN IN UPPER R/H AFT CORNER OF BAGGAGE COMPARTMENT, JUST OUTBOARD OF WHERE THE BAGGAGE COMPARTMENT CEILING PANEL ATTACHES TO LONGERON.
LONGERON HAS DEEP CORROSION AT STATION 101.38 SPLICE AS SEEN IN UPPER R/H AFT CORNER OF BAGGAGE COMPARTMENT, JUST OUTBOARD OF WHERE THE BAGGAGE COMPARTMENT CEILING PANEL ATTACHES TO LONGERON. REPLACED WITH SERVICEABLE LONGERON ASSY AND RETURNED TO SERVICE.
CARBIDE COATING FLAKING BEYOND LIMITS.