# Service difficulty reports: N724MB, cancelled Mar 12, 2001 A list on [N724MB, cancelled Mar 12, 2001](https://openairdocs.org/deregistered/N724MB-2001-03-12.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 · 54 reports - [SDR HEEA063458](https://openairdocs.org/sdr/HEEA063458.md): Turbine · seized · Aug 12, 1999 · N724MB · Bolkms BO105S · Cabin Cooling System > TURBINE SEIZED. - [SDR HEEA060452](https://openairdocs.org/sdr/HEEA060452.md): Starter · malfunctioned · Jan 25, 1999 · N724MB · Bolkms BO105S · Starter-Generator > STARTER/GENERATOR NOISY AND ARCING. - [SDR HEEA0016747](https://openairdocs.org/sdr/HEEA0016747.md): Transmitter · intermittent · Nov 6, 1998 · N724MB · Bolkms BO105S · Emergency Locator Beacon > ELT SELF-ACTIVATES INTERMITTENTLY. - [SDR HEEA0016722](https://openairdocs.org/sdr/HEEA0016722.md): Indicator · malfunctioned · Nov 6, 1998 · N724MB · Bolkms BO105S · Engine EGT/TIT Indicating System > INSTRUMENT INDICATION DROPS OFF TO ZERO. - [SDR HEEA0016695](https://openairdocs.org/sdr/HEEA0016695.md): Warning Box · failed · Nov 6, 1998 · N724MB · Bolkms BO105S · Main Rotor Indicating System > RPM WARNING CAUSES TRIM CIRCUIT BREAKER TO TRIP. - [SDR HEEA0016694](https://openairdocs.org/sdr/HEEA0016694.md): Warning Box · malfunctioned · Nov 5, 1998 · N724MB · Bolkms BO105S · Main Rotor Indicating System > RPM WARNING LIGHT COMING ON IN-FLIGHT. - [SDR HEEA0016693](https://openairdocs.org/sdr/HEEA0016693.md): Warning Box · malfunctioned · Nov 5, 1998 · N724MB · Bolkms BO105S · Main Rotor Indicating System > RPM WARNING, AUDIO LIGHT CAME ON IN-FLIGHT. - [SDR HEEA0016691](https://openairdocs.org/sdr/HEEA0016691.md): Warning Box · malfunctioned · Nov 5, 1998 · N724MB · Bolkms BO105S · Main Rotor Indicating System > RPM WARNING, LIGHT COMING ON AT 100 PERCENT. - [SDR HEEA0016690](https://openairdocs.org/sdr/HEEA0016690.md): Warning Box · malfunctioned · Nov 5, 1998 · N724MB · Bolkms BO105S · Main Rotor Indicating System > RPM WARNING CAUSES AUDIO AND RPM LIGHT TO COME ON. - [SDR HEEA0016688](https://openairdocs.org/sdr/HEEA0016688.md): Warning Box · malfunctioned · Nov 5, 1998 · N724MB · Bolkms BO105S · Main Rotor Indicating System > RPM WARNING, INTERMITTENT AUDIO AND LIGHT. - [SDR HEEA0016684](https://openairdocs.org/sdr/HEEA0016684.md): Warning Box · malfunctioned · Nov 5, 1998 · N724MB · Bolkms BO105S · Main Rotor Indicating System > RPM AND AUDIO DOES NOT COME ON WHEN 12 PERCENT N1 SPLIT. - [SDR HEEA0015051](https://openairdocs.org/sdr/HEEA0015051.md): Rotor Mast · corroded · Jun 30, 1998 · N724MB · Bolkms BO105S · Main Rotor Mast/Swashplate > CORROSION IN BORES BEYOND LIMITS. REPLACED MAST ASSY. - [SDR HEEA0015050](https://openairdocs.org/sdr/HEEA0015050.md): Sun Gear · spalled · Jun 30, 1998 · N724MB · Bolkms BO105S · Main Rotor Gearbox > TRANSMISSION CAME IN DUE TO METAL IN OIL. REPLACED SUN GEAR. - [SDR HEEA0014645](https://openairdocs.org/sdr/HEEA0014645.md): Torquemeter · inoperative · Jun 8, 1998 · N724MB · Bolkms BO105S · Engine BMEP/Torque Indicating > TORQUEMETER NR 2 NEEDLE STAYS AT ZERO WHILE RUNNING. - [SDR HEEA0014507](https://openairdocs.org/sdr/HEEA0014507.md): Torquemeter · sticks · Jun 4, 1998 · N724MB · Bolkms BO105S · Engine BMEP/Torque Indicating > TORQUEMETER NR 2 NEEDLE STICKING IN-FLIGHT. - [SDR HEEA0013312](https://openairdocs.org/sdr/HEEA0013312.md): Valve · failed · Mar 5, 1998 · N724MB · Bolkms BO105S · Engine Oil Shutoff Valve > VALVE WILL NOT OPEN. INOPERATIVE. - [SDR HEEA0012990](https://openairdocs.org/sdr/HEEA0012990.md): Nozzle · cracked · Feb 10, 1998 · N724MB · Bolkms BO105S · Turbine Section > ENGINE REMOVED DUE TO OIL STARVATION AND METAL IN OIL. UPON INSPECTION OF TURBINE PARTS NOTED: CRACKED BEYOND SERVICEABLE LIMITS ON NR1 NOZZLE TRAILING EDGE VANES. INSTALLED A DALLAS AIRMOTIVE OVERHAULED NR1 NOZZLE. - [SDR HEEA0012867](https://openairdocs.org/sdr/HEEA0012867.md): Indicator · failed · Feb 6, 1998 · N724MB · Bolkms BO105S · Engine RPM Indicating System > TRIPLE INDICATOR ROTOR NEEDLE READS HIGH. UNIT OUT OF TOLERANCE. - [SDR HEEA0012117](https://openairdocs.org/sdr/HEEA0012117.md): Transmission · spalled · Nov 19, 1997 · N724MB · Bolkms BO105S · Main Rotor Gearbox > TRANSMISSION BEVEL GEARS HAVE EXCESSIVE SPALLING ON S/N 2195 AND MINOR ON S/N 2310 T.T. 3392:45 (TOOTH FAILURE) PINION S/N 3142, T.T. 353:20 SPALLING ON TOOTH (ROOT AREA) EXCESSIVE DENTS ON BEARINGS 2 EACH 4638303081, T.T. UNKNOWN AND 1 EACH 4638302025, S - [SDR HEEA0012070](https://openairdocs.org/sdr/HEEA0012070.md): Rpm Warning Box · intermittent · Nov 19, 1997 · N724MB · Bolkms BO105S · Main Rotor Indicating System > RPM WARN BOX INTERMITTENT OPERATION. - [SDR HEEA0011310](https://openairdocs.org/sdr/HEEA0011310.md): Indicator · sticks · Oct 8, 1997 · N724MB · Bolkms BO105S · Engine EGT/TIT Indicating System > NEEDLE STICKS AND READS HIGH. SENT TO MASCO FOR INSPECTION AND REPAIR. - [SDR HEEA0011309](https://openairdocs.org/sdr/HEEA0011309.md): Indicator · error · Oct 8, 1997 · N724MB · Bolkms BO105S · Engine EGT/TIT Indicating System > TOT INDICATOR INCORRECT INDICATION. ERRATIC AND WILL NOT CALIBRATE. TIME SINCE REPAIR 36:50. - [SDR HEEA0011266](https://openairdocs.org/sdr/HEEA0011266.md): Indicator · error · Oct 8, 1997 · N724MB · Bolkms BO105S · Engine RPM Indicating System > NR 1 NEEDLE HAS EXCESSIVE FRICTION ERROR. - [SDR HEEA0010998](https://openairdocs.org/sdr/HEEA0010998.md): Transmitter · wont test · Sep 10, 1997 · N724MB · Bolkms BO105S · Main Rotor Indicating System > TORQUE TRANSMITTER WILL NOT TEST PROPERLY. - [SDR HEEA0010997](https://openairdocs.org/sdr/HEEA0010997.md): Indicator · wont test · Sep 10, 1997 · N724MB · Bolkms BO105S · Main Rotor Indicating System > MAST MOMENT INDICATOR WONT TEST. - [SDR HEEA0010596](https://openairdocs.org/sdr/HEEA0010596.md): Tach Generator · seized shaft · Aug 6, 1997 · N724MB · Bolkms BO105S · Engine RPM Indicating System > TACH GENERATOR DRIVE SHAFT FROZEN. - [SDR HEEA0010237](https://openairdocs.org/sdr/HEEA0010237.md): Blade · cracked · Jun 25, 1997 · N724MB · Bolkms BO105S · Main Rotor Blades > M/R BLADE NOSE AND NECK SHELLS CRACKED. - [SDR HEEA0010186](https://openairdocs.org/sdr/HEEA0010186.md): Fuel Cell · cracked · Jun 19, 1997 · N724MB · Bolkms BO105S · Fuel Storage > FUEL CELL BLISTERS AND CRACKS AROUND FLANGES. - [SDR HEEA0010095](https://openairdocs.org/sdr/HEEA0010095.md): Set Screw Ring · unbonded · Jun 12, 1997 · N724MB · Bolkms BO105S · Main Landing Gear Strut/Axle/Truck > RUBBER COLLAR NOT PROPERLY BONDED TO ALUMINUM RING. - [SDR HEEA0010094](https://openairdocs.org/sdr/HEEA0010094.md): Set Screw Ring · unbonded · Jun 12, 1997 · N724MB · Bolkms BO105S · Main Landing Gear Strut/Axle/Truck > RUBBER COLLAR NOT PROPERLY BONDED TO ALUMINUM RING. - [SDR HEEA0010093](https://openairdocs.org/sdr/HEEA0010093.md): Set Screw Ring · unbonded · Jun 12, 1997 · N724MB · Bolkms BO105S · Main Landing Gear Strut/Axle/Truck > RUBBER COLLAR NOT PROPERLY BONDED TO ALUMINUM RING. - [SDR HEEA0010092](https://openairdocs.org/sdr/HEEA0010092.md): Set Screw Ring · unbonded · Jun 12, 1997 · N724MB · Bolkms BO105S · Main Landing Gear Strut/Axle/Truck > RUBBER COLLAR NOT PROPERLY BONDED TO ALUMINUM RING. - [SDR HEEA0010077](https://openairdocs.org/sdr/HEEA0010077.md): Blade · cracked · Jun 11, 1997 · N724MB · Bolkms BO105S · Main Rotor Blades > BLADE IS CRACKED. NOSE SHELL CRACKED. - [SDR HEEA0010076](https://openairdocs.org/sdr/HEEA0010076.md): Blade · cracked · Jun 11, 1997 · N724MB · Bolkms BO105S · Main Rotor Blades > BLADE IS CRACKED. NOSE AND NECK SHELLS CRACKED. THE TIP CAP IS ALSO UNBONDED. - [SDR HAIHEEA9689](https://openairdocs.org/sdr/HAIHEEA9689.md): Warning Box · malfunction · Apr 30, 1997 · N724MB · Bolkms BO105S · Rotor Drive Indicating System > RPM WARN COMES ON INTERMITTENTLY. TIME SINCE REPAIR 83:35. - [SDR HAIHEEA9435](https://openairdocs.org/sdr/HAIHEEA9435.md): Warning Box · malfunction · Apr 19, 1997 · N724MB · Bolkms BO105S · Rotor Drive Indicating System > RPM LIGHT FLASHES INTERMITTENTLY. - [SDR HEEA979183](https://openairdocs.org/sdr/HEEA979183.md): Bearing · spalled · Mar 12, 1997 · N724MB · Bolkms BO105S · Main Rotor Gearbox > BEARING EXCESSIVE SPALLING. REPLACED WITH NEW BEARING. - [SDR HEEA979091](https://openairdocs.org/sdr/HEEA979091.md): Transceiver · failed · Feb 11, 1997 · N724MB · Bolkms BO105S · VHF Communications System > TRANSCEIVER WILL NOT RECEIVE; SQUELCH STICKING. - [SDR HEEA968810](https://openairdocs.org/sdr/HEEA968810.md): Clutch · fail insp · Dec 30, 1996 · N724MB · Bolkms BO105S · Engine/Transmission Coupling > FAILED 600 HOUR INSPECTION. INNER CAGE WORN BEYOND LIMITS. REPLACED WITH SERVICEABLE CLUTCH. - [SDR HEEA968732](https://openairdocs.org/sdr/HEEA968732.md): Fuel Pump · malfunction · Dec 13, 1996 · N724MB · Bolkms BO105S · Engine Fuel Pump > FUEL PUMP FAULTY. ALSO CHANGED FILTER - [SDR HEEA968387](https://openairdocs.org/sdr/HEEA968387.md): Case Halves · cracked · Oct 18, 1996 · N724MB · Bolkms BO105S · Turbine Engine Compressor Section > ENGINE REMOVED DUE TO METAL IN OIL. UPON INSPECTION OF COMPRESSOR PARTS NOTED: PLASTIC CRACKED AND LIFTING ON CASE ASSEMBLY. INSTALLED A DALLAS AIRMOTIVE OVERHAULED CASE ASSEMBLY. - [SDR HEEA968362](https://openairdocs.org/sdr/HEEA968362.md): Gyro Compass · precesses · Oct 15, 1996 · N724MB · Bolkms BO105S · Directional Gyro and Indicating System > GYRO COMPASS EXCESSIVE PRECESSION. - [SDR HEEA967697](https://openairdocs.org/sdr/HEEA967697.md): Transceiver · defective · Aug 29, 1996 · N724MB · Bolkms BO105S · ATC Transponder System > REPAIR CRACKED FACEPLATE. REPLACED BROKEN FACEPLATE ASSEMBLY. ALSO REPLACED WEAK V101 CAVITY OSCILLATOR BECAUSE OF LOW POWER OUT. ADJUSTED AS NEEDED. BENCH CHECK GOOD. - [SDR HEEA967639](https://openairdocs.org/sdr/HEEA967639.md): Blade · cracked · Aug 8, 1996 · N724MB · Bolkms BO105S · Main Rotor Blades > M/R BLADE IS CRACKED. (NOSE AND NECK SHELL CRACKED AND SMALL AREAS OF SEPARATION ON THE LEADING EDGE STRIPS. - [SDR HEEA966356](https://openairdocs.org/sdr/HEEA966356.md): Cell · leaking · Jan 4, 1996 · N724MB · Bolkms BO105S · Fuel Storage > AFT FUEL CELL LEAKING FUEL. INSTALLED SERVICEABLE FUEL CELL. - [SDR HEEA955659](https://openairdocs.org/sdr/HEEA955659.md): Starter · failed · Aug 31, 1995 · N724MB · Bolkms BO105S · Starter-Generator > PILOT TRIED TO START ENGINE (MAX RPM 13% N1) AND TOT CLIMBED MUCH HIGHER THAN NORMAL. ABORTED START AND TRIED TO START ENGINE AGAIN, ENGINE WOULD NOT SPIN. SHUT #1 ENGINE DOWN. ENGAGED #2 STARTER AGAIN AND ONLY LOUD ARCING NOISE HEARD. REPLACED STARTER GENER - [SDR HEEA955629](https://openairdocs.org/sdr/HEEA955629.md): Transmitter · defective · Aug 25, 1995 · N724MB · Bolkms BO105S · Engine Oil Indicating System > #1 ENGINE OIL PRESSURE NEEDLE INDICATES FULL SCALE. REPLACED WITH SERVICEABLE TRANSMITTER. - [SDR HEEA955511](https://openairdocs.org/sdr/HEEA955511.md): Regulator · failed · Aug 2, 1995 · N724MB · Bolkms BO105S · DC Regulator > PEGS VOLTAGE METER INDICATOR TO TOP END. FOUND Q4 TRANSISTOR BAD AND CIRCUIT BOARD BURNT AROUND R65 RESISTOR. SCRAPPED VOLTAGE REGULATOR. - [SDR HEEA955307](https://openairdocs.org/sdr/HEEA955307.md): Transmitter · failed · Jul 5, 1995 · N724MB · Bolkms BO105S · Engine Oil Pressure > #1 ENGINE OIL PRESSURE INDICATOR PEGS ON HIGH SIDE IN FLIGHT. REPLACED #1 OIL PRESSURE TRANSMITTER AND RETURNED TO SERVICE. - [SDR HEEA954882](https://openairdocs.org/sdr/HEEA954882.md): Shaft · scored · Apr 25, 1995 · N724MB · Bolkms BO105S · Tail Rotor Drive Shaft > SLIDING SLEEVE AREA SCORING AND CORROSION AT BEARING SEAT. Next page: https://openairdocs.org/deregistered/N724MB-2001-03-12/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 = 'N724MB' AND deregistration_id = 'N724MB-2001-03-12' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/deregistered/N724MB-2001-03-12/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.