# Service difficulty reports: N91070, cancelled May 13, 2003 A list on [N91070, cancelled May 13, 2003](https://openairdocs.org/deregistered/N91070-2003-05-13.md). Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first. - [SDR HEEA065172](https://openairdocs.org/sdr/HEEA065172.md): Pump · inoperative · Nov 15, 1999 · N91070 · Bolkms BO105S · Fuel Boost Pump > FUEL PUMP INOPERATIVE. - [SDR HEEA065161](https://openairdocs.org/sdr/HEEA065161.md): Hub · corroded · Nov 15, 1999 · N91070 · Bolkms BO105S · Main Rotor Head > MAIN ROTOR HUB HAD CORROSION ON ALL FOUR PITCH HORNS. - [SDR HEEA064389](https://openairdocs.org/sdr/HEEA064389.md): Tie Bolt · mismanufactured · Sep 23, 1999 · N91070 · Bolkms BO105S · Turbine Section > TIE BOLT INSPECTION REVEALED FREE LENGTH OVER MAX LIMITS AT 6.888 INCHES. - [SDR HEEA060462](https://openairdocs.org/sdr/HEEA060462.md): Switch · malfunctioned · Jan 25, 1999 · N91070 · Bolkms BO105S · Engine Oil Indicating System > WARNING LIGHT WILL NOT ILLUMINATE ZERO PRESSURE. - [SDR 98ZZZX4803](https://openairdocs.org/sdr/98ZZZX4803.md): Turbine Rotor · failed · Dec 7, 1998 · N91070 · Bolkms BO105C · Turbine Section > NR 2 ENGINE OIL PRESSURE BEGAN TO FLUCTUATE IN CRUISE. LANDED WITHOUT INCIDENT. OIL LEVEL ONE AND ONE-HALF QUARTS LOW ON OIL. NO LEAKS NOTED. RE-SERVICED AND RETURNED TO SERVICE AFTER PENALTY RUN AND CHECK. FOLLOW-UP CHECK REVEALED ENGINE OIL CONSUMPTION. - [SDR HEEA0016030](https://openairdocs.org/sdr/HEEA0016030.md): Starter · overheated · Sep 11, 1998 · N91070 · Bolkms BO105S · Starter-Generator > EVIDENCE OF OVERHEATING ON TERMINAL BLOCK. - [SDR HEEA0015266](https://openairdocs.org/sdr/HEEA0015266.md): Transceiver · failed · Jul 27, 1998 · N91070 · Bolkms BO105S · VHF Communications System > TRANSCEIVER CAN'T RECEIVE OR TRANSMIT. - [SDR HEEA0015095](https://openairdocs.org/sdr/HEEA0015095.md): Switch · faulty · Jul 1, 1998 · N91070 · Bolkms BO105S · Engine Oil Indicating System > TRANSMISSION PRESSURE LIGHT WILL NOT GO OUT. - [SDR HEEA0014661](https://openairdocs.org/sdr/HEEA0014661.md): Switch · inoperative · Jun 8, 1998 · N91070 · Bolkms BO105S · Engine Oil Pressure > OIL PRESSURE SWITCH UNIT WOULD NOT COME ON WITH BATTERY SWITCH. - [SDR HEEA0014612](https://openairdocs.org/sdr/HEEA0014612.md): Floor Panel · corroded · Jun 5, 1998 · N91070 · Bolkms BO105S · Fuselage Floor Panel > FLOOR PANEL CORRODED AND SEPARATED. - [SDR HEEA0014596](https://openairdocs.org/sdr/HEEA0014596.md): Indicator · reads high · Jun 4, 1998 · N91070 · Bolkms BO105S · Engine RPM Indicating System > NR 1 NEEDLE STICKS AND STAYS 2 PERCENT HIGHER THAN OTHER NEEDLES. - [SDR HEEA0014162](https://openairdocs.org/sdr/HEEA0014162.md): Indicator · defective · May 11, 1998 · N91070 · Bolkms BO105S · Integrated Flight System > HSI INDICATOR HAS LOOSE PARTS INSIDE. - [SDR HEEA0013252](https://openairdocs.org/sdr/HEEA0013252.md): Fire Cont Unit · malfunction · Mar 4, 1998 · N91070 · Bolkms BO105S · Fire Detection > L/H ENGINE FIRE LIGHT INTERMITTENTLY STICKS ON. - [SDR HEEA0013201](https://openairdocs.org/sdr/HEEA0013201.md): Blade · erroded · Mar 4, 1998 · N91070 · Bolkms BO105S · Tail Rotor Blades > PAINT EROSION AT BLADE TIP ON S/N 646. PAINT EROSION AND RUBBER COATING PEELED OFF AT BLADE TIP ON S/N 655. - [SDR HEEA0012849](https://openairdocs.org/sdr/HEEA0012849.md): Transmitter · failed · Feb 5, 1998 · N91070 · Bolkms BO105S · Fuel Pressure Indicator > PRESSURE DROPS TO ZERO. - [SDR HEEA0012150](https://openairdocs.org/sdr/HEEA0012150.md): Transducer · shorted · Nov 28, 1997 · N91070 · Bolkms BO105S · Fuel Pressure Indicator > TRANSDUCER INTERNALLY SHORTED. - [SDR HEEA0012149](https://openairdocs.org/sdr/HEEA0012149.md): Transducer · failed · Nov 28, 1997 · N91070 · Bolkms BO105S · Fuel Pressure Sensor > TRANSDUCER TRANSMITS OUT OF TOLERANCE THROUGHOUT SCALE. - [SDR HEEA0012148](https://openairdocs.org/sdr/HEEA0012148.md): Transducer · failed · Nov 28, 1997 · N91070 · Bolkms BO105S · Fuel Pressure Sensor > TRANSDUCER INTERNALLY SHORTED. - [SDR HEEA0011956](https://openairdocs.org/sdr/HEEA0011956.md): Transducer · failed · Nov 12, 1997 · N91070 · Bolkms BO105S · Fuel Pressure Sensor > TRANSDUCER NO PRESSURE INDICATION. CAUSES THE GAUGE TO PEG TO ZERO SIDE ALL THREE PRESSURE BOTH ENGINES AND TRANS. INDICATOR ON SAME GAUGE. - [SDR HEEA0011955](https://openairdocs.org/sdr/HEEA0011955.md): Transducer · failed · Nov 12, 1997 · N91070 · Bolkms BO105S · Fuel Pressure Sensor > TRANSDUCER HAS NO PRESSURE INDICATION. - [SDR HEEA0011609](https://openairdocs.org/sdr/HEEA0011609.md): Oil Cooler · leaking · Oct 21, 1997 · N91070 · Bolkms BO105S · Engine Oil Cooler > OIL COOLER LEAK AT LOW CENTER RIGHT SIDE. - [SDR HEEA0011608](https://openairdocs.org/sdr/HEEA0011608.md): Oil Cooler · leaking · Oct 21, 1997 · N91070 · Bolkms BO105S · Engine Oil Cooler > OIL COOLER WAS REPAIRED BY VENDOR ON 6-11-97. FOUND LEAKING AT TWO PLACES. - [SDR HEEA0011524](https://openairdocs.org/sdr/HEEA0011524.md): Torquemeter · malfunction · Oct 15, 1997 · N91070 · Bolkms BO105S · Engine BMEP/Torque Indicating > DUAL TORQUE METER RANGE MARKING PAINT FLAKING. NR1 TORQUE NEEDLE BOUNCES DURING FLIGHT. - [SDR HEEA0010615](https://openairdocs.org/sdr/HEEA0010615.md): Sun Gear · spalled · Aug 7, 1997 · N91070 · Bolkms BO105S · Main Rotor Gearbox > SPALLING. REPLACED WITH SERVICEABLE PART. - [SDR HEEA0010614](https://openairdocs.org/sdr/HEEA0010614.md): Planetary Axle · spalled · Aug 7, 1997 · N91070 · Bolkms BO105S · Main Rotor Gearbox > SPALLING. REPLACED WITH SERVICEABLE AXLE. - [SDR HEEA0010424](https://openairdocs.org/sdr/HEEA0010424.md): Clutch · broken · Jul 9, 1997 · N91070 · Bolkms BO105S · Engine/Transmission Coupling > FREEWHEEL CLUTCH HAS BROKEN CAGE. - [SDR HEEA0010283](https://openairdocs.org/sdr/HEEA0010283.md): Shaft · cracked · Jun 26, 1997 · N91070 · Bolkms BO105S · Tail Rotor Drive Shaft > PLATING PEALING MICRO CRACKS ON JOURNAL D & F. - [SDR HEEA0010233](https://openairdocs.org/sdr/HEEA0010233.md): Servo Motor · intermittent · Jun 25, 1997 · N91070 · Bolkms BO105S · Fuel Controlling System > SERVO MOTOR WORKS INTERMITTENTLY. - [SDR HEEA0010097](https://openairdocs.org/sdr/HEEA0010097.md): Clutch · broken · Jun 12, 1997 · N91070 · Bolkms BO105S · Engine/Transmission Coupling > BROKEN CAGE. REPLACED WITH NEW CLUTCH. ALSO PINION P/N 4638202002, S/N 488, T.T. UNKNOWN AND F/W OUTER SHAFT P/N 4638302045, S/N 315, T.T. UNKNOWN REPLACED DUE TO DAMAGE CAUSED BY CLUTCH FAILURE. - [SDR HEEA0010073](https://openairdocs.org/sdr/HEEA0010073.md): Transceiver · failed · Jun 11, 1997 · N91070 · Bolkms BO105S · VHF Communications System > WILL NOT TRANSMIT OR RECEIVE. NO DISPLAY. DISPLAY BOARD BURNT. - [SDR HEEA0010033](https://openairdocs.org/sdr/HEEA0010033.md): Oil Cooler · cracked · Jun 4, 1997 · N91070 · Bolkms BO105S · Engine Oil Cooler > OIL COOLER CRACKED. - [SDR HAIHEEA9989](https://openairdocs.org/sdr/HAIHEEA9989.md): Clutch · broken cage · May 30, 1997 · N91070 · Bolkms BO105S · Engine/Transmission Coupling > FREEWHEEL CLUTCH HAS BROKEN CAGE. - [SDR HEEA968718](https://openairdocs.org/sdr/HEEA968718.md): Shaft · pitted · Dec 13, 1996 · N91070 · Bolkms BO105S · Tail Rotor Drive Shaft > T/R SHAFT PITTING PITTING AT INBOARD BEARING JOURNAL. - [SDR HEEA967506](https://openairdocs.org/sdr/HEEA967506.md): Indicator · reads high · Jul 5, 1996 · N91070 · Bolkms BO105S · Engine EGT/TIT Indicating System > READS 20 DEGREES HIGH AND WON'T CALIBRATE. - [SDR HEEA956108](https://openairdocs.org/sdr/HEEA956108.md): Loran · defective · Nov 21, 1995 · N91070 · Bolkms BO105S · Long-Range Navigation (LORAN) System > TAKES LONG TIME TO COME ON AND GOES OUT DURING FLIGHT. - [SDR HEEA956092](https://openairdocs.org/sdr/HEEA956092.md): Clutch · worn · Nov 21, 1995 · N91070 · Bolkms BO105S · Engine/Transmission Coupling > INNER CAGE WORN BEYOND LIMITS. REPLACED WITH SERVICEABLE CLUTCH. - [SDR 96ZZZX3462](https://openairdocs.org/sdr/96ZZZX3462.md): Pack Assy · defective · Sep 18, 1995 · N91070 · Bolkms BO105C · Hydraulic Pump (Electric/Engine), Main > DURING CRUISE FLIGHT, NOSE OF AIRCRAFT SUDDENLY PITCHED NOSE DOWN, HYDRAULIC BLOCK LIGHT ILLUMINATED, MAST MOMENT INDICATOR LIGHT ILLUMINATED. AFTER RECOVERY TO LEVEL ATTITUDE, AIRCRAFT LANDED WITHOUT INCIDENT. - [SDR HEEA955670](https://openairdocs.org/sdr/HEEA955670.md): Switch · malfunction · Aug 31, 1995 · N91070 · Bolkms BO105S · Fuel Pressure Indicating > #2 ENGINE DIFFERENTIAL PRESSURE SWITCH WOULD NOT FUNCTION CHECK AS PER BO-105 M & O CHAPTER 62 PAGE 43 PARA. 62-39 ITEM #2. REPLACED DIFFERENTIAL PRESSURE SWITCH. - [SDR HEEA955438](https://openairdocs.org/sdr/HEEA955438.md): Transducer · defective · Jul 24, 1995 · N91070 · Bolkms BO105S · Fuel Pressure Sensor > READS HIGH OUT OF TOLERANCE. - [SDR HEEA954727](https://openairdocs.org/sdr/HEEA954727.md): Indicator · reads high · Apr 10, 1995 · N91070 · Bolkms BO105S · Engine EGT/TIT Indicating System > NEEDLE INDICATES 20 DEGREES CELSIUS HIGH THROUGHOUT SCALE. - [SDR HEEA954393](https://openairdocs.org/sdr/HEEA954393.md): Wheel · sulfidation · Feb 21, 1995 · N91070 · Bolkms BO105S · Turbine Section > ENGINE REMOVED DUE TO HIGH TOT. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: SULFIDATION ON ALL 3RD STAGE WHEEL BLADE LEADING EDGES AND OUTER BAND I.D. SCRAPPED 3RD STAGE WHEEL. - [SDR HEEA954392](https://openairdocs.org/sdr/HEEA954392.md): Wheel · sulfidation · Feb 21, 1995 · N91070 · Bolkms BO105S · Turbine Section > ENGINE REMOVED DUE TO HIGH TOT. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: SULFIDATION ON 1ST STAGE WHEEL BLADES. SCRAPPED 1ST STAGE WHEEL. - [SDR HEEA954390](https://openairdocs.org/sdr/HEEA954390.md): Blade · deterioration · Feb 16, 1995 · N91070 · Bolkms BO105S · Tail Rotor Blades > RUBBER DETERIORATION. - [SDR HEEA954389](https://openairdocs.org/sdr/HEEA954389.md): Blade · damaged · Feb 16, 1995 · N91070 · Bolkms BO105S · Tail Rotor Blades > DAMAGE ON TRAILING EDGE. - [SDR HEEA954331](https://openairdocs.org/sdr/HEEA954331.md): Clutch · cracked · Feb 10, 1995 · N91070 · Bolkms BO105S · Engine/Transmission Coupling > UPON 1200 HOUR INSPECTION FOUND SPRAG RETAINER CRACKED AND WORN BEYOND LIMITS. REPLACED WITH SERVICEABLE CLUTCH ASSEMBLY. ## 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 = 'N91070' AND deregistration_id = 'N91070-2003-05-13' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/deregistered/N91070-2003-05-13/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.