# Service difficulty reports: N158BK, cancelled Jul 1, 2013

A list on [N158BK, cancelled Jul 1, 2013](https://openairdocs.org/deregistered/N158BK-2013-07-01.md).

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first.

- [SDR QML2008F00004](https://openairdocs.org/sdr/QML2008F00004.md): Modulator · sticking · Jun 12, 2008 · N158BK · Bolkms BK117A4 · Compressor Bleed Control
  > DURING ANNUAL TRAINING/CHECK RIDE, THERE DEVELOPED AN UNCOMMANDED, INTERMITTENT TORQUE SPLITS OF UP TO 25 PERCENT WITH NO COLLECTIVE MOVEMENTS OR TORQUE MATCHING ATTEMPTS. N1 AND TOT INDICATIONS FOLLOWED EACH ENGINE THROUGH THE SPLITS. FURTHER TROUBLESHOOTING
- [SDR 705805272008](https://openairdocs.org/sdr/705805272008.md): Actuator · failed · May 27, 2008 · N158BK · Bolkms BK117A4 · Engine (Turbine/Turboprop)
  > AFTER DROPPING A PATIENT OFF AT THE HOSPITAL, ON THE RETURN LEG TO THE AIRCRAFT HOME BASE, IN CRUISE FLT, THE NR 1 ENGINE FAILED TO FOLLOW COLLECTIVE MOVEMENTS AND STAYED FIXED AT 60 PERCENT TORQUE. THE NR 2 ENGINE RESPONDED APPROPRIATELY, CAUSING LARGE TORQU
- [SDR R7MA33729](https://openairdocs.org/sdr/R7MA33729.md): Impeller · cracked · Nov 13, 2001 · N158BK · Bolkms BK117A3 · Turbine Engine Compressor Section
  > CRACKED COMPRESSOR IMPELLER BLADE. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 20001107SH015](https://openairdocs.org/sdr/20001107SH015.md): Thermocouple · shorted · Jun 3, 2000 · N158BK · Bolkms BK117A3 · Engine Temperature Indicating System
  > THERMOCOUPLE HAD INTERNAL SHORT. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. (X)
- [SDR 20001107SH014](https://openairdocs.org/sdr/20001107SH014.md): Thermocouple · shorted · Jun 3, 2000 · N158BK · Bolkms BK117A3 · Engine Temperature Indicating System
  > THERMOCOUPLE HAD INTERNAL SHORT. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. (X)
- [SDR 20001107SH013](https://openairdocs.org/sdr/20001107SH013.md): Seal · leaking · Jun 3, 2000 · N158BK · Bolkms BK117A3 · Turbine Section
  > SEAL - NR 3 BEARING, LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. (X)
- [SDR 20001107SH012](https://openairdocs.org/sdr/20001107SH012.md): Curl · damaged · Jun 3, 2000 · N158BK · Bolkms BK117A3 · Turbine Engine Combustion Section
  > CURL ASSY - COMBUSTION CHAMBER, EXCESSIVE BURN IN SOME AREAS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. (X)
- [SDR 20001107SH011](https://openairdocs.org/sdr/20001107SH011.md): Bearing · worn · Jun 3, 2000 · N158BK · Bolkms BK117A3 · Turbine Engine Compressor Section
  > BEARING - CYLINDER ROLLER NR 2, WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. (X)
- [SDR 20001107SH010](https://openairdocs.org/sdr/20001107SH010.md): Spring · worn · Jun 3, 2000 · N158BK · Bolkms BK117A3 · Turbine Section
  > SPRING - SEAL RING EXPANDER, WORN BEYOND SERVICEABLE LIMITS. REPLACED 2 EACH WITH NEW UNITS, CORRECTED PROBLEM. (X)
- [SDR 20001107SH009](https://openairdocs.org/sdr/20001107SH009.md): Seal · worn · Jun 3, 2000 · N158BK · Bolkms BK117A3 · Turbine Section
  > SEAL RING - FIRST TURBINE SHROUD, WORN BEYOND SERVICEABLE LIMITS. REPLACED 2 EACH WITH NEW UNITS, CORRECTED PROBLEM. (X)
- [SDR 20001107SH008](https://openairdocs.org/sdr/20001107SH008.md): Bearing · corroded · Jun 3, 2000 · N158BK · Bolkms BK117A3 · Turbine Engine Compressor Section
  > BEARING - ANNULAR BALL, COMPRESSOR, EXCESSIVE PITTING REPLACED WITH NEW UNIT, CORRECTED. PROBLEM. (X)
- [SDR 20001107SH007](https://openairdocs.org/sdr/20001107SH007.md): Tube · worn · Jun 3, 2000 · N158BK · Bolkms BK117A3 · Fuel Controlling System
  > TUBE-START ASSIST TO MANIFOLD FEED WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. (X)
- [SDR 20000918SH008](https://openairdocs.org/sdr/20000918SH008.md): Ignition Lead · shorted · Apr 12, 2000 · N158BK · Bolkms BK117A3 · Ignition Harness (Distribution)
  > INTERNAL SHORT. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. (X)
- [SDR 20000918SH007](https://openairdocs.org/sdr/20000918SH007.md): Ignition Lead · shorted · Apr 12, 2000 · N158BK · Bolkms BK117A3 · Ignition Harness (Distribution)
  > IGNITION HAD INTERNAL SHORT. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. (X)
- [SDR 99ZZZX4073](https://openairdocs.org/sdr/99ZZZX4073.md): Speed Pickup · inoperative · Jul 18, 1999 · N158BK · Bolkms BK117A3 · Main Rotor Indicating System
  > SPEED PICKUP INOPERATIVE. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 99ZZZX3807](https://openairdocs.org/sdr/99ZZZX3807.md): Bolt · worn · Jul 9, 1999 · N158BK · Bolkms BK117A3 · Tail Rotor Head
  > BOLT WORN BEYOND SERVICEABLE LIMITS.
- [SDR 99ZZZX783](https://openairdocs.org/sdr/99ZZZX783.md): Bearing · corroded · Jan 8, 1999 · N158BK · Bolkms BK117A3 · Starter-Generator
  > BEARING REJECTED NEW OUT-OF BOX. EXCESSIVE CORROSION. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 99ZZZX782](https://openairdocs.org/sdr/99ZZZX782.md): Bearing · corroded · Jan 8, 1999 · N158BK · Bolkms BK117A3 · Starter-Generator
  > BEARING REJECTED NEW OUT-OF-BOX. EXCESSIVE CORROSION. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 99ZZZX781](https://openairdocs.org/sdr/99ZZZX781.md): Bearing · corroded · Jan 8, 1999 · N158BK · Bolkms BK117A3 · Starter-Generator
  > BEARING REJECTED NEW OUT-OF-BOX. EXCESSIVE CORROSION. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 99ZZZX780](https://openairdocs.org/sdr/99ZZZX780.md): Bearing · corroded · Jan 8, 1999 · N158BK · Bolkms BK117A3 · Starter-Generator
  > CLUTCH BEARING REJECTED NEW OUT-OF-BOX. EXCESSIVE CORROSION. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 99ZZZX890](https://openairdocs.org/sdr/99ZZZX890.md): Bearing · worn · Sep 18, 1998 · N158BK · Bolkms BK117A3 · Tail Rotor Head
  > BEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 98ZZZX3374](https://openairdocs.org/sdr/98ZZZX3374.md): Pickup · failed · Jul 4, 1998 · N158BK · Bolkms BK117A3 · Engine RPM Indicating System
  > PICKUP UNIT INOPERATIVE. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 98ZZZX3384](https://openairdocs.org/sdr/98ZZZX3384.md): Harness · failed · Mar 9, 1998 · N158BK · Bolkms BK117A3 · Engine Indicating System
  > HARNESS HAS INTERNAL SHORT. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 98ZZZX105](https://openairdocs.org/sdr/98ZZZX105.md): Computer · inoperative · Nov 24, 1997 · N158BK · Bolkms BK117A3 · Autopilot Computer
  > COMPUTER UNIT INOPERATIVE. REPLACED WITH USED UNIT, CORRECTED PROBLEM.
- [SDR 98ZZZX1150](https://openairdocs.org/sdr/98ZZZX1150.md): Seal · leaking · Jul 28, 1997 · N158BK · Bolkms BK117A3 · Turbine Section
  > LEFT ENGINE NR 3 BEARING LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 98ZZZX1149](https://openairdocs.org/sdr/98ZZZX1149.md): Seal · leaking · Jul 28, 1997 · N158BK · Bolkms BK117A3 · Turbine Engine Compressor Section
  > LEFT ENGINE NR 1 BEARING LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 98ZZZX106](https://openairdocs.org/sdr/98ZZZX106.md): Rotor Assy · failed · Jul 28, 1997 · N158BK · Bolkms BK117A3 · Turbine Section
  > ROTOR ASSY FAILED SB LT101-72-10-0153, Q-ROTOR = 12.36 GMIN2. EXCESSIVE IBPT BLADE SHIFT. REPLACED WITH USED UNIT, CORRECTED PROBLEM. PART TOTAL CYCLES, 3,148.
- [SDR 96ZZZX5669](https://openairdocs.org/sdr/96ZZZX5669.md): Bellows · torn · Jul 31, 1996 · N158BK · Bolkms BK117A3 · Main Rotor Mast/Swashplate
  > BELLOWS IS TORN AROUND CLAMP AND FOLD AREAS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM
- [SDR 96ZZZX1576](https://openairdocs.org/sdr/96ZZZX1576.md): Seal · leaking · Nov 29, 1995 · N158BK · Bolkms BK117A3 · Turbine Engine Compressor Section
  > SEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 96ZZZX1575](https://openairdocs.org/sdr/96ZZZX1575.md): Seal Ring · worn · Nov 29, 1995 · N158BK · Bolkms BK117A3 · Turbine Section
  > SEAL RING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH 2 EACH NEW UNITS, CORRECTED PROBLEM.
- [SDR 95ZZZX5726](https://openairdocs.org/sdr/95ZZZX5726.md): Blade · skin deformed · Jun 24, 1995 · N158BK · Bolkms BK117A3 · Main Rotor Blades
  > BLADE FAILED INSPECTION FOR SKIN DEFORMATION AND LOOP ROVING. BLADE IS LOCATED AT CTI.
- [SDR 95ZZZX5725](https://openairdocs.org/sdr/95ZZZX5725.md): Blade · skin deformed · Jun 24, 1995 · N158BK · Bolkms BK117A3 · Main Rotor Blades
  > BLADE FAILED INSPECTION FOR SKIN DEFORMATION AND LOOP ROVING. BLADE IS LOCATED AT CTI.
- [SDR 95ZZZY0968](https://openairdocs.org/sdr/95ZZZY0968.md): Bellows · torn · May 10, 1995 · N158BK · Bolkms BK117A3 · Main Rotor Mast/Swashplate
  > BELLOWS IS TORN AROUND CLAMP AND FOLD AREAS. REPLACED WITH NEW UNIT(S), CORRECTED PROBLEM.
- [SDR 95ZZZX5483](https://openairdocs.org/sdr/95ZZZX5483.md): Transmitter · failed · Apr 13, 1995 · N158BK · Bolkms BK117A3 · Integrated Flight System
  > TRANSMITTER DEFECTIVE. SPINS RMI/HSI. CARDS IN SLAVE MODE. REPLACED WITH NEW UNIT(S) CORRECTED PROBLEM.
- [SDR 95ZZZY0721](https://openairdocs.org/sdr/95ZZZY0721.md): Transmitter · failed · Apr 5, 1995 · N158BK · Bolkms BK117A3 · Main Rotor Gearbox
  > PRESSURE TRANSMITTER WORKED FOR FIRST 30 MIN. FROM INSTALLATION. AFTER 30 MIN. UNIT FAILED TO INDICATE. REPLACED WITH NEW UNIT(S) CORRECTED PROBLEM.
- [SDR 95ZZZY0720](https://openairdocs.org/sdr/95ZZZY0720.md): Transmitter · failed · Apr 5, 1995 · N158BK · Bolkms BK117A3 · Main Rotor Gearbox
  > PRESSURE TRANSMITTER WORKED FOR 30 MINUTES FROM INSTALLATION. AFTER 30 MINUTES UNIT FAILED TO INDICATE. REPLACED WITH NEW UNIT(S) CORRECTED PROBLEM.
- [SDR 95ZZZX5484](https://openairdocs.org/sdr/95ZZZX5484.md): Flange Bushing · scored · Feb 23, 1995 · N158BK · Bolkms BK117A3 · Main Rotor Head
  > FLANGE BUSHING HAS EXCESSIVE SCORING. REPLACED WITH NEW UNIT(S) CORRECTED PROBLEM.

## 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 = 'N158BK' AND deregistration_id = 'N158BK-2013-07-01'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/deregistered/N158BK-2013-07-01/reports

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