# Service difficulty reports: N424MB, cancelled Dec 27, 2013

A list on [N424MB, cancelled Dec 27, 2013](https://openairdocs.org/deregistered/N424MB-2013-12-27.md).

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

- [SDR QMLA2011093011097](https://openairdocs.org/sdr/QMLA2011093011097.md): Engine · power loss · Sep 30, 2011 · N424MB · Bolkms BK117A4 · Engine (Turbine/Turboprop)
  > THE PILOT REPORTED, AFTER PREFLIGHT AND CONFIRMATION CHECKS WERE CONDUCTED, LIFTED TO HOVER. USED THE ENGINE BEEP SWITCH TO SLIGHTLY INCREASE THE NR/N2 RPM TO 100 PERCENT. ON CLIMBOUT REACHING 900 FEET MSL, REDUCED COLLECTIVE TO 50 % ENGINE TORQUE TO ASSESS
- [SDR R7M2002F00017](https://openairdocs.org/sdr/R7M2002F00017.md): Battery · discharged · Mar 23, 2002 · N424MB · Bolkms BK117A3 · Battery/Charger System
  > LEAD ACID BATTERY WILL NOT HOLD A CHARGE. STAYS AT 20 VOLTS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 2001F00507](https://openairdocs.org/sdr/2001F00507.md): Torquemeter · erratic · Jul 19, 2001 · N424MB · Bolkms BK117A3 · Engine BMEP/Torque Indicating
  > TORQUEMETER INDICATOR INOPERATIVE. NR 1 NEEDLE JUMPS ERRATICALLY. RECEIVED NEW WITH A3 AND A4 CONVERSION KIT. THIS UNIT IS BRAND NEW MANUFACTURE, NOT OVERHAULED OR REPAIRED. REPLACED WITH REPAIRED UNIT CORRECTED PROBLEM. (M)
- [SDR 20000817SH001](https://openairdocs.org/sdr/20000817SH001.md): Thermocouple · shorted · Aug 18, 1999 · N424MB · Bolkms BK117A3 · Engine Temperature Indicating System
  > INTERNAL SHORT. REPLACED THERMOCOUPLE WITH NEW UNIT, CORRECTED PROBLEM. (X)
- [SDR 2000ZZZX775](https://openairdocs.org/sdr/2000ZZZX775.md): Seal · leaking · Aug 6, 1999 · N424MB · Bolkms BK117A3 · Turbine Engine Combustion Section
  > SEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 2000ZZZX774](https://openairdocs.org/sdr/2000ZZZX774.md): Tube · leaking · Aug 6, 1999 · N424MB · Bolkms BK117A3 · Engine Fuel Distribution
  > TUBE LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 2000ZZZX773](https://openairdocs.org/sdr/2000ZZZX773.md): Tube · leaking · Aug 6, 1999 · N424MB · Bolkms BK117A3 · Engine Oil Distribution (Airframe Furnished)
  > TUBE LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 2000ZZZX772](https://openairdocs.org/sdr/2000ZZZX772.md): Blade · damaged · Aug 6, 1999 · N424MB · Bolkms BK117A3 · Turbine Section
  > EXCESSIVE GP BLADE TIP RUB. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 2000ZZZX771](https://openairdocs.org/sdr/2000ZZZX771.md): Spring · worn · Aug 6, 1999 · N424MB · Bolkms BK117A3 · Turbine Engine Combustion Section
  > SPRING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 2000ZZZX770](https://openairdocs.org/sdr/2000ZZZX770.md): Seal · worn · Aug 6, 1999 · N424MB · Bolkms BK117A3 · Turbine Engine Combustion Section
  > SEAL RING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTIVE PROBLEM.
- [SDR 99ZZZX892](https://openairdocs.org/sdr/99ZZZX892.md): Bearing · worn · Nov 5, 1998 · N424MB · Bolkms BK117A3 · Tail Rotor Head
  > BEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 98ZZZX1797](https://openairdocs.org/sdr/98ZZZX1797.md): Bearing · worn · Mar 10, 1998 · N424MB · Bolkms BK117A3 · Tail Rotor Drive Shaft
  > BEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 98ZZZX1151](https://openairdocs.org/sdr/98ZZZX1151.md): Seal · leaked · Jul 24, 1997 · N424MB · Bolkms BK117A3 · Turbine Engine Compressor Section
  > LEFT ENGINE NR 2 BEARING SEAL, UPON INSTALLATION, UNIT LEAKED BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 97ZZZX5065](https://openairdocs.org/sdr/97ZZZX5065.md): Speed Pickup · failed · Jul 10, 1997 · N424MB · Bolkms BK117A3 · Engine RPM Indicating System
  > SPEED PICKUP UNIT FAILED TO TEST UPON INSTALLATION. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 96ZZZX5672](https://openairdocs.org/sdr/96ZZZX5672.md): Bellows · torn · May 16, 1996 · N424MB · Bolkms BK117A3 · Main Rotor Mast/Swashplate
  > BELLOWS IS TORN AROUND CLAMP AND FOLD AREAS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 95ZZZX5381](https://openairdocs.org/sdr/95ZZZX5381.md): Rotor Assy · blade shift · Aug 17, 1995 · N424MB · Bolkms BK117A3 · Turbine Section
  > FAILED SB LT101-72-10-0153. EXCESSIVE IBPT BLADE SHIFT. REPLACED WITH USED UNIT, CORRECTED PROBLEM. PART TOTAL CYCLES, 3788.0.
- [SDR 96ZZZX1666](https://openairdocs.org/sdr/96ZZZX1666.md): Bolt · worn · Jun 23, 1995 · N424MB · Bolkms BK117A3 · Tail Rotor Head
  > BOLT WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- [SDR 96ZZZX1665](https://openairdocs.org/sdr/96ZZZX1665.md): Bushing · worn · Jun 6, 1995 · N424MB · Bolkms BK117A3 · Main Rotor Blades
  > TEFLON LINERS WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH 8 EACH NEW UNITS, CORRECTED PROBLEM.
- [SDR 95ZZZX5271](https://openairdocs.org/sdr/95ZZZX5271.md): Seal · leaking · May 19, 1995 · N424MB · Bolkms BK117A3 · Turbine Engine Compressor Section
  > NR 2 BEARING SEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT(S) CORRECTED PROBLEM.
- [SDR 95ZZZX5270](https://openairdocs.org/sdr/95ZZZX5270.md): Seal · leaking · May 19, 1995 · N424MB · Bolkms BK117A3 · Turbine Section
  > NR 3 BEARING SEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNITS(S) CORRECTED PROBLEM.
- [SDR 95ZZZY0990](https://openairdocs.org/sdr/95ZZZY0990.md): Transducer · malfunction · May 10, 1995 · N424MB · Bolkms BK117A3 · Engine Oil Pressure
  > OIL PRESSURE FLUCTUATION. REPLACED WITH NEW UNIT(S), CORRECTED PROBLEM.
- [SDR 95ZZZY0967](https://openairdocs.org/sdr/95ZZZY0967.md): Relay · shorted · May 10, 1995 · N424MB · Bolkms BK117A3 · DC Generating System
  > SUSPECT RELAY HAS INTERNAL SHORT, UPON INSTALLATION UNIT POPS CIRCUIT BREAKER. REPLACED WITH NEW UNIT(S), CORRECTED PROBLEM.
- [SDR 96ZZZX506](https://openairdocs.org/sdr/96ZZZX506.md): Seal · leaking · Mar 12, 1995 · N424MB · Bolkms BK117A3 · Turbine Section
  > SEAL LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. ENGINE TOTAL CYCLES, 7,314.4.
- [SDR 96ZZZX505](https://openairdocs.org/sdr/96ZZZX505.md): Bearing · worn · Mar 12, 1995 · N424MB · Bolkms BK117A3 · Turbine Engine Compressor Section
  > BEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. ENGINE TOTAL CYCLES, 7,314.4
- [SDR 95ZZZX5561](https://openairdocs.org/sdr/95ZZZX5561.md): Rotary Assy · disc damage · Mar 12, 1995 · N424MB · Bolkms BK117A3 · Turbine Section
  > DISC HAS EXCESSIVE DAMAGE (WARPED CAUSING LOOSE BLADES) RESULTING FROM LAB SEAL ELEMENT RUBBING INTO DISC KNIFE EDGES. THIS LAB SEAL HAS FEWER WELD POINTS AS COMPARED TO THE MORE RECENT SEAL DESIGN. THE LAB SEAL WAS INSTALLED NEW AS A PART OF SB 126 UPGRADE.
- [SDR 95ZZZX5378](https://openairdocs.org/sdr/95ZZZX5378.md): Rotor Assy · blade shift · Mar 12, 1995 · N424MB · Bolkms BK117A3 · Turbine Section
  > FAILED SB LT101-72-10-0153. EXCESSIVE IBPT BLADE SHIFT NR 7, PLUS 0.008 INCH, NR 10, PLUS 0.008 INCH. REPLACED WITH USED UNIT, CORRECTED PROBLEM. PART TOTAL CYCLES 4406.5.

## 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 = 'N424MB' AND deregistration_id = 'N424MB-2013-12-27'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/deregistered/N424MB-2013-12-27/reports

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