# Service difficulty reports: N51AG

A list on [N51AG](https://openairdocs.org/aircraft/N51AG.md).

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

- [SDR LS12003F00000](https://openairdocs.org/sdr/LS12003F00000.md): Skin · cracked · Jun 6, 2003 · N51AG · Bell UH1H · Rotorcraft Tail Boom
  > THE TAILBOOM FIRST 2 UPPER SKINS HAD NUMEROUS CRACKS. UNDER NORMAL OPERATIONS THESE CRACKS WOULD NEVER MATERIALIZE. THE AIRCRAFT HAS BEEN DOING LIFTING WORK. MUCH MORE THAN NORMAL OPERATIONS. THIS LOADS AND UNLOADS THE TAILBOOM NUMEROUS TIMES. THE RESULTI
- [SDR LS1R074916](https://openairdocs.org/sdr/LS1R074916.md): Battery · weak · Jul 20, 2001 · N51AG · Bell UH1H · Battery/Charger System
  > PART IS WEAK.
- [SDR LS1R072190](https://openairdocs.org/sdr/LS1R072190.md): Cable Drum · stretched · Apr 10, 2001 · N51AG · Bell UH1H · Flight Control System
  > CABLE DRUM STRETCHED.
- [SDR LS1R066445](https://openairdocs.org/sdr/LS1R066445.md): Bearing · rough · Feb 29, 2000 · N51AG · Bell UH1H · Tail Rotor Drive Indicating System
  > BEARING EXTREMELY ROUGH, AND RATCHETY.
- [SDR 99ZZZX3932](https://openairdocs.org/sdr/99ZZZX3932.md): Switch · malfunctioned · Sep 8, 1999 · N51AG · Bell UH1H · Main Rotor Gearbox
  > TRANSMISSION OIL HOT LIGHT COMES ON INTERMITTENTLY WITH TEMPERATURE IN GREEN. REMOVED AND REPLACED.
- [SDR 99ZZZX3891](https://openairdocs.org/sdr/99ZZZX3891.md): Indicator · malfunctioned · Sep 8, 1999 · N51AG · Bell UH1H · Airspeed/Mach Indicator
  > INDICATING FALSE AIRSPEED, SLOW TO CHANGE INDICATION. REMOVED AND REPLACED.
- [SDR 99ZZZX3889](https://openairdocs.org/sdr/99ZZZX3889.md): Indicator · malfunctioned · Sep 8, 1999 · N51AG · Bell UH1H · Airspeed/Mach Indicator
  > INDICATING FALSE AIRSPEED. SLOW TO CHANGE INDICATION. REMOVED AND REPLACED.
- [SDR 99ZZZX3890](https://openairdocs.org/sdr/99ZZZX3890.md): Pump · malfunctioned · Sep 7, 1999 · N51AG · Bell UH1H · Fuel Boost Pump
  > HEARD NOISE FROM LEFT FUEL CELL. CHECKED PRESSURE ON BOOST PUMP, FOUND TO BE LOW. REMOVED AND REPLACED PUMP.
- [SDR 99ZZZX2764](https://openairdocs.org/sdr/99ZZZX2764.md): Caution Panel · malfunctioned · Jul 9, 1999 · N51AG · Bell UH1H · Central Warning
  > TRANSMISSION OIL HOT LIGHT CAME ON, TEMPERATURE GAUGE IS NORMAL. REMOVED AND REPLACED.
- [SDR 99ZZZX2497](https://openairdocs.org/sdr/99ZZZX2497.md): Transceiver · failed · Jun 10, 1999 · N51AG · Bell UH1H · VHF Communications System
  > TRANSCEIVER WOULD NOT TRANSMIT. REMOVED AND REPLACED.
- [SDR 99ZZZX2493](https://openairdocs.org/sdr/99ZZZX2493.md): Skid Tube · dented · Jun 10, 1999 · N51AG · Bell UH1H · Emergency Flotation Section
  > SKID TUBE DENTED. REMOVED AND REPLACED.
- [SDR 99ZZZX2492](https://openairdocs.org/sdr/99ZZZX2492.md): Skid Tube · dented · Jun 10, 1999 · N51AG · Bell UH1H · Emergency Flotation Section
  > SKID TUBE DENTED. REMOVED AND REPLACED.
- [SDR 99ZZZX2245](https://openairdocs.org/sdr/99ZZZX2245.md): Altimeter · malfunctioned · May 12, 1999 · N51AG · Bell UH1H · Airspeed/Mach Indicator
  > ALTIMETER HAD EXCESSIVE FRICTION. FAILED CERTIFICATION. REMOVED AND REPLACED.
- [SDR 99ZZZX2244](https://openairdocs.org/sdr/99ZZZX2244.md): Audio Panel · malfunctioned · Apr 29, 1999 · N51AG · Bell UH1H · Entertainment System
  > AUDIO PANEL CAUSES STATIC IN PILOT'S HEAD SET.
- [SDR 98ZZZX3860](https://openairdocs.org/sdr/98ZZZX3860.md): Transponder · failed · Sep 23, 1998 · N51AG · Bell UH1H · ATC Transponder System
  > TRANSPONDER WOULD NOT TEST. SENT FOR REPAIR.
- [SDR 98ZZZX3633](https://openairdocs.org/sdr/98ZZZX3633.md): Encoder · failed · Sep 14, 1998 · N51AG · Bell UH1H · Altimeter, Barometric/Encoder
  > ENCODER TRIPS CIRCUIT BREAKER. REMOVED AND REPLACED.
- [SDR 98ZZZX3637](https://openairdocs.org/sdr/98ZZZX3637.md): Regulator · failed · Sep 10, 1998 · N51AG · Bell UH1H · DC Regulator
  > WILL NOT REGULATE VOLTAGE. REPLACED.
- [SDR 98ZZZX3548](https://openairdocs.org/sdr/98ZZZX3548.md): Driveshaft · damaged · Jul 10, 1998 · N51AG · Bell UH1H · Engine/Transmission Coupling
  > BALANCED WEIGHT NOT INSTALLED. DRIVESHAFT WAS REPLACED.
- [SDR 98ZZZX2789](https://openairdocs.org/sdr/98ZZZX2789.md): Indicator · failed · Jul 1, 1998 · N51AG · Bell UH1H · Attitude Gyro and Indicating System
  > ATTITUDE INDICATOR WILL NOT CAGE. REMOVED FROM AIRCRAFT.
- [SDR 98ZZZX2100](https://openairdocs.org/sdr/98ZZZX2100.md): Regulator · failed · May 13, 1998 · N51AG · Bell UH1H · DC Regulator
  > VOLTAGE REGULATOR WILL NOT HOLD A VOTLAGE SETTING, KEEPS FLUCTUATING. SENT FOR REPAIR. REF: CONTROL NR 98-5-8.
- [SDR 98ZZZX1738](https://openairdocs.org/sdr/98ZZZX1738.md): Regulator · failed · Apr 24, 1998 · N51AG · Bell UH1H · DC Regulator
  > VOLTAGE REGULATOR WILL NOT STAY ON LINE AND CANNOT BE ADJUSTED. REMOVED AND REPLACED AND SENT FOR REPAIR. CONTROL NR 98-4-11.
- [SDR 96ZZZX3912](https://openairdocs.org/sdr/96ZZZX3912.md): Hose · chafed · Jul 25, 1996 · N51AG · Bell UH1H · Hydraulic System, Main
  > DURING STRAIGHT AND LEVEL FLIGHT, PILOT NOTICED FLIGHT CONTROLS STARTING TO FEEL STIFF. THIS WAS IMMEDIATELY FOLLOWED BY A DROP IN HYDRAULIC PRESSURE. PILOT LANDED ACFT SAFELY IN A FIELD. MECHANIC WAS DISPATCHED AND FOUND A HYDRAULIC LINE HAD RUPTURED DUE T

## 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 = 'N51AG' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N51AG/reports

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