# SDR 2005F00021

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 13, 2005
- Submitted: March 3, 2005
- Operation: Air carrier
- Aircraft: N4AE
- Make and model: Aerosp ATR 72-212
- Registry model: [Aerosp ATR 72-212](https://openairdocs.org/model/aerospatiale-atr-72-212) (OpenAirDocs)
- Aircraft serial: 244
- System (JASC): [3260 · Landing Gear Position and Warning](https://openairdocs.org/jasc/3260)
- Part: Proximity Switch
- Part number: DHE1148
- Condition: Faulty
- Location: Nlg
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2005F00021

## Discrepancy

ON TAKEOFF, WHEN GEAR SELECTED TO THE UP POSITION, ALL UPLOCK INDICATION ON NR 1 AND NR 2 PANELS AND THE GREEN HYD PUMP PRESSURE FLUCTUATES BETWEEN 1500 PSI TO 3000 PSI.  ALSO, HEARD A HARD NOISE.  AIRCRAFT RETURNED TO AIRPORT.  REPLACED BOTH PROXIMITY SWITCHES AT THE NOSE GEAR.  (M)

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