# SDR CHQA200900061

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 20, 2009
- Submitted: February 23, 2009
- Operation: Air carrier
- Aircraft: N572RP
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 14500828
- Aircraft time: 11,735 hours, 9,865 cycles
- Engine: Rroyce AE3007A1P
- Engine time: 15,112 hours, 12,464 cycles
- System (JASC): [3222 · Nose/Tail Landing Gear Strut/Axle](https://openairdocs.org/jasc/3222)
- Part: Strut
- Part number: 1172C000002
- Part serial: SP88704
- Condition: Underserviced
- Location: Nlg
- Part time: 11,742 hours, 9,871 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: W, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CHQA200900061

## Discrepancy

UPON GEAR RETRACTION THE CREW RECEIVED A L/G AIR/GND FAIL MESSAGE ON THE EICAS.  FOLLOWED SHORTLY BY E1-2 REVERSE DISAGREE MESSAGE.  THE CREW RETURNED TO THE FIELD AND BOTH MESSAGES CLEARED ON GEAR EXTENSION.  A NORMAL LANDING WAS MADE.  UPON INSPECTION BY MAINTENANCE, IT WAS FOUND THAT THE NOSE LANDING GEAR WAS NOT EXTENDING OR CENTERING PROPERLY.  THE NOSE STRUT WAS SERVICED AND A LOOSE CONNECTOR ON THE RT AFT DOWN LOCK SENSOR WAS RE-SECURED.  ALL OPERATIONAL CHECKS WERE GOOD.

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