# SDR CHQA200800025

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 6, 2008
- Submitted: February 8, 2008
- Operation: Air carrier
- Aircraft: N292SK
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 145488
- Aircraft time: 16,554 hours, 15,015 cycles
- Engine: Allsn AE3007A
- Engine time: 16,812 hours, 14,870 cycles
- System (JASC): [3260 · Landing Gear Position and Warning](https://openairdocs.org/jasc/3260)
- Part: Proximity Switch
- Part number: 8005701
- Condition: Faulty
- Location: Lt Mlg
- 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/CHQA200800025

## Discrepancy

IAD TO GSO - AFTER TAKEOFF, WHEN THE CREW SELECTED THE LANDING GEAR UP, A LANDING GEAR AIR/GROUND FAIL MESSAGE WAS DISPLAYED ON EICAS AND THE LANDING GEAR WOULD NOT RETRACT.  THE CREW RETURNED TO FIELD AND LANDED WITHOUT INCIDENT AT IAD.  MAINTENANCE TROUBLESHOT THE AIR/GROUND SYSTEM AND FOUND THE LEFT MAIN LANDING GEAR WEIGHT-ON-WHEELS PROX SWITCH FAULTY.  AFTER REPLACING THE PROX SWITCH, THE MESSAGE CLEARED AND THE AIR/GROUND SYSTEM AND LANDING GEAR OPERATED NORMALLY.

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