# SDR CHQA201000050

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 2, 2010
- Submitted: March 4, 2010
- Operation: Air carrier
- Aircraft: [N11526](https://openairdocs.org/aircraft/N11526), registered now
- Make and model: Emb EMB-135LR
- Registry model: [EMB EMB-135LR](https://openairdocs.org/model/embraer-emb-135lr) (OpenAirDocs)
- Aircraft serial: 145410
- Aircraft time: 17,149 hours, 14,674 cycles
- Engine: Allsn AE3007A
- Engine time: 13,527 hours, 12,740 cycles
- System (JASC): [3441 · Inertial Guidance System](https://openairdocs.org/jasc/3441)
- Part: Inu
- Part number: 7510100631
- Part serial: 00084614
- Condition: Inoperative
- Location: Nr 2
- Part time: 17,903 hours, 15,368 cycles
- Stage of operation: AP
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CHQA201000050

## Discrepancy

DURING DESCENT INTO BNA THE CREW REPORTED NAV 1 AND 2 BOTH FAILED AND THE RMU NAV 1 AND 2 BOXES INDICATED DASHES.  THE AIRCRAFT DIVERTED TO SDF WHERE IT LANDED WITHOUT INCIDENT.  MAINTENANCE REPLACED BOTH NAV 1 AND 2 UNITS WITH NO FURTHER DEFECTS NOTED.  (NAV COMPUTER NR 2 P/N:  7510100-631; S/N:  03087150; TSN:  12755; CSN:  9357).

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