# SDR CHQA20140328097

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 28, 2014
- Submitted: April 1, 2014
- Operation: Air carrier
- Aircraft: N576RP
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 14500856
- Aircraft time: 21,333 hours, 18,895 cycles
- Engine: Rroyce AE3007A1P
- Engine time: 27,121 hours, 25,010 cycles
- System (JASC): [3420 · Attitude and Direction Data System](https://openairdocs.org/jasc/3420)
- Part: Indicator
- Part number: C16221GD04
- Part serial: C16221000290
- Condition: Tumbles
- Location: Standby Nav Sys
- Part time: 23,553 hours, 19,254 cycles
- Stage of operation: CL
- 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/CHQA20140328097

## Discrepancy

CREW REPORTED THAT THE ISIS ATTITUDE INDICATOR TUMBLED IN FLIGHT.  THE ACFT RETURNED TO FIELD & LANDED WITHOUT INCIDENT.  DEFERRED THE ISIS, THE DEFERRAL WAS CLEARED THAT EVENING BEFORE THE ACFT RESUMED FLIGHT BY REPLACING THE ISIS.  OPERATIONAL CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED.

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