# SDR SIMA20130903024

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 3, 2013
- Submitted: September 6, 2013
- Operation: Air carrier
- Aircraft: [N618AE](https://openairdocs.org/aircraft/N618AE), registered now
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 145097
- Aircraft time: 34,298 hours, 31,594 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Rmu
- Part number: 7013270965
- Part serial: 040844690204370
- Condition: Inoperative
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SIMA20130903024

## Discrepancy

CREW REPORTED AFTER TAKEOFF, RMU 1 DISPLAYED ALL DASHES EXCEPT COMM 1 WINDOW.   RMU 2 DISPLAYED ALL DASHES.  115 VAC BUSS OFF ILLUMINATED FOR APPROX 30 SECONDS AND THEN EXTINGUISHED.   DECLARED AN EMERGENCY AND RETURNED TO DEPARTURE.  LANDED WITHOUT INCIDENT.  ACFT REMOVED FROM SERVICE.  R & R RMU 1, OPERATES OK IAW AMM 23-81-01.   R & R RMU NR 2 OPERATES OK IAW AMM 23-81-01.  REPLACED SWITCH FOR THE ACFT POWER ELECTRICAL SYS IAW AMM 20-13-04.  OPS CHECKED GOOD IAW 24-20-00.  ACFT RETURNED TO SERVICE.

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