# SDR CA131128006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 24, 2013
- Submitted: September 14, 2015
- Operation: General aviation
- Make and model: Beech 1900D
- Registry model: [Beech 1900D](https://openairdocs.org/model/beech-1900d) (OpenAirDocs)
- Aircraft time: 31,096 hours
- Engine: Pwa PT6A67D
- System (JASC): [5340 · Fuselage Main, Attach Fittings](https://openairdocs.org/jasc/5340)
- Part: Bolt
- Condition: Loose
- Location: A/C Inverter
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA131128006

## Discrepancy

(CAN) CREW REPORTED FLICKERING EADI & EHSI, ALTERNATING, ON BOTH THE CAPTAIN`S & CO-PILOT`S SIDE.  IN CONJUNCTION WITH THIS A LOUD NOISE WAS ALSO EVIDENT OVER THE COCKPIT AND CABIN SPEAKERS AS WELL AS THE CREW HEADSETS.  TROUBLESHOOTING WAS CARRIED OUT & THE NR 1 & NR 2 INVERTERS 26VAC TRANSFORMER GROUND TO LOWER RT JUNCTION BOX MOUNTING BOLT WAS FOUND LOOSE.  MAINTENANCE RE-SECURED THE MOUNTING BOLT AND THE SYSTEM WAS FUNCTION CHECKED SERVICEABLE.  ACFT WAS RETURNED TO SERVICE. REF WMD 129-340016, SHEET 4.

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