# SDR 2013FA0000150

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 6, 2013
- Submitted: March 6, 2013
- Operation: General aviation
- Aircraft: [N92DV](https://openairdocs.org/aircraft/N92DV), registered now
- Make and model: Beech E-90
- Registry model: [Beech E-90](https://openairdocs.org/model/beech-e-90) (OpenAirDocs)
- Aircraft serial: LW292
- Aircraft time: 14,608 hours, 19,844 cycles
- System (JASC): [2562 · Emergency Locator Beacon](https://openairdocs.org/jasc/2562)
- Part: G Switch
- Condition: Misinstalled
- Location: Elt
- Stage of operation: IN
- How discovered: 9
- Nature of condition: W
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2013FA0000150

## Discrepancy

WHILE PERFORMING THE ANNUAL ELT INSPECTION, THE ELT WOULD NOT SIGNAL DURING THE "SHAKE" TEST.  THE COVER WAS REMOVED FOR A VISUAL INSPECTION.  THE G-SWITCH WAS INSTALLED BACKWARD.  ALL INDICATIONS WITH A MAGNIFYING GLASS APPEAR THIS TO BE A FACTORY INSTALL, NOT A REPAIR OR REPLACED SWITCH. (APPEARS ORIGINAL GLUE AND SOLDER ON G-SWITCH APPEAR INTACT.) IT IS VERY CLEAR THE ARROW ON THE COVER POINTS FWD, AND THE ARROW FOR "ACCELLERATE" POINTS AFT.  I DO NOT BELIEVE THE BACKWARDS SWITCH CAUSED THE FAILURE, AS THE UNIT WAS SHAKEN IN BOTH DIRECTIONS TO ATTEMPT TO TRIGGER.  I ALSO BELIEVE PAST "SHAKE TESTS" MAY NOT HAVE DISCLOSED THE REVERSED SWITCH, AS WHEN YOU SHAKE THE UNIT IN THE IMPACT DIRECTION, THE "BACK-STROKE" IS ENOUGH TO TRIGGER AN ELT.  I WILL RETAIN THE UNIT IF FURTHER INSPECTION IS REQUIRED BY THE FAA OR MFG.

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