# SDR JJBA20121103003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 3, 2012
- Submitted: November 13, 2012
- Operation: Air carrier
- Aircraft: N366PH
- Make and model: Dhav DHC8202
- Aircraft serial: 524
- Aircraft time: 29,203 hours, 40,133 cycles
- System (JASC): [3454 · Visual Omnirange (VOR) System](https://openairdocs.org/jasc/3454)
- Part: Button
- Condition: Stuck
- Location: Transponder
- Stage of operation: CR
- 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/JJBA20121103003

## Discrepancy

DURING CRUISE,  CREW REPORTED THAT BOTH TRANSPONDERS WERE DISPLAYING A "DIAG" MESSAGE.  NEITHER TRANSPONDER WAS TRANSMITTING.  GROUND MX CREW DISCOVERED THE TRANSPONDER HEAD CONTROL HAD THE TEST BUTTON STUCK.  MX CLEANED THE BUTTON AND PERFORMED AND OPS CHECK WHICH PRODUCED SATISFACTORY RESULTS.

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