# SDR QMLA2012061712100

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 17, 2012
- Submitted: June 18, 2012
- Operation: Air carrier
- Aircraft: N396LG
- Make and model: Snias AS350B3
- Aircraft serial: 3336
- Aircraft time: 6,461 hours, 30,456 cycles
- System (JASC): [3497 · Navigation System Wiring](https://openairdocs.org/jasc/3497)
- Part: Diode
- Part number: 1N4007
- Condition: Burned
- Location: Clock
- Stage of operation: NR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: H, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QMLA2012061712100

## Discrepancy

DETECTED AND SAW SMOKE IN COCKPIT.  SMOKE OBSERVED COMING FROM LOWER RT SIDE OF INSTRUMENT PANEL.  TURNED OFF BATTERY SWITCH.  DIVERTED FOR UNEVENTFULL UNSCHEDULED LANDING.   DETERMINED THAT A DIODE TO THE ACFT CLOCK BACK LIGHTING SYS HAD OVERHEATED ANF MELTED ITSELF AND A TY-WRAP THAT SECURED THE WIRE HARNESS TO A STANDOFF ASSY.  DISABLED CLOCK BACK LIGHTING SYS AND DEFFERED.

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