# SDR CA150430003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 27, 2015
- Submitted: August 5, 2015
- Operation: General aviation
- System (JASC): [3160 · Central Display](https://openairdocs.org/jasc/3160)
- Part: Display
- Part number: 100601951503
- Condition: Failed
- Location: Fmc
- Part time: 1,777 hours
- 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/CA150430003

## Discrepancy

(CAN) CMC ELECTRONICS RECEIVED DEFECTIVE CMA-9000 FLIGHT MANAGEMENT SYSTEM, PN 100-601951-503, SN 1087.  RETURNED FOR REPAIR. THE FAILURE MODE REPORTED, "BLANK DISPLAY WHEN SWITCH ON, SN-1087.  THE MAINTENANCE TECHNICIAN AT CMC CONFIRMED THE REPORTED FAILURE.  THE CAUSE OF FAILURE WAS ASSIGNABLE TO A DEFECTIVE COMPONENT U45 (DC/DC) LOCATED ON THE FRONT END POWER SUPPLY ASSY.  HOWEVER, DURING INSPECTION IT WAS OBSERVED THAT A THERMAL PAD NORMALLY INSTALLED ON THAT COMPONENT USED TO DISSIPATE HEAT WAS MISSING.  THIS MATERIAL WAS NOT INSTALLED DURING THE ORIGINAL MFG OF THE EQUIPMENT.  CMC HAS INITIATED A ROOT CAUSE ANALYSIS AND WILL TAKE CORRECTIVE ACTION AS DEEMED NECESSARY.

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