# SDR CA021202003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 17, 2002
- Submitted: January 6, 2003
- Operation: Air carrier
- Make and model: Cessna 441
- Registry model: [Cessna 441](https://openairdocs.org/model/cessna-441) (OpenAirDocs)
- System (JASC): [3451 · DME/TACAN System](https://openairdocs.org/jasc/3451)
- Part: Transponder
- Part number: 6221233001
- Condition: Failed
- Location: Cockpit
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA021202003

## Discrepancy

(CAN) INTERMITTENT FAILURE,  DISPLAY UNITS WOULD GIVE ----- OR 8888 INSTEAD OF CORRECT SPEED OR DISTANCE DISPLAY.  NOTE: 2 CAUSES WERE FOUND: (1) INTERMITTENT FAILURE OF IL IN THE DME 40 UNIT. (2) GNS 530 CHANNELING WAS INCORRECTLY PROGRAMED CAUSING THE DME NOT TO FUNCTION ON SOME CHANNELS.

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