# SDR CA031204001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 21, 2003
- Submitted: January 5, 2004
- Operation: General aviation
- Make and model: Doug DC-9-83
- Registry model: [Doug DC-9-83](https://openairdocs.org/model/douglas-dc-9-83) (OpenAirDocs)
- Aircraft time: 13,282 hours
- Engine: Pwa JT8D219
- System (JASC): [3425 · Integrated Flight System](https://openairdocs.org/jasc/3425)
- Part: Symbol Generator
- Condition: Failed
- Location: Flt Computer
- Stage of operation: DE
- 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/CA031204001

## Discrepancy

(CAN) CAPTAIN EADI AND EHSI WENT BLANK TWICE DURING  DESCENT AND APPROACH. EACH TIME THEY STAYED OFF FOR ABOUT 5-10 SECONDS, THEN CAME BACK ON. SYMBOL GENERATOR NR 1 SWAPPED WITH NR 2 AND COULD NOT DUPLICATE SNAG ON GROUND. AIRCRAFT DISPATCHED SERVICEABLE. SUSPECT PROBLEM RELATED WITH BAD VENTILATION. FOUND HSI AND ADI SCREEN PACKED WITH DUST.

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