# SDR 9JLA2021093010342

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 23, 2021
- Submitted: September 30, 2021
- Operation: Air carrier
- Aircraft: N44CD
- Make and model: Cessna 560XL
- Registry model: [Cessna 560XL](https://openairdocs.org/model/cessna-560xl) (OpenAirDocs)
- Aircraft serial: 5605624
- Aircraft time: 5,544 hours, 4,703 cycles
- System (JASC): [3160 · Central Display](https://openairdocs.org/jasc/3160)
- Part: Computer
- Part number: 501189002
- Condition: Defective
- Location: Air Data
- Stage of operation: CR
- How discovered: 9
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9JLA2021093010342

## Discrepancy

THE FLIGHT CREW REPORTED, THE STANDBY ATTITUDE-AIRSPEED AND ALTITUDE MISSING RED X. THE MAINTENANCE VENDOR DETERMINED  THE FLIGHT GUIDANCE AIRDATA COMPUTER WAS AT FAULT. THE DEFECTIVE UNIT WAS REMOVED AND REPLACED WITH A REPAIRED UNIT. THE AIRCRAFT WAS THEN RETURNED TO SERVICE.

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