# SDR AALA202105179022

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 14, 2021
- Submitted: May 17, 2021
- Operation: Air carrier
- Aircraft: [N123NN](https://openairdocs.org/aircraft/N123NN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6256
- Aircraft time: 21,815 hours, 6,216 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Hose
- Condition: Faulted
- Location: Adc
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202105179022

## Discrepancy

AIRCRAFT WAS GROUNDED: CAPTAIN AND FIRST OFFICER ALTIMETR DIFFER 180FT CAUSING AH ALERT WARNING DURING FLIGHT AT CRUISE. AIRSPEED INDICATION BETWEEN CAPTAIN AND FIRST OFFICER, AIRSPEED TAPE DIFFER PLUS 5#S/.010 MACH. FLIGHT DIRECTOR COMMAND BARS DIFFER 2.5 DEGREES PITCH BETWEEN CAPTAIN AND FIRST OFFICER. REPLACED CAPTAINS RIGHT AIR DATA MODULE (AALA202105179018) AND FLEX HOSE (AALA202105179022) IAW AMM 34-13-00.

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