# SDR FDEA2020043090840

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 29, 2020
- Submitted: April 30, 2020
- Operation: Air carrier
- Aircraft: [N321FE](https://openairdocs.org/aircraft/N321FE), registered now
- Make and model: Doug MD-10-30F
- Registry model: [Doug MD-10-30F](https://openairdocs.org/model/mcdonnell-douglas-md-10-30f) (OpenAirDocs)
- Aircraft serial: 47836
- Aircraft time: 102,976 hours, 31,863 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Part number: HG2080AC01
- Part serial: 56021699
- Condition: Failed
- Location: Nr 1
- Stage of operation: CR
- How discovered: O
- Nature of condition: G, J, S
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA2020043090840

## Discrepancy

AT FL340 GOT IAS DISPLAYED ON PFD'S AS WELL AS WSHEAR DET FAIL SEL ELEV FEEL MAN   AND SEL FLAP LIMIT OVED DISPLAY. COMPLIED WITH AIRSPEED UNRELIABLE CHECKLIST IN   QRH. IT APPEARED CAPTAINS AIRSPEED WAS IN ERROR. TRIED TO SELECT AUX CADC.  THIS DID NO FIX IT. ENDED UP WITH CAPT ON CADC 2.   REMOVED AND REPLACED 1. OPS CHECK NORMAL.  PURGE CAPT AND AUX PITOT STATIC   LINES. PREFORMED AUTO LAND LLM RTS ON BOTH FCC 1&2 TEST PASSED

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