# SDR FDEA201403290603

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 29, 2014
- Submitted: April 1, 2014
- Operation: Air carrier
- Aircraft: [N316FE](https://openairdocs.org/aircraft/N316FE), 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: 48314
- Aircraft time: 54,248 hours, 18,846 cycles
- System (JASC): [3416 · Altimeter, Barometric/Encoder](https://openairdocs.org/jasc/3416)
- Part: Adiru
- Part number: HG2080AC01
- Part serial: 56006341
- Condition: Inoperative
- Location: Nr 2
- Part time: 78,058 hours, 26,440 cycles
- 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/FDEA201403290603

## Discrepancy

DURING CRUISE, IAS MISCOMPARE ALERT CAME ON BOTH CAP & FO`S PFD.  AIRSPEED MISCOMPARE STARTED AT 4 KTS THEN WENT TO APPROX 50 KTS MISCOMPARE BETWEEN BOTH PFD'S, FOLLOWED BY AUTO THROTTLES DISENGAGED,  AUTOPILOT DISENGAGED & FLIGHT DIRECTOR DISAPPEARED.  ALTITUDE MISCOMPARE BY 450', SEL ELEV FEEL MAN, SEL  FLAP LIM OVERRIDE.  AFTER TROUBLESHOOTING SYS IAW QRH, DECIDED THAT CADC 2 WAS BAD & USED QRH TO TRANSFER BOTH DISPLAYS TO CADC 1, FD1 & AP2.  ALL  SYS ON CADC 1 CAME BACK, NO ASSOCIATED PROBLEMS.   INSPECTED ALL PITOT & STATIC PORTS. NO BLOCKAGE  FOUND. CHECKED & ENSURED ALL AIR DATA MODULE  CONNECTIONS WERE SECURED IAW AMM 34-16-01-4. REPLACED NR 2 ADIRU IAW AMM 34-43-03-4, CHECKED SATISFACTORY.

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