# SDR EIAA20111012238

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 12, 2011
- Submitted: October 18, 2011
- Operation: Air carrier
- Aircraft: N486EV
- Make and model: Boeing 747 212B
- Registry model: [Boeing 747 212B](https://openairdocs.org/model/boeing-747-212b) (OpenAirDocs)
- Aircraft serial: 20888
- Aircraft time: 99,470 hours
- System (JASC): [3110 · Instrument Panel](https://openairdocs.org/jasc/3110)
- Part: Cadc
- Part number: 37571832A
- Part serial: 71921397
- Condition: Failed
- Stage of operation: CL
- How discovered: V
- Nature of condition: S
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/EIAA20111012238

## Discrepancy

FIRST OFFICER SAT GAGE, ALTIMETER, MACH IND, FLIGHT DIRECTOR & AIRSPEED INOPERATIVE WITH ALTITUDE ALERT LIGHT ON. AUTO PILOT B INOPERATIVE, TRANSPONDER NR 2 ATC FAIL, F/O FMS HAS ADC INPUT FAIL.   FOUND CADC RACK CONNECTORS DB0164 B, CHD DETERIORATED AND BURNED.  REPLACED SAME REF SWPM 20-63-00 WDM 34-12-22 ML 91-21-51 SYSTEMS NOW OPS CK NORMAL REF MM 34-12-00. ACCOM LEAK TEST AND FOUND OK REF MM-34-11-00. REPLACED CADC REF MM 34-12-01. PITOT STATIC TEST EQUIPMENT REMOVED.

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