# SDR BJNA991201

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 11, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N789TM
- Make and model: Boeing 737282
- Aircraft serial: 23046
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: CR
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/BJNA991201

## Discrepancy

DURING CRUISE, SEVERAL ABNORMAL INDICATIONS OCCURRED, AS FOLLOWS, NR 1 ALTIMETER WITH OFF FLAGS AND SPINNING, MACH TRIM FAIL LIGHT, NR 1 AIRSPEED WITH FLAGS WITH BARBER POLE REDUCED TO 260 KNOTS, GROUND PROX INOPERATIVE, EPR INOPERATIVE, AND PDC WENT INTO TEST MODE.  RE-RACKED AIR DATA COMPUTER PER 34-12-0.  OPERATION OF EFFECTED SYSTEM CHECK OK.  (M)

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