# SDR DL73S030794

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 29, 2003
- Submitted: October 6, 2003
- Operation: Air carrier
- Aircraft: N382DL
- Make and model: Boeing 737247
- Aircraft serial: 23609
- Aircraft time: 43,711 hours, 33,020 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Part number: HG480B42
- Part serial: H1151
- Condition: Failed
- Location: E/E Bay
- Stage of operation: TO
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DL73S030794

## Discrepancy

ON T/O LOST BOTH CAPT AND F/O AIRSPEED AND ALTIMETER.  CAPTS FROZE, NO FLAGS.  F/O HAD FLAGS IN VIEW.  FOUND HOSES OFF NR 1 ADC.  RECONNECTED HOSES, BOTH WERE SECURE.  PERFORMED TEST ON ADC CHECKS OK.  F/O ADC HAD FAILED.  REPLACED SAME, TEST OK.

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