# SDR UPS03541450

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 19, 2003
- Submitted: October 20, 2003
- Operation: Air carrier
- Aircraft: [N454UP](https://openairdocs.org/aircraft/N454UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 25475
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Condition: Faulty
- Location: E/E Bay
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS03541450

## Discrepancy

INSPECTION TYPE:N/A F/O'S AIRSPEED DIFFERS BY 20 KNOTS IN FLIGHT ALTERNATE ADC SELECTED CURES INDICATION PROBLEMS.  RT ADC SEEMS INACCURATE, ASSOCIATED MACH SPEED TRIM AND RUDDER RATIO EICAS MSGS DISPLAYED.  T/S SYSTEM AND REPLACED RIGHT ADC PER FIM 34-12-00 AND MM 34-12-01-4 ACCOMPLISHED MCD TEST 30 CURRENT FAULT REPORT.  NO FAULTS REPORTED ALL M MSG CLEARED PER MM 22-00-02/201.

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