# SDR HALA2017092100247

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 21, 2017
- Submitted: September 26, 2017
- Operation: Air carrier
- Aircraft: [N583HA](https://openairdocs.org/aircraft/N583HA), registered now
- Make and model: Boeing 767-33A
- Registry model: [Boeing 767-33A](https://openairdocs.org/model/boeing-767-33a) (OpenAirDocs)
- Aircraft serial: 25531
- Aircraft time: 104,350 hours, 18,751 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Part number: 4040800912
- Part serial: 86010786
- Condition: Faulty
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HALA2017092100247

## Discrepancy

AT FL 340 CA/FO ALTIMETERS 135 FT DIFFERENCE MAX ALLOWABLE DIFFF 135 FT.  REPLACED R ADC. GND OPS CHECK OK.

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