# SDR UIEA2014101100488

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 11, 2014
- Submitted: October 13, 2014
- Operation: Air carrier
- Aircraft: [N492MC](https://openairdocs.org/aircraft/N492MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 29253
- Aircraft time: 69,028 hours, 12,000 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Part number: 4040800911
- Part serial: 32112619
- Condition: Malfunctioned
- Location: Right
- Stage of operation: NR
- How discovered: O
- Nature of condition: P
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2014101100488

## Discrepancy

FIRST OFFICER LOST AIRSPEED & ALTITUDE ON PFD.  SWITCHED TO LT ADC, RETURNED TO NORMAL, NO EICAS MSG.  RT ADC REPLACED & ALL SYS OPERATE NORMAL.  PITOT STATIC CHECK ACCOMPLISHED IAW MM & OK.  LOG PG 650212 & 650214.

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