# SDR P5CA2015050500037

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 5, 2015
- Submitted: May 6, 2015
- Operation: Air carrier
- Aircraft: [N454PA](https://openairdocs.org/aircraft/N454PA), registered now
- Make and model: Boeing 747-46NF
- Registry model: [Boeing 747-46NF](https://openairdocs.org/model/boeing-747-46nf) (OpenAirDocs)
- Aircraft serial: 30812
- Aircraft time: 56,530 hours, 9,192 cycles
- System (JASC): [3412 · Outside Air Temperature Indicator/Sensor](https://openairdocs.org/jasc/3412)
- Part: Indication Sys
- Condition: Malfunctioned
- Stage of operation: DE
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/P5CA2015050500037

## Discrepancy

DURING DECENT FROM FL200, F/O VERTICAL DEVIATION INDICATOR SHOWED 4300 FT LOW WHILE CAPTAIN`S VDI SHOWED 600 FT HIGH.  BOTH MARRIED UP WITH SAME INDICATION AT 140000 FEET, COMPLIED WITH AMM 34-12-00. BOTH CAPTAIN'S AND F/O`S ADC CHECKED GOOD.

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