# SDR DALA2025021001048

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 7, 2025
- Submitted: February 10, 2025
- Operation: Air carrier
- Aircraft: [N174DN](https://openairdocs.org/aircraft/N174DN), registered now
- Make and model: Boeing 767332
- Aircraft serial: 24802
- Aircraft time: 146,789 hours, 21,751 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Condition: Faulted
- Location: Right
- Stage of operation: DE
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2025021001048

## Discrepancy

SHIP 174 -RVSM- DURING FLIGHT ALTITUDE DISAGREE EICAS MESSAGE AND CAUTION. QRH PROCEDURE APPLIED, CA/STBY/FO ALTIMETERS INDICATED 31240/31500/ 31000 WHILE DESCENDING THROUGH FL310. CORRECTIVE ACTION: R/R RT ADC PER B767AMM 3412 OPS TEAT GOOD. (6378263)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.