# SDR CALA2013112193147

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 21, 2013
- Submitted: November 22, 2013
- Operation: Air carrier
- Aircraft: [N662UA](https://openairdocs.org/aircraft/N662UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 27159
- Aircraft time: 88,529 hours, 13,996 cycles
- Engine: Pwa PW4060
- System (JASC): [3620 · Pneumatic Indicating System](https://openairdocs.org/jasc/3620)
- Part: Transmitter
- Condition: Faulty
- Location: Bleed Air Sys
- Stage of operation: IN
- 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/CALA2013112193147

## Discrepancy

DUCT PRESS SPLIT.  DURING POWER RUNS USING ASM BLEED MONITORING SOFTWARE, FOUND PRESS OUT OF PRESS RELIEF VLV WAS NORMAL & MATCHED THE LT SIDE AT ALL POWER SETTINGS BUT EICAS INDICATION WAS READING 20-30 PSI LOW COMPARED TO THE ACTUAL PRESS RELIEF VLV OUTPUT PRESS.  REPLACE THE RT DUCT PRESS TRANSMITTER M1089.

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