# SDR ASAA2017091921985

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 19, 2017
- Submitted: September 20, 2017
- Operation: Air carrier
- Aircraft: [N407AS](https://openairdocs.org/aircraft/N407AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41731
- Aircraft time: 19,230 hours, 6,217 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Regulator
- Part number: 1074926
- Part serial: 15093
- Condition: Failed
- Location: Bleed Air Sys
- Part time: 19,228 hours, 6,216 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017091921985

## Discrepancy

DURING TAXI LEFT DUCT PRESS INDICATES ZERO. GROUNDED - YES. REPLACED BAR PER AMM 36-11-03 AND PRSOV PER AMM 36-11-04. REPAIR CONFIRMATION SUCCESSFUL PER FIM 36-10 TASK 805. GROUND VERIFICATION SUCCESSFUL.

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