# SDR ASAA2023052543362

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 25, 2023
- Submitted: May 26, 2023
- Operation: Air carrier
- Aircraft: [N408AS](https://openairdocs.org/aircraft/N408AS), registered now
- Make and model: Boeing 737-900ER
- Registry model: [Boeing 737-900ER](https://openairdocs.org/model/boeing-737-900er) (OpenAirDocs)
- Aircraft serial: 41732
- Aircraft time: 38,413 hours, 12,145 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Sense Line
- Part number: 332A235011
- Condition: Broken
- Location: #1 Engine
- Stage of operation: TX
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023052543362

## Discrepancy

AFTER ENGINE START LEFT BLEED AIR DUCT PRESSURE INDICATES 8 PSI, RIGHT BLEED AIR DUCT INDICATES 19 PSI WITH ENGINE POWER AT IDLE, A/C PACKS IN AUTO, AND ENGINE ANTI ICE OFF. GROUNDED - YES. FOUND CONTROL PRESSURE SENSE LINE FROM THE HIGH STAGE REGULATOR BROKEN. REPLACED SENSE LINE IAW B737-900 AMM 36-11-06-400-801 STEP F (8) (A)-(D).

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