# SDR ASAA2021053034973

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 30, 2021
- Submitted: June 1, 2021
- Operation: Air carrier
- Aircraft: [N477AS](https://openairdocs.org/aircraft/N477AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40716
- Aircraft time: 21,228 hours, 6,671 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Regulator
- Part number: 1074847
- Part serial: 1795C
- Condition: Failed
- Location: Nr 2 Engine
- Part time: 50,996 hours, 20,518 cycles
- Stage of operation: IN
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021053034973

## Discrepancy

FOLLOW-UP TO REPORT OF RIGHT BLEED TRIP IN FLIGHT, ACCOMPLISH RIGHT ENGINE PNEUMATIC SYSTEM HEALTH CHECK PER TASK CARD NG-36WC-00002-2 GROUNDED - YES. ACCOMPLISHED T/C NG-36WC-00002-2 THROUGH STEP 4L FOUND HSR BAD. REMOVED AND REPLACED HSR REF B737-800 AMM 36-11-07-400. COMPLETED T/C NG 36-WC-00002-2 PERFORMED CROSS OVER CHECK REF AMM 36-11-00-710 NO DEFECTS NOTED.

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