# SDR AALA20171201001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 30, 2017
- Submitted: December 8, 2017
- Operation: Air carrier
- Aircraft: [N866NN](https://openairdocs.org/aircraft/N866NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 40584
- Aircraft time: 22,356 hours, 8,927 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Regulator
- Part number: 1074926
- Part serial: 12594
- Condition: Faulty
- Location: Bleed Air Sys
- Part time: 32,095 hours, 13,274 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20171201001

## Discrepancy

AIRCRAFT WAS GROUNDED.  EMERGENCY DECLARED.  MIA-GYE FLIGHT RETURNED TO MIA ACCOUNT AIRFLOW EXCESSIVE AND CABIN TEMPERATURE STUCK ON FULL COLD.  OVERWEIGHT LANDING UNEVENTFUL. REMOVED AND REPLACED LEFT ENGINE BLEED AIR REGULATOR PER AMM 36-11-03 AND LEFT ENGINE PRESSURE REGULATOR AND SHUTOFF VALVE PER AMM 36-11-04 (AALA201712079031).  OPERATIONAL CHECK GOOD.

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