# SDR ASAA2021090335847

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 3, 2021
- Submitted: September 22, 2021
- Operation: Air carrier
- Aircraft: [N588AS](https://openairdocs.org/aircraft/N588AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35685
- Aircraft time: 49,136 hours, 14,619 cycles
- System (JASC): [2170 · Humidity Control System](https://openairdocs.org/jasc/2170)
- Part: Extractor
- Part number: 2340061
- Part serial: 7859
- Condition: Faulted
- Location: Lt Ecs
- Part time: 55 hours, 22 cycles
- Stage of operation: TX
- How discovered: V
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021090335847

## Discrepancy

UPON USING APU BLEED AIR, THE FLIGHT DECK WAS INUNDATED WITH ICE PELLETS AND AIR COMING THROUGH THE VENTS AT APPROX 5-10X NORMAL VOLUME AFTER TWO CYCLES WE TURNED OFF APU BLEED AIR AND CALLED MX. GROUNDED - YES. REMOVED AND REPLACED 2 EACH WATER EXTRACTOR ON L/H AIR COND PACK OPS AND LEAK CHECK GOOD, NO ICE PELLETS NOTED IN COCKPIT REF B737-800 AMM 21-51-40-00-801.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.