# SDR ASAA2018091926178

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 15, 2018
- Submitted: September 19, 2018
- Operation: Air carrier
- Aircraft: N306AS
- Make and model: Boeing 737990
- Aircraft serial: 30014
- Aircraft time: 60,915 hours, 24,035 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Not Reported
- Condition: Malfunctioned
- Location: Ac Bay
- Stage of operation: TO
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018091926178

## Discrepancy

WITH ONE PACK MEL'D ON TAKE OFF FRON SLC, RT PACK MADE 3 PSI DIFFERENTIAL PRESSURE UP TO 10,000 MSL THAN THE DIFF PRESSURE REDUCED TO 0 PSI AND THE CABIN CLIMBED TO 10,000 FEET RETURNED TO SLC AFTER REFERENCING QRH. GROUNDED - YES. ON DEFERRAL.

---
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.