# SDR ASAA2023062543668

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 25, 2023
- Submitted: June 27, 2023
- Operation: Air carrier
- Aircraft: [N506AS](https://openairdocs.org/aircraft/N506AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35690
- Aircraft time: 53,959 hours, 16,310 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Modulating Valve
- Part number: 3989083
- Part serial: 2715
- Condition: Faulty
- Location: Right Ecs Bay
- Part time: 78,244 hours, 38,022 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023062543668

## Discrepancy

R/H PACK LIGHT ILLUMINATED ON GROUND, PACKS OFF. GROUNDED - YES. BITE CHECK FLAGS RH PACK TCV. REMOVED & REPLACED RH TCV REF B737-800 AMM 21-51-10. OPS CHECK & LEAK CHECK GOOD.

---
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.