# SDR ASAA2014101309370

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 13, 2014
- Submitted: October 17, 2014
- Operation: Air carrier
- Aircraft: [N560AS](https://openairdocs.org/aircraft/N560AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35179
- Aircraft time: 31,315 hours, 9,564 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3966081
- Part serial: 2445
- Condition: Failed
- Location: Lt A/C Pack
- Part time: 31,323 hours, 9,570 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2014101309370

## Discrepancy

CREW REPORTS N1 TARGET SPLIT ON FMS TAKEOFF PAGE.  NOTED FMCS BITE DISCRETES SHOW NR 1 ENGINE BLEED VALVE "ON" IN BOTH IN BOTH POSITIONS.  AFTER OPERATING PACKS FOUND LT ECS SHOWS ON ALL THE TIME, PACK ON OR OFF.  ACFT GROUNDED. R & R LT FLOW CONTROL VALVE, REF AMM 21-51-01. DURING LEAK CHECK FOUND HOLE IN HOSE BETWEEN ACM AND TURBINE OUTLET MUFF MIXING DUCT.  REPLACED HOSE LEAK CHECK GOOD, BITE 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.