A CRJ200 EICAS alerted anti-ice duct message at cruise. After completing the QRH the cabin began de-...

Attributes
ACN	936476
Time
Date	201011
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	Regional Jet 200 ER/LR (CRJ200)
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Pneumatic Valve/Bleed Valve
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 240 Flight Crew Total 8448 Flight Crew Type 5070
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy

Narrative:

Climbing through FL270 received the 'anti-ice duct' warning message. First officer (flying pilot) was flying and took the radios. Captain performed the QRH for 'anti-ice duct' and deselected the 14th stage valves. Flight attendant called and said she herd a 'whoose' noise in back of the aircraft. 'Anti ice duct' message went away once QRH was complete. Contacted dispatch to work on an suitable airport to land at. First officer noticed the cabin pressurization started to climb. At some time the 10th stage valves were deselected (not sure why) and that caused the de-pressurization. We performed emergency descent QRH and first officer descended to 10;000ft and descended below icing conditions. Icing was forecast for our entire route. We requested a diversion. Complete QRH slowly and pay attention to details.

Original NASA ASRS Text

Title: A CRJ200 EICAS alerted ANTI-ICE DUCT message at cruise. After completing the QRH the cabin began de-pressurizing because the 10th stage bleed valve had been inadvertently closed along with the checklist prescribe 14th stage bleed. The crew diverted to a non icing airport.

Narrative: Climbing through FL270 received the 'Anti-Ice Duct' warning message. First Officer (Flying Pilot) was flying and took the radios. Captain performed the QRH for 'Anti-Ice Duct' and deselected the 14th stage valves. Flight Attendant called and said she herd a 'whoose' noise in back of the aircraft. 'Anti Ice Duct' message went away once QRH was complete. Contacted dispatch to work on an suitable airport to land at. First Officer noticed the cabin pressurization started to climb. At some time the 10th stage valves were deselected (not sure why) and that caused the de-pressurization. We performed emergency descent QRH and First Officer descended to 10;000ft and descended below icing conditions. Icing was forecast for our entire route. We requested a diversion. Complete QRH slowly and pay attention to details.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

A CRJ200 EICAS alerted anti-ice duct message at cruise. After completing the QRH the cabin began de-pressurizing because the 10th stage bleed valve had been inadvertently closed along with the checklist prescribe 14th stage bleed. The crew diverted to a non icing airport.