Crj-700 flight crew reported diverting to an alternate after loss of cabin pressure related to a pac...

Attributes
ACN	1406415
Time
Date	201612
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Regional Jet 700 ER/LR (CRJ700)
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Air Conditioning and Pressurization Pack
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

While in cruise flight at FL410 [we] received left pack temperature EICAS caution message. Reduced outflow temperature from 77 to 35 degrees and caution message remained. Received a bleed duct warning message. Started running QRH procedures for warning. Crew donned oxygen masks and established crew communications. [Advised] ATC and initiated an emergency descent to 10;000 feet. During descent; cabin pressure altitude increased to approximately 15;000 feet and passenger oxygen masks were automatically deployed. Leveled off at 10;000 feet. Completed all emergency and abnormal checklists. Sent ACARS message to dispatcher listing events and plan. Diverted to [an alternate]. Flight attendants reported no undue reaction from any of the passengers. Requested emts to meet us at the gate. No passenger(s) requested medical attention and all the passengers were rebooked on the next flight.

Original NASA ASRS Text

Title: CRJ-700 flight crew reported diverting to an alternate after loss of cabin pressure related to a pack overheat and bleed duct leak messages.

Narrative: While in cruise flight at FL410 [we] received L PACK TEMP EICAS caution message. Reduced outflow temperature from 77 to 35 degrees and caution message remained. Received a BLEED DUCT warning message. Started running QRH procedures for warning. Crew donned oxygen masks and established crew communications. [Advised] ATC and initiated an emergency descent to 10;000 feet. During descent; cabin pressure altitude increased to approximately 15;000 feet and passenger oxygen masks were automatically deployed. Leveled off at 10;000 feet. Completed all emergency and abnormal checklists. Sent ACARS message to Dispatcher listing events and plan. Diverted to [an alternate]. Flight Attendants reported no undue reaction from any of the passengers. Requested EMTs to meet us at the gate. No passenger(s) requested medical attention and all the passengers were rebooked on the next flight.

Data retrieved from NASA's ASRS site 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.

Crj-700 flight crew reported diverting to an alternate after loss of cabin pressure related to a pack overheat and bleed duct leak messages.