EMB145 flight crew reports cabin pressurization failure at FL260 and emergency descent.

Attributes
ACN	794987
Time
Date	200807
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zzz.artcc
State Reference	US
Altitude	msl bound lower : 10000 msl bound upper : 26000
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 145 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	794987
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
ASRS Report	794988
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : cabin alert other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : declared emergency
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

While cruising at 26000 ft the cabin lost pressurization. We performed checklist notified ATC; and flight attendant; and began an emergency descent to 10000 ft. Noticed cabin altitude was 8200 ft and climbing rapidly then the red cabin alert went off. Supplemental information from acn 794988: in level cruise at 26000 ft. Normal cruise confign. Pilots noticed cabin altitude started rapidly climbing and triggered 10000 ft alarm. Crew put on oxygen masks; declared emergency and descended to 10000 ft with ATC clearance. Completed required checklists; briefed company; passenger; and flight attendant. Landed successfully at ZZZ and taxied to gate.

Original NASA ASRS Text

Title: EMB145 FLT CREW REPORTS CABIN PRESSURIZATION FAILURE AT FL260 AND EMERGENCY DESCENT.

Narrative: WHILE CRUISING AT 26000 FT THE CABIN LOST PRESSURIZATION. WE PERFORMED CHKLIST NOTIFIED ATC; AND FLT ATTENDANT; AND BEGAN AN EMER DSCNT TO 10000 FT. NOTICED CABIN ALT WAS 8200 FT AND CLBING RAPIDLY THEN THE RED CABIN ALERT WENT OFF. SUPPLEMENTAL INFO FROM ACN 794988: IN LEVEL CRUISE AT 26000 FT. NORMAL CRUISE CONFIGN. PLTS NOTICED CABIN ALT STARTED RAPIDLY CLBING AND TRIGGERED 10000 FT ALARM. CREW PUT ON OXYGEN MASKS; DECLARED EMER AND DSNDED TO 10000 FT WITH ATC CLRNC. COMPLETED REQUIRED CHKLISTS; BRIEFED COMPANY; PAX; AND FLT ATTENDANT. LANDED SUCCESSFULLY AT ZZZ AND TAXIED TO GATE.

Data retrieved from NASA's ASRS site as of May 2009 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.