B757 crew had a loss of cabin pressurization in ZDV class a airspace.

Attributes
ACN	479522
Time
Date	200007
Day	Mon
Local Time Of Day	0601 To 1200
Place
State Reference	KS
Altitude	msl single value : 36500
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdv.artcc
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : vacating altitude
Route In Use	enroute airway : ns.airway
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 19000 flight time type : 1800
ASRS Report	479522
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : cabin altitude warning other flight crewa other flight crewb
Resolutory Action	controller : provided flight assist flight crew : declared emergency flight crew : diverted to another airport other
Consequence	other
Supplementary
Problem Areas	Aircraft Company Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

Lost cabin pressurization during climb to cruise altitude. Both engine bleed valves failed closed. Performed emergency descent and advised ATC. Returned to den at 10000 ft. Emergency declared beginning of descent. Oxygen masks knocked captain's headset and glasses off. 11 oxygen generators failed to activate leaving 27 passenger and 2 flight attendants without oxygen. Fortunately the cabin never got over 11000-12000 ft MSL.

Original NASA ASRS Text

Title: B757 CREW HAD A LOSS OF CABIN PRESSURIZATION IN ZDV CLASS A AIRSPACE.

Narrative: LOST CABIN PRESSURIZATION DURING CLB TO CRUISE ALT. BOTH ENG BLEED VALVES FAILED CLOSED. PERFORMED EMER DSCNT AND ADVISED ATC. RETURNED TO DEN AT 10000 FT. EMER DECLARED BEGINNING OF DSCNT. OXYGEN MASKS KNOCKED CAPT'S HEADSET AND GLASSES OFF. 11 OXYGEN GENERATORS FAILED TO ACTIVATE LEAVING 27 PAX AND 2 FLT ATTENDANTS WITHOUT OXYGEN. FORTUNATELY THE CABIN NEVER GOT OVER 11000-12000 FT MSL.

Data retrieved from NASA's ASRS site as of July 2007 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.