A B767-300 lost all pressurization, declared an emergency and made an overweight landing at an alter...

Attributes
ACN	437090
Time
Date	199905
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : rnc.airport
Altitude	msl single value : 33000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zoa.artcc
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : enroute altitude change
Route In Use	enroute other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : multi engine pilot : private pilot : student pilot : commercial pilot : cfi pilot : atp pilot : instrument
Experience	flight time last 90 days : 210 flight time total : 12500 flight time type : 2000
ASRS Report	437090
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : multi engine pilot : instrument
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : declared emergency flight crew : diverted to another airport
Consequence	other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

10 mins after leveloff at FL330, the copilot and I felt a sudden change in the cabin pressure. The cabin was climbing beyond the 2000 FPM index. There were no EICAS messages or warnings. We tried to control with automatic and manual pressurization modes with no effect. The emergency qrc procedures (emergency descent and loss of pressurization checklist) were performed and an emergency was declared. The 'cabin' master warning and aural horn sounded (cabin altitude warning). The cabin climbed to approximately 15000 ft and the passenger oxygen mask deployed. With a clearance back to rno we notified company maintenance and dispatch. The crew had reported ill passenger and ourselves had sore ears and throat due to sudden psi change. After checking performance data we made ILS runway 16R approach in VFR WX. Landing was overweight at 333000 pounds -- limit is 320000 pounds. We used the hot brake procedure when parked. The aircraft had a reported problem prior to this and was in maintenance 3 days after, trying to find cause of problem.

Original NASA ASRS Text

Title: A B767-300 LOST ALL PRESSURIZATION, DECLARED AN EMER AND MADE AN OVERWT LNDG AT AN ALTERNATE ARPT.

Narrative: 10 MINS AFTER LEVELOFF AT FL330, THE COPLT AND I FELT A SUDDEN CHANGE IN THE CABIN PRESSURE. THE CABIN WAS CLBING BEYOND THE 2000 FPM INDEX. THERE WERE NO EICAS MESSAGES OR WARNINGS. WE TRIED TO CTL WITH AUTO AND MANUAL PRESSURIZATION MODES WITH NO EFFECT. THE EMER QRC PROCS (EMER DSCNT AND LOSS OF PRESSURIZATION CHKLIST) WERE PERFORMED AND AN EMER WAS DECLARED. THE 'CABIN' MASTER WARNING AND AURAL HORN SOUNDED (CABIN ALT WARNING). THE CABIN CLBED TO APPROX 15000 FT AND THE PAX OXYGEN MASK DEPLOYED. WITH A CLRNC BACK TO RNO WE NOTIFIED COMPANY MAINT AND DISPATCH. THE CREW HAD RPTED ILL PAX AND OURSELVES HAD SORE EARS AND THROAT DUE TO SUDDEN PSI CHANGE. AFTER CHKING PERFORMANCE DATA WE MADE ILS RWY 16R APCH IN VFR WX. LNDG WAS OVERWT AT 333000 LBS -- LIMIT IS 320000 LBS. WE USED THE HOT BRAKE PROC WHEN PARKED. THE ACFT HAD A RPTED PROB PRIOR TO THIS AND WAS IN MAINT 3 DAYS AFTER, TRYING TO FIND CAUSE OF PROB.

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.

A B767-300 lost all pressurization, declared an emergency and made an overweight landing at an alternate airport.