B757 flight crew has pressurization difficulties.

Attributes
ACN	556183
Time
Date	200208
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : csn.vortac
State Reference	VA
Altitude	msl single value : 31000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc.artcc
Operator	common carrier : air carrier
Make Model Name	Boeing Company Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : enroute altitude change
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : instrument pilot : flight engineer pilot : atp pilot : cfi pilot : commercial
Experience	flight time last 90 days : 165 flight time total : 14300 flight time type : 1997
ASRS Report	556183
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment : altitude alert aircraft equipment other aircraft equipment : eicas warning other flight crewa other flight crewb
Resolutory Action	controller : provided flight assist flight crew : declared emergency flight crew : overrode automation flight crew : overcame equipment problem
Consequence	other other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

During takeoff from lga, the left engine high stage bleed light illuminated. The checklist was complied with and maintenance notified. Just south of csn VOR in a gradual descent to FL310, the right pack failed. Reset was ok and a descent was initiated to a lower altitude. Passing FL280, it failed again and an emergency was declared with ZDC. The descent was continued to 10000 ft. During the descent, the pack reset again, however, a short time later pressurization automatic #1 and #2 failed. Manual operation was ok. Cabin exceeded 10000 ft for less than 1 min during the descent, and thus the passenger oxygen masks did not deploy. Upon leveloff at 10000 ft, we were able to stabilize the right pack in standby mode. A radio conference with the dispatcher and maintenance was completed and with their assistance, we were able to recover the automatic #2 pressurization controller. Discussions were held regarding a divert to iad. However, since the situation had been stabilized, WX conditions were excellent, and fuel was not a factor, the decision was reached to continue. The emergency was terminated and the flight continued to destination normally.

Original NASA ASRS Text

Title: B757 FLC HAS PRESSURIZATION DIFFICULTIES.

Narrative: DURING TKOF FROM LGA, THE L ENG HIGH STAGE BLEED LIGHT ILLUMINATED. THE CHKLIST WAS COMPLIED WITH AND MAINT NOTIFIED. JUST S OF CSN VOR IN A GRADUAL DSCNT TO FL310, THE R PACK FAILED. RESET WAS OK AND A DSCNT WAS INITIATED TO A LOWER ALT. PASSING FL280, IT FAILED AGAIN AND AN EMER WAS DECLARED WITH ZDC. THE DSCNT WAS CONTINUED TO 10000 FT. DURING THE DSCNT, THE PACK RESET AGAIN, HOWEVER, A SHORT TIME LATER PRESSURIZATION AUTO #1 AND #2 FAILED. MANUAL OP WAS OK. CABIN EXCEEDED 10000 FT FOR LESS THAN 1 MIN DURING THE DSCNT, AND THUS THE PAX OXYGEN MASKS DID NOT DEPLOY. UPON LEVELOFF AT 10000 FT, WE WERE ABLE TO STABILIZE THE R PACK IN STANDBY MODE. A RADIO CONFERENCE WITH THE DISPATCHER AND MAINT WAS COMPLETED AND WITH THEIR ASSISTANCE, WE WERE ABLE TO RECOVER THE AUTO #2 PRESSURIZATION CONTROLLER. DISCUSSIONS WERE HELD REGARDING A DIVERT TO IAD. HOWEVER, SINCE THE SIT HAD BEEN STABILIZED, WX CONDITIONS WERE EXCELLENT, AND FUEL WAS NOT A FACTOR, THE DECISION WAS REACHED TO CONTINUE. THE EMER WAS TERMINATED AND THE FLT CONTINUED TO DEST NORMALLY.

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.