B767 flight crew has pressurization difficulties, declares an emergency and returns to ord.

Attributes
ACN	583082
Time
Date	200305
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	navaid : elx.vortac
State Reference	MI
Altitude	msl single value : 25000
Aircraft 1
Controlling Facilities	artcc : zob.artcc
Operator	common carrier : air carrier
Make Model Name	B767 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	583082
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : eicas warning duct leak, pack trip other flight crewa other flight crewb
Resolutory Action	flight crew : diverted to another airport flight crew : landed in emergency condition flight crew : landed as precaution flight crew : declared emergency other
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

After takeoff and climbing through 25000 ft, a right strut duct leak message appeared on the screen. It was soon followed by a right pack trip and the right hpsov shut down. Maintenance was called and they recommended we return to ord, as this might be a big problem. We returned and declared emergency, followed by an overweight landing.

Original NASA ASRS Text

Title: B767 FLT CREW HAS PRESSURIZATION DIFFICULTIES, DECLARES AN EMER AND RETURNS TO ORD.

Narrative: AFTER TKOF AND CLBING THROUGH 25000 FT, A R STRUT DUCT LEAK MESSAGE APPEARED ON THE SCREEN. IT WAS SOON FOLLOWED BY A R PACK TRIP AND THE R HPSOV SHUT DOWN. MAINT WAS CALLED AND THEY RECOMMENDED WE RETURN TO ORD, AS THIS MIGHT BE A BIG PROB. WE RETURNED AND DECLARED EMER, FOLLOWED BY AN OVERWT LNDG.

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.