Flight crew of a B727 declared an emergency and descended after loss of cabin pressurization.

Attributes
ACN	449085
Time
Date	199909
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : rbs.vor
State Reference	IL
Altitude	msl single value : 25000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau.artcc
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : vacating altitude climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 1400 flight time total : 480 flight time type : 480
ASRS Report	762
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 220 flight time total : 15500 flight time type : 8000
ASRS Report	449090
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : cabin pressure other flight crewa other flight crewb
Resolutory Action	controller : separated traffic flight crew : declared emergency flight crew : overcame equipment problem
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

While climbing to FL260, cabin pressure loss occurred at FL250. Cabin rate of climb pegged. Advised center had to leave altitude and started down. I think received clearance to FL180 then 15000 ft. After approximately 1 1/2 mi, was able to control cabin manually. Complied with all checklists and did not declare emergency, continued to stl.

Original NASA ASRS Text

Title: FLC OF A B727 DECLARED AN EMER AND DSNDED AFTER LOSS OF CABIN PRESSURIZATION.

Narrative: WHILE CLBING TO FL260, CABIN PRESSURE LOSS OCCURRED AT FL250. CABIN RATE OF CLB PEGGED. ADVISED CTR HAD TO LEAVE ALT AND STARTED DOWN. I THINK RECEIVED CLRNC TO FL180 THEN 15000 FT. AFTER APPROX 1 1/2 MI, WAS ABLE TO CTL CABIN MANUALLY. COMPLIED WITH ALL CHKLISTS AND DID NOT DECLARE EMER, CONTINUED TO STL.

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.