A DC9 crew experienced a loss of cabin pressure at FL260 during cruise.

Attributes
ACN	514237
Time
Date	200106
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	navaid : rap.vortac
State Reference	SD
Altitude	msl bound lower : 11000 msl bound upper : 26000
Environment
Flight Conditions	Mixed
Weather Elements	Thunderstorm Ice
Light	Night
Aircraft 1
Controlling Facilities	artcc : zdv.artcc artcc : zmp.artcc tracon : rap.tracon tracon : pct.tracon
Operator	common carrier : air carrier
Make Model Name	DC-9 30
Operating Under FAR Part	Part 121
Navigation In Use	other vortac
Flight Phase	cruise : enroute altitude change
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : atp
Experience	flight time last 90 days : 150 flight time total : 11500 flight time type : 8000
ASRS Report	514237
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Resolutory Action	controller : issued new clearance controller : provided flight assist flight crew : declared emergency flight crew : overcame equipment problem
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

At FL260, 125 mi east of rap, cabin pressure light illuminated. The cabin started to climb from 7500 ft cabin altitude to 10000 ft. Checklist was initiated and descent started. Cabin altitude climbed to 14000 ft. Cabin oxygen light and aft cargo door light illuminated, masks were deployed. Descended to 11000 ft. No further problems.

Original NASA ASRS Text

Title: A DC9 CREW EXPERIENCED A LOSS OF CABIN PRESSURE AT FL260 DURING CRUISE.

Narrative: AT FL260, 125 MI E OF RAP, CABIN PRESSURE LIGHT ILLUMINATED. THE CABIN STARTED TO CLB FROM 7500 FT CABIN ALT TO 10000 FT. CHKLIST WAS INITIATED AND DSCNT STARTED. CABIN ALT CLBED TO 14000 FT. CABIN OXYGEN LIGHT AND AFT CARGO DOOR LIGHT ILLUMINATED, MASKS WERE DEPLOYED. DSNDED TO 11000 FT. NO FURTHER PROBS.

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.