Flight crew of a DC9-30 return land after the cabin was not pressurizing.

Attributes
ACN	426915
Time
Date	199901
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : dtw
State Reference	MI
Altitude	msl bound lower : 10000 msl bound upper : 17000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tower : chs
Operator	common carrier : air carrier
Make Model Name	DC-9 30
Route In Use	departure other enroute airway : zob
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer
Experience	flight time last 90 days : 180 flight time total : 15000 flight time type : 11000
ASRS Report	426915
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

During climb out of dtw and climbing through 10000 ft noticed cabin rate of climb slightly higher than normal. Attempted to adjust rate down on automatic controller. When cabin controller reached 10500 ft, we initiated a rapid descent to 10000 ft with ATC approval and completed the loss of pressurization checklist and returned to dtw with no other incident.

Original NASA ASRS Text

Title: FLC OF A DC9-30 RETURN LAND AFTER THE CABIN WAS NOT PRESSURIZING.

Narrative: DURING CLBOUT OF DTW AND CLBING THROUGH 10000 FT NOTICED CABIN RATE OF CLB SLIGHTLY HIGHER THAN NORMAL. ATTEMPTED TO ADJUST RATE DOWN ON AUTO CONTROLLER. WHEN CABIN CONTROLLER REACHED 10500 FT, WE INITIATED A RAPID DSCNT TO 10000 FT WITH ATC APPROVAL AND COMPLETED THE LOSS OF PRESSURIZATION CHKLIST AND RETURNED TO DTW WITH NO OTHER INCIDENT.

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.