B727-200 crew lost automatic pressurization control in ZJX class a.

Attributes
ACN	506710
Time
Date	200103
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zjx.artcc
State Reference	FL
Altitude	msl single value : 28000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zjx.artcc
Operator	common carrier : air carrier
Make Model Name	B727-200
Flight Phase	climbout : intermediate altitude cruise : enroute altitude change
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	506710
Person 2
Qualification	pilot : atp
ASRS Report	506710
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Resolutory Action	aircraft : equipment problem dissipated other
Consequence	other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Automatic pressure controller malfunction. Location: approximately 100 mi west of tpa, departure on climb out, passing FL280, cabin altitude indicated approximately 10000 ft. Requested a descent to 10000 ft. Descended to 10000 ft to investigate cause. Pressurization was returned to normal with use of manual AC control. Aircraft checklists, system inspections followed and indicated normal. Requested climb to FL260. Cabin altitude remained normal during remainder of flight.

Original NASA ASRS Text

Title: B727-200 CREW LOST AUTOMATIC PRESSURIZATION CTL IN ZJX CLASS A.

Narrative: AUTO PRESSURE CTLR MALFUNCTION. LOCATION: APPROX 100 MI W OF TPA, DEP ON CLBOUT, PASSING FL280, CABIN ALT INDICATED APPROX 10000 FT. REQUESTED A DSCNT TO 10000 FT. DSNDED TO 10000 FT TO INVESTIGATE CAUSE. PRESSURIZATION WAS RETURNED TO NORMAL WITH USE OF MANUAL AC CTL. ACFT CHKLISTS, SYS INSPECTIONS FOLLOWED AND INDICATED NORMAL. REQUESTED CLB TO FL260. CABIN ALT REMAINED NORMAL DURING REMAINDER OF FLT.

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.