Air carrier frt aircraft has cargo door light come on during cruise.

Attributes
ACN	203528
Time
Date	199203
Day	Tue
Local Time Of Day	0001 To 0600
Place
Locale Reference	atc facility : lit
State Reference	AR
Altitude	msl bound lower : 10000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zme
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	cruise other descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 8600 flight time type : 3500
ASRS Report	203528
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

During cruise FL330 en route the cargo door open light came on at so panel. We checked the main panel at the 96 bulkhead and it also indicated open and the #1 drift pin light was also lighted. There was no turbulence present and the aircraft remained pressurized at 8 psi. In accordance with company procedure the outflow override switch was already in override preventing activation of the ground venturi fan and any resulting depressurization ATC center was advised of the problem, but no emergency was declared. I requested lower altitude and we extended a normal descent to 10000 ft. We elected to keep 1-2 for 0/pressure on the door to hold it in place. After 10 mins at 10000 ft (about 20 mins after problem was first noted) all warning lights went out. We continued to cvg at 10000 ft and landed without any further problems or warning lights. This door has had this problem before and was again signed off as 'ground check ok.'

Original NASA ASRS Text

Title: ACR FRT ACFT HAS CARGO DOOR LIGHT COME ON DURING CRUISE.

Narrative: DURING CRUISE FL330 ENRTE THE CARGO DOOR OPEN LIGHT CAME ON AT SO PANEL. WE CHKED THE MAIN PANEL AT THE 96 BULKHEAD AND IT ALSO INDICATED OPEN AND THE #1 DRIFT PIN LIGHT WAS ALSO LIGHTED. THERE WAS NO TURB PRESENT AND THE ACFT REMAINED PRESSURIZED AT 8 PSI. IN ACCORDANCE WITH COMPANY PROC THE OUTFLOW OVERRIDE SWITCH WAS ALREADY IN OVERRIDE PREVENTING ACTIVATION OF THE GND VENTURI FAN AND ANY RESULTING DEPRESSURIZATION ATC CTR WAS ADVISED OF THE PROBLEM, BUT NO EMER WAS DECLARED. I REQUESTED LOWER ALT AND WE EXTENDED A NORMAL DSCNT TO 10000 FT. WE ELECTED TO KEEP 1-2 FOR 0/PRESSURE ON THE DOOR TO HOLD IT IN PLACE. AFTER 10 MINS AT 10000 FT (ABOUT 20 MINS AFTER PROBLEM WAS FIRST NOTED) ALL WARNING LIGHTS WENT OUT. WE CONTINUED TO CVG AT 10000 FT AND LANDED WITHOUT ANY FURTHER PROBLEMS OR WARNING LIGHTS. THIS DOOR HAS HAD THIS PROBLEM BEFORE AND WAS AGAIN SIGNED OFF AS 'GND CHK OK.'

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.