Main cabin door warning light illuminated during climb.

Attributes
ACN	118493
Time
Date	198908
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : roa
State Reference	VA
Altitude	msl bound lower : 4000 msl bound upper : 4000
Environment
Flight Conditions	IMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : roa
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : intermediate altitude descent other landing 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 : 242 flight time total : 15171
ASRS Report	118493
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

On climbout of roa the main cabin door warning light illuminated, leaving 4000'. The door was checked for security, the cabin depressurized, but the warning light did not extinguish. A precautionary landing was executed in accordance with the emergency checklist. It was then determined that the door pins worked normal but the warning light did not. The light was deferred and the flight was completed. The position of the door pins was difficult to ascertain in flight and I feel should be more certain considering the catastrophic results of a blown open door.

Original NASA ASRS Text

Title: MAIN CABIN DOOR WARNING LIGHT ILLUMINATED DURING CLIMB.

Narrative: ON CLIMBOUT OF ROA THE MAIN CABIN DOOR WARNING LIGHT ILLUMINATED, LEAVING 4000'. THE DOOR WAS CHECKED FOR SECURITY, THE CABIN DEPRESSURIZED, BUT THE WARNING LIGHT DID NOT EXTINGUISH. A PRECAUTIONARY LNDG WAS EXECUTED IN ACCORDANCE WITH THE EMER CHECKLIST. IT WAS THEN DETERMINED THAT THE DOOR PINS WORKED NORMAL BUT THE WARNING LIGHT DID NOT. THE LIGHT WAS DEFERRED AND THE FLT WAS COMPLETED. THE POSITION OF THE DOOR PINS WAS DIFFICULT TO ASCERTAIN IN FLT AND I FEEL SHOULD BE MORE CERTAIN CONSIDERING THE CATASTROPHIC RESULTS OF A BLOWN OPEN DOOR.

Data retrieved from NASA's ASRS site as of August 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.