<< >> NASA ASRS Report 107643, March 1989

Flight returned to departure airport immediately after takeoff because of illumination of the cabin door unlock light.

Attributes
ACN	107643
Time
Date	198903
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : alb
State Reference	NY
Altitude	msl bound lower : 0 msl bound upper : 1500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : alb
Operator	common carrier : air carrier
Make Model Name	Medium Transport, High Wing, 2 Turboprop Eng
Flight Phase	climbout : initial descent : approach 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 : 210 flight time total : 13200
ASRS Report	107643
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical non adherence : far other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After takeoff we got a cabin door unlocked light in the cockpit. I called the F/a and told her to take a seat and strap herself in. We then returned to the alb airport, made a normal landing and went to our gate. I checked the door and found that it was closed ok. I then opened it and closed it. The light in the cockpit went out and was working normally. I then determined that the light gave us a temporary false signal and was now working normally. I notified our dispatch and continued on. There was not any further trouble with the light. Later my chief pilot told me that I should have recorded the malfunction in the log book and have maintenance check it. The flight crew was not aware that a temporary malfunctioning ann light requires maintenance action. Our ground schools spend most of their time on aircraft systems and very little on regulations. I feel that we should have been aware of these requirements.

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Original NASA ASRS Text

Title: FLT RETURNED TO DEP ARPT IMMEDIATELY AFTER TKOF BECAUSE OF ILLUMINATION OF THE CABIN DOOR UNLOCK LIGHT.

Narrative: AFTER TKOF WE GOT A CABIN DOOR UNLOCKED LIGHT IN THE COCKPIT. I CALLED THE F/A AND TOLD HER TO TAKE A SEAT AND STRAP HERSELF IN. WE THEN RETURNED TO THE ALB ARPT, MADE A NORMAL LNDG AND WENT TO OUR GATE. I CHKED THE DOOR AND FOUND THAT IT WAS CLOSED OK. I THEN OPENED IT AND CLOSED IT. THE LIGHT IN THE COCKPIT WENT OUT AND WAS WORKING NORMALLY. I THEN DETERMINED THAT THE LIGHT GAVE US A TEMPORARY FALSE SIGNAL AND WAS NOW WORKING NORMALLY. I NOTIFIED OUR DISPATCH AND CONTINUED ON. THERE WAS NOT ANY FURTHER TROUBLE WITH THE LIGHT. LATER MY CHIEF PLT TOLD ME THAT I SHOULD HAVE RECORDED THE MALFUNCTION IN THE LOG BOOK AND HAVE MAINT CHK IT. THE FLT CREW WAS NOT AWARE THAT A TEMPORARY MALFUNCTIONING ANN LIGHT REQUIRES MAINT ACTION. OUR GND SCHOOLS SPEND MOST OF THEIR TIME ON ACFT SYSTEMS AND VERY LITTLE ON REGS. I FEEL THAT WE SHOULD HAVE BEEN AWARE OF THESE REQUIREMENTS.

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.