Light transport air carrier has door light illuminate on initial climb. Return land.

Attributes
ACN	227502
Time
Date	199211
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : bos
State Reference	MA
Altitude	agl bound lower : 0 agl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tower : bos
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Navigation In Use	Other
Flight Phase	climbout : takeoff climbout : initial landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : atp pilot : instrument
Experience	flight time last 90 days : 100 flight time total : 6000 flight time type : 800
ASRS Report	227502
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

At 400 AGL on departure, aft cabin door annunciator illuminated. Completed climb checklist and abnormal procedures checklist for cabin door annunciator. Informed boston approach of our need to return and declared an emergency due to the necessity of landing above maximum gross landing weight. Passenger were briefed, a normal approach and landing was accomplished.

Original NASA ASRS Text

Title: LTT ACR HAS DOOR LIGHT ILLUMINATE ON INITIAL CLB. RETURN LAND.

Narrative: AT 400 AGL ON DEP, AFT CABIN DOOR ANNUNCIATOR ILLUMINATED. COMPLETED CLB CHKLIST AND ABNORMAL PROCS CHKLIST FOR CABIN DOOR ANNUNCIATOR. INFORMED BOSTON APCH OF OUR NEED TO RETURN AND DECLARED AN EMER DUE TO THE NECESSITY OF LNDG ABOVE MAX GROSS LNDG WT. PAX WERE BRIEFED, A NORMAL APCH AND LNDG WAS ACCOMPLISHED.

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.