Narrative:

Prior to 80 KTS on takeoff, master caution aft cargo door lights illuminated, takeoff rejected. Return to gate. 'Light malfunction' -- door was closed and locked throughout the event.

Google
 

Original NASA ASRS Text

Title: B737-400 ACFT ON TKOF ROLL HAD MASTER CAUTION AND AFT CARGO DOOR LIGHTS ILLUMINATE. RPTR CAPT ABORTED THE TKOF, TAXIED BACK TO THE GATE WHERE THE DOOR WAS CHKED CLOSED AND THE FLT CONTINUED. FAULTY LIGHT SWITCH.

Narrative: PRIOR TO 80 KTS ON TKOF, MASTER CAUTION AFT CARGO DOOR LIGHTS ILLUMINATED, TKOF REJECTED. RETURN TO GATE. 'LIGHT MALFUNCTION' -- DOOR WAS CLOSED AND LOCKED THROUGHOUT THE EVENT.

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.