What was found
REPEAT 3RD TIME IN 5 DAYS. MAIN CARGO DOOR LIGHT CAME ON WHEN CLIMBING ABOVE 290. LIGHT FLICKERED INITIALLY THEN CAME ON STEADY. DESCENDING DOWN TO 290 LIGHT WENT OUT MOMENTARILY. DIVERTED A/C AND FOLLOWED RED TAB PROCEDURES. LIGHT CAME ON AND OFF INTERMITTENTLY DURING DESCENT AND WENT AT 18K. TROUBLESHOT PER 727 WDM 52-31-01 AND ALL PREVIOUS WRI'S. R & R CARGO DOOR ARM DISARM RELAY R9015 PER SMP. PRESSURIZED A/C TO 6.5 DIFFERENTIAL ALL OPERATIONS NORMAL THROUGH PRESSURIZATION AND DEPRESSURIZATION. CYCLED DOOR NUMEROUS TIMES WITH NORMAL INDICATION EVERY TIME.