What was found
NOSE DOOR OPEN MASTER WARNING IN CRUISE 6000 FT 250 KNTS. FOLLOWED QRH GEAR DOWN 3 GREEN WITH NO FURTHER MSG. RECEIVED A GEAR DISAGREE FOR JUST A FEW SECONDS AFTER RETRACTION THAT CLEARED WITHIN 3 - 5 SHOWING THE NOSE GEAR RED BUT IT CLEARED WITH NO REMAINING. FOUND PROX SENSORS PS18GA + PS19GA OUT OF LIMITS ADJUSTED IAW AMM 32-61-05. PERFORMED FUNCTIONAL TEST OF LG EXT & RETRACTION. ALL PUMPS UP 13 SEC, DWN 12 SEC, 3A UP 16 SEC, DWN 16 SEC, 3B 18 SEC & DWN 18 SEC. OPERATIONS CHECKED GOOD IAW 32-30-00. IAW FIM NO LEAKS FOUND FOR NOSE GEAR AREA IAW AMM 32-00-00. OK FOR SERVICE. SEE CONTINUATION CARDS N63638 + N61501.