What was found
PDX FLIGHT NR 2415: FUSELAGE DOOR MASTER WARNING LIGHT CAME ON DURING TAKEOFF ROLL. MAINTENANCE FOUND PSEU RIGGING HISTORY OF ASDRLK FAR GAP TOO SMALL AND NEAR FLAP TOO LARGE. WITH ASD CLOSED AND LOCKED FOUND ASDRLK SENSOR MH VARIED BY OVER .5MH WITH NO DOOR MOVEMENT AS WELL AS ASSOCIATED FUSELAGE DOOR WARNING INDICATION. SPLICED NEW SENSOR ONTO DOOR. OPS CHECK GOOD. NO ABNORMAL WARNING LIGHTS NOTED WITH DOOR CLOSED. AIRCRAFT RETURNED TO SERVICE.