What was found
LAX FLIGHT NR 2385: FUSELAGE DOOR MASTER WARNING ILLUMINATED IN CRUISE FLIGHT. CHECKLIST COMPLETED. MAIN CABIN DOOR SHOWING OPEN. PRESSURIZATION APPEARED NORMAL. MAINTENANCE INTERROGATED PSEU AND FOUND PADRKL UNREASONABLY FAR. ADJUSTED PAX DOOR LOCKED SENSOR IAW Q400 AMM TASK 71-01-830-803. PSEU REPORTS PADRKL OD AND INDUCTANCE VALUES IN MIDDLE RANGE AS REQUIRED PER TASK. NO OTHER DEFECTS NOTED. PRESSURIZED AND DEPRESSURIZED AC IAW Q400 AMM TASKS 21-00-00-863-801 AND 21-00-00-863-802. NO LEAKS NOTED. OPS CHECKS GOOD. NO PARTS REPLACED AND AIRCRAFT RETURNED TO SERVICE.