What was found
DURING FINAL APPROACH PROPELLER RPM INDICATED 920 AND 940 ON #1 & #2 ENGINES RESPECTIVELY WHILE CONDITION LEVERS WERE SET TO MAX. LANDING UNEVENTFUL. REMOVED FROM SERVICE. CHECKED FOR FAULT CODES REF Q400 AMM 71-20-00-710-804, NONE PRESENT. PERFORMED EMU DOWNLOAD REF T/C 6773101. REFERENCE FIM 71-00-00-810-813 STEP 1A, A MAXIMUM DIFFERENCE OF 40 RPM IS WITHIN NORMAL TOLERANCE DURING APPROACH AND A/C IS OKAY FOR RTS. REFERENCE SERVICE LETTER DH8-400-SL-61-003A FOR INFO ONLY.RETURNED TO SERVICE. NO PARTS REPLACED.