AT 10:34 AM THE HOIST ENGINEER SHUT DOWN #34 MAN HOIST FOR ELECTRICAL REPAIRMEN TO PERFORM MAINTENANCE ON ELECTRICAL RESISTORS. 3 OF APPROX. 80 RESISTORS WERE CHANGED. NO ACCIDENT OR DAMAGE WA S INVOLVED. HOIST ENGINEER REPORTED BY PHONE TO MSHA AT 11:03 AM & AGAIN AT START UP TIME 12:24 PM.