HOIST PLC SHOWED PINION BRAKE RELEASE FAULT. OPERATOR DID NOT TURN ON MAIN AIR VALVE BACK ON AFTER RESETTING SPV4 AND SPV5 VALVES STUCK IN MAIN BRAKE PANEL WHICH THE PLC INDICATED. OPERATOR WA S CHECKING THE AUTOMATIC OILER AND SEDIMENT BOWLS AT THIS TIME. THE MINE WAS EVACUATED AT 7:35AMAND COMPLETE AT 7:50 AM THE MAIN AIR VALVE WAS TURNED ON, THE HOIST TESTED AND MINERS RETURNED