OPERATIONAL TEST OF THE IDG DISCONNECT ANDRECONNECT FUNCTIONThe IDG will be disconnected in case of:- oil overheat (high oil out temperature),- oil pressure drop when not caused by drive under speed.The amber fault legend of the ELECtrical/IDG P/BSWs comes on, andthe master caution is triggered. In this case, the related IDG should bemanually disconnected. For this, push to disconnect the IDG safetyguarded P/BSW installed on the panel 235 VU.CAUTION: ENGAGE THE IDG DISCONNECT MECHANISM WITHTHE DISCONNECT RESET RING BEFORE YOU STARTTHE ENGINE. IF NOT, YOU WILL CAUSE DAMAGETO THE GEAR TEETH, AT ENGINE START.YOU CAN DAMAGE THE DISCONNECT SOLENOIDBECAUSE OF OVERHEATING IF: YOU PUSH THE IDGDISCONNECT P/BSW FOR MORE THAN 3 SECONDS.THERE MUST BE AT LEAST 60 SECONDS BETWEEN2 OPERATIONS OF THE SWITCH.On the ELEC control panel, push the related IDG P/BSW.On the IDG slowly pull out the disconnect reset ring to the full limit oftravel. If you feel a click while you hold the disconnect reset ring, thisshows that the disconnect function operates correctly. Let the disconnectreset ring go slowly back to the initial position.NOTE: The IDG disconnection is irreversible in flight. Reconnectionof the system is then possible only on the ground with enginesshut down.There are two different AMM tasks for the operational test ofthe IDG disconnect and reconnect (reset) function, dependingon whether the engine is stopped or in operation.The procedure is identical on the A330.