I will tell you my kinds of problem that can happen anytime. I get paid to overcome these.
Enjoy

at RBS:
PlugInUnit_BoardSwitchCoreFault
Synch Reference Path HW Fault
AiDevice_ExternalUnitFailure
AiuDeviceGroup_ExternalUnitFailure
AuxPlugInUnit_PiuConnectionLost
Carrier_RxDiversityLost
TmaDevice_LnaFailure
Rbs_NodeSynchronizationFailure
TU Synch Reference Loss of Signal
System Clock Quality Degradation
Loss of synchronisation

at RNC:
call_establishment_error
MTP3b RouteSetUnavailable
NbapDedicated_RncRbsControlLinkDown
UtranCell_NbapMessageFailure
CchFrameSynch_TimingAdjCtrlFrame
UtranCell_RBSLocalCellNotAdded
NodeSynchTp_Initial_Phase_Difference
Remote Defect Indication on IMA Link
PDH Degraded Signal
CchFrameSynch_TooLateDataFrameDiscard
Degraded Signal(degraded_signal_m3100)
NodeSynchTp_Threshold_Exceeded