[c-nsp] Bus Board

[hjan]

I've seen this strange log on one of my gsr:

Aug 20 20:06:19.901: %MBUS-6-OIR: Bus Board(16) Inserted into Slot 27
Aug 20 20:06:56.277: %MBUS-6-OIR: Bus Board(16) Removed from Slot 27

A show env power shows:
gippa#               sh environment power_supply
Slot #          48V     AMP_48
                (Volt)  (Amp)

GSR is up and running however :)
gippa#sh gsr | i 2
Slot 2  type  = 1 Port Packet Over SONET OC-48c/STM-16
Slot 12 type  = 1 Port Packet Over SONET OC-48c/STM-16
Slot 20 type  = Switch Fabric Card 16XOC48
Slot 24 type  = Alarm Module(16)
Slot 25 type  = Alarm Module(16)
Slot 28 type  = Standard Blower Module(16)
Slot 29 type  = Standard Blower Module(16)

slot 27 not present!

Someone have already hits this behaviour ? Do you think it's safe to
power cycle the machine due to the fact that this is a production machine ?
IOS release is 12.0(28)S5.

Regards,
Gianluca