Deleting the Duplicate group

Hi,

I have a below scenario. Kindly help me out.

input:

Record Flag

102     Y

102     N

102     Y

103     Y

103     Y

103     Y

103 records have all the flags set to "Y" so it should be there in the output, similarly for 102 record which have flag as "N" the entire group 102 should be  discarded.

output should be:

Record Flag

103     Y

103     Y

103     Y

Regards

Krishna Mohan