Flapbak,
Dunno anything about HA but your numbers are questionable
(6-18 AW139 drivers from CHC Nigeria). CHC only has 2 AW139's in Nigeria with mixed local and expat crews, so I doubt there are even 6 expats total who are qualified on the machine and
AFAIK none of them are Aussies or Kiwis. I would therefore be very surprised if any of the pilots recruited by HA were 139 pilots from CHC Nigeria.