Hi Malcolm.
PK-YRO was destroyed in an accident in 2006
ASN Aircraft accident de Havilland Canada DHC-4A Caribou PK-YRO Mamit
PK-YRJ is still flying I believe , I spoke with the operator 6 months ago and they said they still have a Caribou.
What's weird is both aircraft are still shown on Trigana's fleet list
.:: Direktorat Jenderal Perhubungan Udara ::.