Stationair .. you are shooting from the hip mate:
The aircraft may be on different schedule to a 200 hr programme; more aligned with high ratio of cycles to flight hours.
We do know that Tropicair has the best engineering in country
Electrical has nothing to do with this; the gear failed upon landing, according to PNG AIC prelim report
Conditions in PNG are no different to Indonesia, North Queensland, Northern Territory and so forth. The point I'm making is that the aircraft does not know where it is located; its a mechanical device made by man and one day it might just let you down.