Don't forget the CHC S76A++s and S61Ns based in Songkhla supporting Unocal and Chevron. The Thai Navy also operate S76Bs out of Utapao Airfield.
Most of the othere aircraft (helicopters) are operated by the Electricity Generating Authority of Thailand (EGAT) as well as the Thai Police. Most of these are Bell 206Ls and 412s. Sometime ago, PHI set up a maintenance program there at Lopburi but the venture failed and they are no longer in country.
