Head of the local chapter of the National Search and Rescue Agency (Basarnas) Budiman confirmed the incident saying the agency has deployed a team to find the aircraft.
"We have deployed a helicopter and a speed boat for the search operation," he added.
He noted that two persons were on board the trainer, Boon, a Singaporean instructor, and R Jati, a trainee from Jakarta.
The plane departed from Lombok International Airport for Sultan Muhammad Kaharuddin III in Sumbawa Besar, but lost contact near Moyo island at around 10.30am.
The Basarnas in Mataram received a report around 2pm and it immediately deployed a search team to locate the aircraft.
Sultan Kaharuddin III airport, police, and fishermen are also involved in the search operation, he stated.(*)