A Casa 212-100 operated by Indonesia's Sabang Meruke Raya Air Charter crashed in Bintan island on Saturday during a test flight.
The aircraft, with the registration PK-ZAI, was on a test flight after taking off from the Indonesian island of Batam. All five crew died.
The aircraft had just undergone a maintenance stop and had its No 1 engine replaced, says Tatang Kurniadi, the chairman of Indonesia's National Transport Safety Committee.
Indonesia's Ministry of Transport adds that the aircraft departed from Batam and checked in with Tanjung Pinang Approach at 13:41h local time. However, ground staff lost contact two minutes later and attempts by a Lion Air aircraft in the vicinity to communicate with it proved unsuccessful.
Officials from the NTSC have recovered the aircraft and investigations are underway.