04-O-2021-12.1

Isi rekomendasi

The filed flight plan for the accident flight indicated that the aircraft was operated under Visual Flight Rule (VFR). The aircraft operator Operation Manual – Part A (OM – Part A) subchapter 8.6.1 restricts any pilot to operate an aircraft under VFR to fly through clouds.When the PK-OTW was about 5 Nm to Bilorai, the SIC advised a pilot of DHC-6-400 aircraft registered PK-OTJ that the PK-OTW was on descend and would fly through clouds. Flying under VFR through clouds is contrary to the OM – Part A subchapter 8.6.1 which could make the pilot unable to see terrain or obstacle of the surrounding area.Therefore, KNKT recommends the aircraft operator to ensure all flights under VFR shall be conducted at or above the required weather minima.