An internal investigation by Biman Bangladesh Airlines has confirmed five technical faults in the aircraft carrying Prime Minister Tarique Rahman home from Japan on October 29, following a nearly five-hour departure delay at Narita International Airport.

The committee’s review of the aircraft’s technical logbook and maintenance records identified faults involving spoiler and flap extension, pitot heating, and the right and left ram air fan systems.

A Biman source said the committee had submitted its report, with the ministry expected to decide on further action.

The faults were detected just before flight BG-377 was due to take off from Narita following the prime minister’s Japan visit. Biman’s engineering team and Japanese technicians worked to rectify the problems before the aircraft departed for Dhaka.

Given the seriousness of the incident, Biman formed a four-member internal investigation committee on October 30.

Former Biman director Nafiz Imtiaz Uddin told the media that a spoiler failing to move up and down indicated a problem involving the sensor or aircraft system.

He stressed that passenger safety must take precedence and that an aircraft carrying the prime minister should undergo thorough checks. Any faults established by the investigation must prompt appropriate action, he said.