A320, en-route, southeast of Karimunjawa Indonesia, 2024

A320, en-route, southeast of Karimunjawa Indonesia, 2024

Summary

On 25 January 2024, an Airbus A320 first officer inadvertently fell asleep while the captain was already intentionally sleeping en route. Prior approval to temporarily deviate around adverse weather had been given followed by an instruction to join a destination arrival procedure that began 125 nm away. After over 200 nm of further flight and almost half an hour out of ATC contact, the captain woke up, took control and woke up the other pilot. ATC were then contacted for instructions on regaining the arrival route after a significant unapproved deviation from clearance, and the flight was completed without further event.

Description

On 25 January 2024, both pilots of an Airbus A320 (PK-LUV) operated by Batik Air Indonesia on a scheduled domestic passenger flight from Kendari to Jakarta Soekarno-Hatta as BTK 6723 in day visual meteorological conditions (VMC) were simultaneously asleep for almost half an hour when level at FL360. According to the report, the first officer fell asleep inadvertently after the captain had intentionally taken a sleep break. A deviation of around 80 nm from the flight-planned track occurred and was corrected only when the sleeping captain woke up. Air traffic control (ATC) provided an appropriate heading to regain the required track.

Investigation

An investigation was carried out by the Indonesian NTSC. Both the cockpit voice recorder (CVR) and the flight data recorder (FDR) were removed from the aircraft and downloaded and useful valuable data was accessed from both recorders.

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