04.G-2024-27.03

Isi rekomendasi

After more than six continuous hours of work in an eight-hour shift, especially under operational and environmental demands, the mental resources available to conduct a task may be reduced, and fatigue may begin to develop. Even mild fatigue can reduce vigilance and the thoroughness of routine checks, often without the individual being aware of it.When GSE Operator 1 placed the wheel chock, he also planned to operate another GSE, which required him to leave the LST to perform another task. The event occurred at around 2130 LT, when the circadian rhythm prepares the body for rest. Working during this period can lead to performance degradation, as natural alertness and attention decline, reducing overall vigilance. The investigation did not find any means available to verify the proper placement of the wheel chock other than the procedure that requires the GSE operator to place the wheel chock properly. Without any means to verify proper placement of the wheel chock, the combination of developing fatigue and late-evening work might have influenced the improper placement of the wheel chock. Therefore, KNKT recommends that PT Gapura Angkasa develop a mechnism to verify the proper placement of the wheel chock.