If they do not carefully follow the checklist each time before takeoff, the pilots increase the possibility of a tragic accident.
وَمِنَ ٱلضَّرُورِيِّ أَنْ يَتَحَقَّقَ مِنْ هٰذِهِ ٱلْقَائِمَةِ قَبْلَ كُلِّ رِحْلَةٍ .‏