Go AWOL

AWOL: absent from one's post but without intent to desert."the men have gone AWOL".

Go AWOL: “desaparecer”

• Two computers went AWOL last weekend. [ Dois computadores sumiram no último fim de semana. ]
• The inmates went AWOL and nobody saw it. [ Os presos desapareceram e ninguém viu. ]

Fonte: English Expert