Hey TTN, being on 214 at the same time as you and Pontifex I remember the Vault and ACP study well. Wasn't it a monthly or quarterly BTR requirement? However, I also seem to remember (not so well), that it was only rear crew who did the study period. Can't remember why it was only rear crew but possibly because the pilots did flight sims without the rear crew. I certainly have no recollection of keeping the front end in the dark (as they did to us)!