When our company bought 767's we had Boeing reps for the first few months. Every other word was an acronym. Ovbiously wanting to take the p...s as we Brits do, we told them we'd had a report that the 2way S.B.V. on the toilet system was faulty. All 3 reps spent ages looking in the manuals looking for the 2 way S.B.V. Many faxes, phone calls back to Boeing failed to identify the 2 way S.B.V. We had to tell them there was no such thing and would they please not assume we knew what they meant when using abrev. We told them it could stand for a *2 way suck back valve* They were heard to say after many beers and as they were leaving....What a great name for a valve !!!
PIMU. DADC. PRSOV. HPSOV. PCU. It never ends!!!