Took a trip on Pan American B.747 from JFK to Paris. The scheduled aircraft had gone U/S so they quick turned an arrival. About an hour out we and they discovered the potable water had not been serviced. Full boat of course. Not a great rest of the trip. The bottled water ran out of course, people were washing with canned tonic and colas.
Thank heavens they had dumped and service the lavatories. Years before I saw/smelled got almost ill at another operator's Super Connie that had flown a MAC charter from Europe. Apparently they had not serviced them over there. Almost indescribable what those lavs looked like.