It's been HEPA for a while now, but couldn't say precisely when.
The "bugs in aircon" thing has been
doing the rounds for a while. It is an urban myth but it makes a great story at dinner parties. Other favourites include...
- Aircon packs routinely turned off to save fuel
- Cabin temp turned up to force sleep
- The brace position exists to enable dental identification post crash
- Lifejacket whistle and light are purely for reassurance
- Breast implants explode in a decompression
- Pilots are grey-haired steel-eyed Sky Gods: Flight Attendants are gay if male and sluts if female and all of them are brain dead fascists: Baggage Handlers are thieves, Ground Staff clueless and Airline Managers incompetent. Rules and regulations are made up on the back of a fag packet by people with no training or experience purely to inconvenience customers who know better. (Sorry, couldn't help myself there, it just bust out like a sneeze!)