posted on May, 3 2020 @ 08:55 AM
a reply to:
Mark98SS
It honestly depends on what aircraft type, how long and what path you go down. By the latter I mean some engine manufacturer will give you a basic
procedure for say a 7 day, 15 day, 30 day or 3-6 month layup and so on. It might be for example that you have to inhibit the engine with preserving
oil and lay 10's of kilos of gelatin bags to absorb moisture in the inlets and outlets of the engine. However they may also give you an alternate
procedure under something like whats known as a TV procedure (Technical Variance) that says "you dont have to do this so long as you run the engines
at idle for a t least 15 mins every 15 days". Every manufacturer has different procedures, and they all vary depending on how long the aircraft is
laid up. But as a general rule Zaph is spot on in that you can expect it to take at least the better part of a week plus and a lot of man hours to
bring back just one aircraft that has been out of service for more than a few weeks. Whats funny about that is how few airline executives have any
real understanding of that or what kinds of manpower and resources are going to be needed or involved. For those airlines that survive this, its going
to be hilarious watching the execs squirm and carry on as their maintenance divisions and MRO's point out the salient facts to them. Man is there
going to be some monumental overtime caused by this as the work piles up. I know for a fact that my company has dozens of 737's that dont have the
approved pitot covers and have been bagged. When it comes time all those unapproved covering materials will come off and then the pitots will need to
be removed, cleaned and all the sense lines purged on each one. Thats a massive job across an entire fleet, but there isn't an alternative. As you can
see, its not straight forward and easy by a long shot.