What is this orange container for? It reads
Flight kit wheel. Do not remove.
What's a "flight kit wheel"?
Aviation Stack Exchange is a question and answer site for aircraft pilots, mechanics, and enthusiasts. It only takes a minute to sign up.Sign up to join this community
Corsair is a small airline, with a limited number of aircraft, serving airports in remote islands from Paris. For their economical survival their aircraft must keep a high operational ratio. However:
The airline may not have a maintenance facility at destination, either a owned facility or an agreement for maintenance services from another company locally based.
The facility may not have a satisfactory stock of spare parts for their aircraft or the required tools, and no possibility to obtain them in a very short time, even from their main base.
A common solution is to bring parts aboard, in particular MEL components that are the most likely to fail. It's a balance between the cost to carry the container and the cost of extra wait time (better said by FreeMan in a comment below: The weight penalty is much lower than the wait penalty.)
This container contains a spare wheel and the related tooling.
These containers marked "Flight kit", "Fly away kit" (FAK), "Do not unload", "Do not offload", etc, contain components or tools intended to remain on board and be used at the next stopover in case of necessity.
Loading a flight kit, source Linde
Often these containers contain spare wheel kits.
Flight kit wheels in cargo hold (Malawi elections inspection). Source
Spare parts are commonly seen aboard aircraft serving remote isolated locations with light traffic, where maintenance may be difficult at the moment.
And actually Corsair is a small French airline based at Paris-Orly (LFPO), which has a taste of holidays. Their 5 aircraft take people from Paris to beautiful beaches on islands where airports don't have large maintenance facilities. (For a long time Corsair used Boeing 747 Classic, with inspirational tail numbers, meaning also less common spare parts.)
In such a small airline, when an aircraft is grounded the schedule of the others is indeed disrupted, the shorter, the better.
Rather than having the most used spare parts at multiple stopovers, or having to wait for one shipped from Orly (or another stopover: Fort-de-France, Pointe-à-Pitre, La Réunion), a good tradeoff is to have them aboard.
Parts in the container are secured to prevent them from moving.
AKN FSK container for Air France (Source)