@MacSparky released a Blog post yesterday regarding the named topic.
And I like to take the chance, to give some more informations regarding this.
I know it is convenient to be able to track the luggage, but there are technical reasons for a current legislation, that ban those trackers from almost all Aircraft.
The operation of a Modern Aircraft trusts on a wide range of different data gained by different technologies and sensors all around the Aircraft.
A lot of operations work with the measurement of Radio Signals, and the differences between them. Among those are for example the Radio Altimeter, the Instrument Landing System, the Navigation System and a few more.
With a working radio signal aboard the Aircraft, not belonging to its own infrastructure, those signals could be disturbed, and therefore getting completely lost, or worse, be just wrong.
Therefore it is a current (almost worldwide) legal regulation, that at least during certain phases of the flight, all transmitting devices has to been switched of completely, or at least been set in a flight mode.
That is not possible, with an AirTag inside the Baggage Compartment.
That is the reason, those devices are banned, while not switched off, from almost ALL flights.
It might be inconvenient, not to know the exact position of your Bag, but it is a lot more inconvenient, if you know your Bag to be on board, but missing the RWY, during a Bad Weather Approach by a Mile, because of your AirTag the Plane “thought” to be 300’ higher, as it actually was.
Of course it is a major problem, that a lot of Airline Passengers seems to have the impression, that laws only belong to everybody else, and that a lot of Airline Customer Services (and Managements) don’t have the Stand, to fight those legal requirements, even if they are inconvenient for their passengers.