Power chairs have so much more that can go wrong, get out of adjustment and can be damaged more easily.
At some airports that do not have cargo lifts I have seen it can take 4 to 5 people just to lift my new Permobil F3 on to the loading conveyor belt.
We frequently recommend taking your own photos of your chair from all sides (with today's newspaper on the seat to verify date) before taking it on the plane. This way you have a record of what the chair looked like exactly before the flight.
It is not uncommon for both manual and power wheelchairs to be put onto their side in the hold, and then if other luggage is in the same compartment, for that luggage to be piled on top. Very few airlines put wheelchairs in a separate compartment from other luggage. This is the most common way that chairs are damaged.
Also, when you arrive, put the chair through all it's paces (tilt, recline, elevation, slow/fast speeds, etc.) BEFORE leaving the gate area. If anything is found to be broken or not working correctly, file a report immediately with the airline, and also ask to speak to the airline's local compliance officer.