Battery switch is on when using external power. Battery must be installed when using external power. The alternator bulbs can be tested with the Press to Test. Avoid extended use of the landing light while on the ground. The power pin of the external power receptacle is connected directly to the battery and will short out the battery if grounded.
Aircraft has negative ground so use only negatively grounded power cart.
C.H. is in for go-around. Tiedown lugs are weak. Tiedown rope must be nylon. Tie down nose when possible. Do not descend without some power.