When the on-board microwave is in use, several operators have reported to Duncan Aviation avionics techs an intermittent interruption in Wi-Fi service while using laptops or personal electronic devices (PED), such as BlackBerrys or iPhones.
I just helped out an operator with a cabin door binding issue who was in a very cold part of the country where the aircraft sat for five days in the freezing rain, sleet and snow.
Warm aircraft are more susceptible to snow and rain which can freeze in the engine inlet area.