AGO/AASTO field service, 98/99 summer season:
AGO1:  Failed—ice blockage.
AGO2:  Failed—TEG short circuit
AGO3:  Failed—exhaust stack ice blockage
AGO4:  Failed—ran out of fuel
AGO5:  Failed—exhaust stack ice blockage
AGO6:  Failed—computer fault
AASTO:  Failed—freon leak plus ice blockage