All requirements according to the rules are met so why?
'Regimental or brigade sized Airborne type combat units with an average experience level of at least forty can be airdropped into any hex vacant of enemy units that is within 8 hexes of a supplied friendly unit. The eligible airborne combat unit must have at least one movement point remaining and be located in the same hex as a staging airbase unit (16.1.3). The airdrop mission can be conducted only by transport air group units with aircraft that have a maximum load rating (5.4.18) of at least 2000, further, the number of 'Max Sorties' must at least equal the number of 'Required Sorties' for the air group units selected to conduct the mission as displayed in the 'Pick Air Units for Mission' window. The mission can be escorted by fighter air group units. (5.3.9.3). '
The target hex was selected for a test.
