If the semitrailer is coupled to tractor, do not attempt to adjust the gooseneck or
damage to equipment may result.
a. Start APU (para. 2-16). Make sure APU throttle control is pulled completely out and APU is running at full speed.
If gooseneck needs adjusting, verify that the front support legs are lowered and
supporting the platform or injury to personnel may result.
b. Verify that front support legs are lowered and supporting platform (para. 2-22).
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