There is a paragraph in the front of every single TO/JG that states that this book does not cover every single situation. There is also a MOI that discusses this. It usually states all panel, cowling, doors will either be completely installed or completely removed.
CONDITIONS NOT COVERED BY THIS MANUAL.
The instructions in this manual represent planned action for
conditions normally encountered during maintenance. It is
almost impossible to account for maintenance difficulties
that may be only occasionally encountered. Therefore, the
use of local decisions for general repair practices not involving
safety of flight is encouraged to avoid unnecessary delay
when coverage in the manual is incomplete. Any variation
from procedures shall be consistent with standard shop practices
and shall not detract from overall efficiency and operation
of the equipment.