Those dreaded words
“A) Gain access to part.”
AKA - dismantle 25% of the airframe, remove 4 or 5 other parts plus associated wiring harness and hoses. Be prepared to work upside down and backwards in total darkness in an unventilated, claustrophobic space covered in grease and hydraulic fluid, reeking of fuel, oil, and lavatory fluids.
Then discover, after an hour or two, that the cure for the snag lays elsewhere and can easily be rectified in 5 minutes or less by replacing a switch, or the person operating same.
For giggles this should be done at night at -35C with 40Kt wind under blizzard conditions in an area frequented by famished Polar Bears or under a blazing sun on a snake infested jungle strip at +40C during a dust storm or tropical rainstorm of biblical proportions.