Operators using the new joystick controls will be able to use a yellow proportional thumb switch to control the variable-flow auxiliary hydraulic pump
The re-inspections at American and Delta stemmed from a 2006 order for airlines to ensure that wiring for an auxiliary hydraulic pump
was properly installed and secured to minimize risks for electrical shorts that could spark a fire.
This AD would require repetitive inspections of the number 1 and 2 electric motors of the auxiliary hydraulic pump
for electrical resistance, continuity, mechanical rotation and associated wiring resistance/voltage; and corrective actions if necessary.