Table 2-1. Operator/Crew Preventive Maintenance Checks and Services
ITEM TO BE INSPECTED
is not ready/
APU CONTROL BOX
Controls fail to operate
a. Inspect APU control box (18) for secure mounting and
or APU does not start.
corrosion. Ensure APU throttle control (19) and
START switch (20) operate properly without binding or
sticking. START switch (20) should return to OFF
position when released from GLOW or START
position. Ensure throttle is pushed in and START
Use eye and ear protection and protective
gloves when inspecting the APU while it is
running or serious injury to personnel could
result from moving parts, excessive noise
level, and engine heat.
When checking for leaks, never open any type
of fluid holding tanks during operation or while
under pressure or severe burns from the
spraying of hot fluids may result.
b. With APU running, check for unusual noises,
Any Class III leaks,
excessive or discolored exhaust smoke, or fluid leaks
from APU. Check for APU coolant, fuel, oil, and
hydraulic leaks. Ensure APU responds to throttle
control. Leave APU running.
Change 1 2-27