TM 9-6115-664-13&P
Section I. LUBRICATION INSTRUCTIONS
3-1. LUBRICATION INSTRUCTIONS.
Operator level lubrication instructions for the APU are contained in Appendix F of this TM. All lubrication
instructions are mandatory.
Section II. OPERATOR TROUBLESHOOTING PROCEDURES
3-2. GENERAL.
This section contains operator troubleshooting information and tests for the APU. Troubleshooting logic trees will
aide in locating and correcting minor APU malfunctions. Each malfunction or trouble symptom is addressed and is
followed by a series of inspections or tests necessary to determine the probable cause and corrective action.
3-3. TROUBLESHOOTING.
a.
This chapter does not list all possible malfunctions that may occur, all tests or inspections that may be performed,
or all corrective actions for each malfunction. Only those checks and tests authorized for the operator level are covered.
If a malfunction is not listed, or is not remedied by corrective actions, notify personnel at a higher maintenance level.
b.
If a malfunction or failure occurs during operation or performance check, perform troubleshooting in accordance
with logic tree diagrams. Refer to Table 3-1, Malfunction Index, for determining applicable troubleshooting procedure.
Table 3-1. Malfunction Index
Table
MALFUNCTIONS
Engine will not crank (local control panel operation)
3-2
Engine will not crank (remote control panel operation)
3-3
Engine cranks but will not start
3-4
Engine starts and stops
3-5
Engine overheats, high temperature light (LED) illuminates
3-6
Low oil pressure light (LED) illuminates
3-7
APU runs but does not charge
3-8
Engine emits white smoke
3-9
3-2
