APU STOPPING. - TM-55-4920-424-13-P0143

TM 55-4920-424-13&P

3-15. APU STOPPING.

a. Move START-RUN-OFF switch on instrument panel to OFF, (Reset APU Tester box switches to Down position if

installed)

b. Pull MAIN POWER and LOAD RELAY circuit breakers on instrument panel.

c. Disconnect battery.

WARNING

Exhaust duct and APU combustor section are hot during operation. Keep clear of

combustibles. Avoid physical contact to preclude personal injury. Do no remove

APU until it has sufficiently cooled.

3-16. APU REMOVAL.

a. Disconnect all APU tester cables at the control console.

b. Disconnect tester cables at the ESU and reconnect ESU cables.

c. Disconnect drain lines and fuel supply lines and install protective caps\plugs.

d. Disconnect starter\generator electrical leads.

e. Remove fuel control covering.

f. Remove clamp and auxiliary starter/generator.

g. Remove starter\generator mounting bracket by removing the nuts and washer.

h. Reinstall fuel control covering.

i. Remove oil sump line plug and reinstall fitting.

j. Remove check valve from the APU customer air outlet. Remove blank off disk check valve. Reinstall check valve

on air outlet.

k. Disconnect check stand control harness (P301) from harness receptacle on APU.

I. Connect a suitable hoist assembly, or equivalent for the removal of APU.

m. Remove all mounting bolts.

n. Remove APU from stand.

E-24 Change 2