. SECTION III
OPERATING INSTRUCTIONS
3-1. GENERAL.
3-2. The Mobile Check Stand is a control unit providing a mounting platform, electri-
cal controls, and components necessary for operating the models T-62T-2 and
T-62T-2A auxiliary power units. The check stand, independent of the APU, cannot
be turned on or off. Its components function only as a part of the power unit. The
starting and stopping procedures given in this section are for the purpose of operating
the auxiliary power unit, either for testing the APU, or for furnishing external ac
power to the aircraft.
3-3. MOUNTING THE APU ON THE CHECK STAND.
3-4. To mount the APU on the check stand, remove the following APU components:
blanket retaining band, combustor blanket assembly, blanket gasket, exhaust duct,
and thermocouple boss cap. Refer to TM 55-1520-209-20 or -35 for removal proce-
dures for these APU components.
CAUTION
Place removed APU components in a safe place to prevent
loss. These parts will be reinstalled on the APU after
removal of the unit from the check stand.
a . Preparation.
(1) Position the check stand and set the hand brake (pull brake handle up).
(2) Prepare the stand, battery, speed increaser, and the fuel system for use.
Refer to Section II for the preparation procedures.
(3) Remove the metal cover from the rear pad on the speed increaser. Save
the nuts and washers for use in attaching the APU to the speed increaser.
3-1
