TM 1-1520-238-MTF
2-89
Change 1
PROCEDURE
TROUBLESHOOTING
REFERENCE
ENGINE SHUTDOWN
**1. TAIL WHEEL switch – LOCK.
**2. PARK BRAKE – Set.
**3. APU – Start as required
**4. HARS switch – NORM. Verify ASE
switches disengage.
5. BBC check – Check as required.
a. Manual switchover.
(1) MUX switch – SEC.
(2) Note system operation.
(3) MUX switch – PRI.
(4) Note system operation.
b. FCC DC circuit breaker open.
(1) Note system operation.
(2) Note PRI MUX caution/warning
segment illuminates.
(3) MUX switch – SEC.
(4) Note PRI MUX caution/warning
segment extinguish.
A15
