TM 1-1520-238-T-4
4–142
4–55.
ECS AIRFLOW PRESENT – WITH ENG START NO 1 SWITCH AT IGN OVRD (cont)
4–55
8. Detach wire from (A402)XK2–9/10–A2. Set and
hold ENG START NO 1 switch to IGN OVRD,
check for 28 VDC at (A402)XK2–9/10–A2.
Is voltage present?
YES
Replace relay (A402)K2–9 /10
(TM 1-1520-238-23).
NO
Refer to TM 1-1520-238-T-8 to
troubleshoot ECS shutoff valve.
END OF TASK
