The HI FLOW switch/indicator, located be-
neath the PACK S/I, signals the pack bi-level
valve to go to a full open position. When HI
FLOW is selected, the ECS PRSOVs open fur-
ther, also increasing total airflow from the en-
gines. The normal position is OFF with no
legend in the HI FLOW switch. When selected,
“ON” illuminates in the S/I and a white “PACK
HI FLOW” message is posted on the CAS.
Activation of HI FLOW requires 28 VDC
through the PACK circuit breaker.
9-14
FOR TRAINING PURPOSES ONLY
LEARJET 45 PILOT TRAINING MANUAL
FlightSafety
international
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