LTL TATM LTL - Vol 1
Issue 1.0
32
Helium Venting Procedures – Sheet 2
RECORD OPEN TIME (INDICATOR ‘ON’ TO ‘OFF’) IN SECONDS
RECORD NEW (REDUCED) FREELIFT
WAIT FOR FAN TO FILL BALLONET
REPEAT VENTING PROCEDURE UNTIL TARGET FREELIFT ACHIEVED
LOW MOOR BALLOON
MEASURE (INCREASED) BALLONET HEIGHT AND RECORD
*
EMERGENCY VALVE CLOSURE
IF VALVE DOES NOT CLOSE:
RED INDICATOR REMAINS ‘ON’
ARM EMERGENCY BOX ON TOP OF CONTROL BOX
SWITCH ARMING SWITCH UP TO ‘ON’
PUSH RED CLOSE BUTTON
This bypasses the control box systems.
CONFIRM RED VALVE OPEN INDICATOR ‘OFF’