PURGING OF FUEL TANK WITH AIR
If heater and plenum chamber are
used with blower, start heater before
connecting heater duct to plenum
Do not shut off air flow while air duct
is attached to helicopter.
If power fails, remove duct and blower
from area until normal air flow is
Open pod access panel (10) for the tank being
purged (Task 2-2).
Position and ground air blower (11).
Start blower (11) and air mover (2).
Connect duct (12) to blower.
Connect duct ground receptacle (13) to aircraft
Position duct (12) to blow air at 45º angle across
tank access door (15).
Remove tank access door (15), forward tank
(Task 10-69), main tank (Task 10-51 or 10-53),
and aft tank (Task 10-79).
Position duct (12) to blow into fuel tank (16)
through access hole (15). Maintain use of air
mover if working inside fuel cell.
After 15 minutes remove air duct (12) from fuel
tank down and remove air blower (10).
Test purged tank. Use a combustible gas
indicator. If level of fumes is still dangerous,
purge until level is safe.
Close supply valve (3). Remove air mover (2).
Disconnect ground receptacle (6).