Helicopter parking shall be in accordance with local direc-
tives and the following minimum procedures: station heli-
copter on as level a surface as possible; set wheel brakes;
lock tail wheel; turn all switches off; disconnect external
power; chock wheels; secure rotor blades; attach static
ground wire, and install engine inlet, exhaust, and pitot
2.55.1 Protective Covers.
Protective covers (fig 2-47)
prevent damage from foreign objects and snow and water
buildup to vital areas. All protective covers are part of the
helicopter flyaway kit. The kit may be stored in the equip-
ment stowage bay during flight. Covers are installed
whenever the helicopter is on the ground for an extended
period of time, or if severe environmental conditions such
as ice or dust exist.
2.56 GROUND AIR SOURCE.
An external air receptacle (fig 2-46) under the No. 1 en-
gine nacelle provides an attachment point for an external
air line to start either engine or accomplish maintenance
functions on the helicopter. An external air source that
provides 40 psig and 30 pounds-per-minute air flow is re-
quired to pressurize the system for engine start. The max-
imum pressure from a ground source shall not exceed
The helicopter is towed by attaching a tow bar to the tail
wheel fork. Towing the helicopter must be accomplished
by trained personnel in accordance with instructions in
2.58 CANOPY AND WINDSHIELD CLEANING.
Do not attempt to clean either the PNVS
or TADS turret windows or optics. These
require special treatment by trained per-
The canopy and windshield shall be carefully cleaned, us-
ing aircraft cleaning practices, with clear water and a
moist chamois or flannel cloth.
The helicopter is moored in accordance with
Ground Air Source