Antenna Mounts (MH and HH/MH models): Examine antenna mounts for corrosion,
chafing, cracks, security, deteriorated sealant, and loose or missing fasteners.
188.8.131.52 Main Rotor Pylon Section Evaluation: Discovery of cracks, excessive wear, or
corrosion in this area may require the removal of additional panels to determine the extent of
Figure 12. MAIN ROTOR PYLON STRUCTURE
Frame: Open number 1 and 2 work platforms, and remove/open right and left oil cooler
access panels, environmental control system access panel, auxiliary power unit access
panel, UHF/IFF antenna cover (if installed), and fire bottle access panel. Examine exposed
airframe for cracks, corrosion, excess wear, and loose or missing fasteners.
Firewall: Examine accessible areas of the
for cracks, corrosion, loose or missing
fasteners, and condition of seals.
Oil Cooler Support Bracket: Examine the oil cooler support brackets for cracks, excessive
wear, interim repairs, loose or missing fasteners, and corrosion.
Forward Cover Tracks: Examine the forward cover tracks for excessive wear, cracks,
corrosion, and loose or missing fasteners.
Engine Supports: Inspect the area around the engine supports for cracks and corrosion.