TB 1-1520-237-25-2
Antenna Mounts (MH and HH/MH models): Examine antenna mounts for corrosion,
(f)
chafing, cracks, security, deteriorated sealant, and loose or missing fasteners.
2.2.3.6 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
damage (Figure 12).
Figure 12. MAIN ROTOR PYLON STRUCTURE
Frame: Open number 1 and 2 work platforms, and remove/open right and left oil cooler
(a)
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
(b)
fasteners, and condition of seals.
Oil Cooler Support Bracket: Examine the oil cooler support brackets for cracks, excessive
(c)
wear, interim repairs, loose or missing fasteners, and corrosion.
Forward Cover Tracks: Examine the forward cover tracks for excessive wear, cracks,
(d)
corrosion, and loose or missing fasteners.
Engine Supports: Inspect the area around the engine supports for cracks and corrosion.
(e)
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