CSP–520N–1
MD 520N (500N) ROTORCRAFT FLIGHT MANUAL
R
Revision 2
7–16
FAA Approved
7–13. CLEANING AIRCRAFT EXTERIOR AND ROTOR BLADES
Use care to prevent scratching of aluminium skin when cleaning
main rotor blades. Never use volatile solvents or abrasive materials.
Never apply bending loads to blades or blade tabs during cleaning.
Wash helicopter exterior, including fiberglass and composite components and
rotor blades, when necessary, using a solution of clean water and mild soap.
NOTE
:
Avoid directing soapy or clean water concentrations toward engine air intake
area and instrument static ports.
Clean surface stained with fuel or oil by wiping with soft cloth dampened by
solvent, followed by washing with clean water and mild soap.
Rinse washed areas with water and dry with soft cloth.
7–14. CLEANING – CANOPY AND DOOR TRANSPARENT PLASTIC
Clean outside surfaces of plastic by rinsing with clean water and rubbing light(
ly with palm of hand.
Use mild soap and water solution or aircraft type plastic cleaner to remove oil
spots and similar residue.
Never attempt to dry plastic panels with cloth. To do so causes
any abrasive particles lying on plastic to scratch or dull surface.
Wiping with dry cloth also builds up an electrostatic charge that
attracts dust particles from air.
After dirt is removed from surface of plastic, rinse with clean water and let air
dry or dry with soft, damp chamois.
Clean inside surfaces of plastic panels by using aircraft type plastic cleaner
and tissue quality paper towels.
7–15. FLUID LEAK ANALYSIS
Main rotor or aft transmission oil leak:
Oil leakage, seepage or capillary wetting at oil seals or assembly joint lines
of main rotor or aft transmission are permissible if leakage rate does not
exceed 2cc per hour (one drop per minute).
An acceptable alternate rate of leakage from either transmission is if oil
loss is not more than from full to the add mark on sight gauge within 25
flight hours.
CAUTION
CAUTION
