EN-1320
OPERATION AND INSTALLATION MANUAL
6.8. LIGHTNING STRIKE
Lightning strike damage usually looks like a small burn marks or pitting, with signs of blistering
and melting. As a result of lightning strike, the part should be chipped, jagged or material
should be missed, with discoloration and melting in place where the piece broke off. Lightning
strike damage to the spinner dome may looks like a small burn holes in the surface.
In the event of a propeller lightning strike, an inspection is required before further flight. It may
be permissible for a propeller to be operated for an additional 10 hours of operation if following
inspection is performed:
a) Remove the spinner dome and visually inspect the propeller, spinner and de-icing system for
damage that would require repair before flight (such as broken de-icing wires or arcing
damage to the propeller hub).
b) Inspect the propeller blades for damage caused by the lightning strike. If only minor burn
marks are evident, then 10 hours of operation is acceptable before removal from engine and
inspection
c) Check operation of the propeller de-icing system.
d) Regardless of the degree of damage, make a log book entry to document the lightning strike.
CAUTION:
Regardless of the outcome of the inspection, after 10 additional hours the propeller must be
sent to the manufacturer or authorized service centre for proper inspection.
6.9. FOREIGN OBJECT STRIKE
Foreign object strike is any event whether or not the engine is operating, when the propeller
comes into contact with anything other than air resulting in visible damage of the propeller
blades. Only minor damage from stones during normal propeller operation may not be
considered as foreign object stike.
A foreign object strike can cause a broad spectrum of damage. It is no possible to detect the
extent of damage inside the hub without its disassembly.
Any foreign object strike event resulting in visible damage of the blades except minor stone
nicks requires overhaul at manufacturer or authorized service centre.
6.10.
EXPOSURE TO FIRE OR HEAT
Exposure to fire or extreme heat requires the inspection of the propeller and engine mounted
accessories manufactured by Avia at manufacturer or authorized service centre.
6.11. ENGINE OIL CONTAMINATION
Engine oil contamination requires the inspection of the propeller and engine mounted
accessories manufactured by Avia at manufacturer or authorized service centre.
6.12. HARD LANDING
The hard landing occurs when the airplane hits the ground with a greater speed and force than
usual, with no contact of the propeller with the ground.
a) The hard landing within the load limit of the airplane does not require any action on the
propeller.
b) The hard landing above the load limit of the airplane requires inspection of the propeller in
Avia Propeller or authorized repair center.
61-10-20
INSPECTIONS
Page 6-14
2017-10-06
