Static Dischargers - Cessna 172SPHUSR05 Pilot Operating Handbook

S ECTION 7
&
AIRPLANE SYSTEMS D ESC R I PTION
To ensure audibility and clarity when transmitti ng with the
handheld m icrophone, always hold it as closely as possible
to the l ips, then key the microphone and speak d i rectly i nto
it. Avoid covering opening on back side of m icrophone for
opti m u m noise canceling.
STATIC D ISCHARG ER S
Static wicks (static d ischargers) are installed at various poi nts
thro ughout the airframe to reduce i nterference from precipitation
static. U nder so me severe static conditions, loss of radio signals is
possible even with static d ischargers installed. Whenever possible,
avoid known
dependable radio sig nals.
airspeed and anticipate temporary loss of radio signals wh ile i n
these areas.

Static dischargers

therefore, shou ld be checked periodically (at least at every annual
i nspection) by q ualified avionics tech n icians, etc.
7-48
NOTE
severe precipitation
If avoidance is i mpractical , m i n imize
lose their effectiveness with
MODEL 1 72S
areas to prevent loss of
C ESSNA
age, and
J u ly 8/98