SERVICE LETTER #28
May 1, 1994
Sound Absorbing Kit P/N 69013.000
All Kitfox™ aircraft
using the Rotax 912 with the optional pre-sewn sound insulation material
installed on the firewall
keeping with SkyStar's policy of making important information available
to our customers, this service letter is issued as an advisory which
needs your attention.
has received reports that the P/N 69013.000 Sound Absorbing Kit
insulation has sustained heat damage to areas near the exhaust pipes and
the muffler on 912 engine installations.
recommends installation of a heat shield over the insulation located
near the exhaust system. Such a heat shield can be fabricated from
.020" thick 6061-T6 aluminum, and riveted directly to the firewall
with 1/8 x 3/16" SS rivets, so that the insulation is sandwiched
between the new aluminum heat shield and the firewall.
After installation of the heat shield, periodic inspection of the insulation should be performed, to ensure that no further heat damage has taken place.