MAINTNANCE MANUAL EXTRA 300/SC
PAGE DATE: 1. August 2014 CHAPTER 53
PAGE 16
4 Install bottom fuselage cover attachment screws.
5 Install bottom cowling attachment screws (one on either
side) without cowling present (see two outer circles in Fig-
ure 7).
6 Loosen clamp screws on gascolator drain and fuel pump vent
lines for easy access (see inner dotted circles).
7 Prepare PR-812 firewall sealant by mixing brown part A with
black part B with weight ratio 2.5:100.
8 Clean areas (from inside and outside) with solvents at four
positions pointed out by the arrows in Figure 7. Immedi-
ately thereafter, dry these areas with a new dry cloth.
9 At the gascolator drain (position A) seal the remaining gap
between firewall and bottom fuselage cover from inside and
outside with PR-812 firewall sealant. Minimum sealant
thickness approximately 1/8 inch (= 3 mm).
10 Repeat step 9 at positions B, C and D.
11 Refer to Chapter 20-10-10 for curing times.
12 Fasten clamp screws on gascolator drain and fuel pump vent
lines.
13 Remove the two bottom cowling attachment screws.
14 Reinstall main fuselage cover, landing gear cuffs and en-
gine cowling in accordance with this chapter.
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