Extra 300/SC - Page 349

CHAPTER 61
PAGE 7
MAINTENANCE MANUAL EXTRA 300/SC
PAGE DATE: 1. August 2014
clamp sheets and contained plastic guidance from the en-
gine baffle.
10 Remove 2 bolts of the clamp sheet attachment positioned
at the firewall break through (10). Disconnect clamp sheet
and contained plastic guidance from the rear side of the
firewall.
11 Mark vernier control cable routing and remove the self-
clinching plastic tiedown straps in the cabin area.
12 Remove attachment nut (9) and washer of the vernier con-
trol unit (7).
13 To remove vernier control unit from its bracket, pull the
unit slightly aft (about 15cm [0.5ft]) and then to the RH in-
side direction.
14 Pull complete vernier control cable (6) aft to remove from
aircraft. Secure clamp sheets.
Installation
Install in reverse sequence of removal observing the follow-
ing items:
1 Thread the respective clamp sheets and plastic guidance on
the vernier control cable before penetrating the firewall and
the rear engine baffle.
2 Install rod end to the vernier control cable terminal. Ensure
thread of control cable terminal is visible in the inspection
hole.
3 Renew the sealing of the firewall break through at the en-
gine side of the firewall. Use PRC-812 (Products Research
& Chemical Corp., USA) firewall sealant.
4 Tighten the castle nut slightly. Ensure movability of gover-
nor control lever (2).
Rigging
1 Move vernier control knob (8, Figure 2) to the foremost
position.
2 Check that the travel stop at the governor control lever is
reached, and the over-travel of 5mm [3/16"] (tolerance +/-1