Technical data

13773-001
21-20
Page 1
AIR DISTRIBUTION SYSTEM
1. DESCRIPTION
This section covers the servicing procedures for the integral fresh air inlets, fresh air ducts, and eyeball
vents. Fresh air vents are located along the sidewall near each rear passenger seat and directly forward of
the pilot and co-pilot seats. One integral fresh air inlet is located on the forward side of each wing. Fresh
ram air flows through the fresh air inlets and into the cabin. A screen in the wing inlet duct prevents large
objects from entering the fresh air system. The inlet screens should be inspected periodically for obstruc-
tions.
2. MAINTENANCE PRACTICES
A. Eyeball Outlets
(1) Removal - Bolster Panel Eyeball Air Vent
(a) Remove bolster panel to gain access to back side of eyeball air vent. (Refer to 25-10)
(b) Remove vent assembly from the eyeball air vent.
(c) Remove eyeball vent.
(2) Installation - Bolster Panel Eyeball Air Vent
(a) Insert outlet into bolster panel.
(b) Secure vent assembly to the eyeball air vent.
(c) Place bolster panel into position and secure. (Refer to 25-10)
(3) Removal - Armrest Eyeball Air Vent
(a) Remove armrest interior trim panel and disconnect passenger fresh air duct from vent.
(Refer to 25-10)
CAUTION: Use care when drilling out old rivets to prevent protruding through leather
interior panel.
(b) Drill out rivets securing armrest assembly to interior trim panel.
(c) Remove retaining nut hose assembly and o-ring from vent.
(d) Remove vent.
(4) Installation - Armrest Eyeball Air Vent
(a) Insert vent into interior trim panel.
(b) Place o-ring over back side of vent.
(c) Secure vent with retaining nut hose assembly.
(d) Secure armrest assembly to interior trim panel with rivets.
(e) Place armrest interior trim panel into position, secure fresh air duct to vent, and secure
panel. (Refer to 25-10)
30 Nov 2000