Cessna 150M - Cabin Door Latches; Lock; Auxiliary; Cabin Upholstery

3-24. CABIN DOOR LATCHES. (Refer to figure
3-4. )
3-25. DESCRIPTION. The cabin door latch utilizes
a rotary clutch for positive bolt engagement. As
door is closed, teeth on underside of bolt engage gear
teeth on clutch. The clutch gear rotates in one direc-
tion only and holds door closed. Flush-mounted out-
'"' side and inside door handles are used to actuate door
latches.
3-26. ADJUSTMENT. Adjustment of latch or clutch
cover is afforded by oversize and/or slotted holes.
This adjustment ensures sufficient gear-to-bolt en-
gagement and proper alignment.
NOTE
Lubricate door latch per Section 2. No lu-
brication is recommended for rotary clutch.
3-27. LOCK. In addition to an interior lock, a cylin-
der and key type lock is installed on left door. If
lo.ck is to be replaced, the new one may be modi-
fied to accept original key. This is desirable, as
the same key is used for ignition switch and cabin
door lock. After removing old lock from door, pro-
ceed as follows:
a. Remove lock cylinder from new housing.
b. Insert original key into new cylinder and file off
any
protruding tumblers flush with cylinder. Without
removing key, check that cylinder rotates freely in
hOusing.
c. Install lock assembly in door and check lock
operation with door open.
d.
Destroy new key and disregard code number on
cylinder.
3-28. SEATS. (Refer to figure 3-5 and 3-6.)
3-29. PILOT AND COPILOT.
A. ADJUSTABLE BACK/STATIONARY BOT-
TOM.
B. RECLINING
BACK/FORE-AND-AFT
ADJUSTABLE BOTTOM.
I
C. RECLINING BACK/FORE AND AFT AND
VERTICALLY ADJUSTABLE BOTTOM.
3-30. DESCRIPTION. The standard pilot and co-
pilot seat is comprised of an adjustable double-width
seat back and two stationary single-width seat bot-
toms thru 1972 models. Beginning with 1973 models
the standard and optional seats are individual seats
for the pilot and copilot positions. The seats adjust
fore and aft on seat rails and the backs are two
position adjustable. Beginning with 1976 Models,
optional pilot and copilot seats feature a fore and
aft adjustment plus a 3 position vertical adjustment.
NOTE
The vertically adjustable seat is spring
loaded to the high position and is adjusted
upward with no weight on the seat.
Stops are provided to limit the travel on fore and aft
adjustable seats.
3-31. REMOVAL AND INSTALLATION.
(Standard seat thru 1972 models).
a. Unlatch top of seat back, release spring-l.oaded
pins at bottom of seat back and remove from aircraft.
b. Pivot seat bottoms forward and lift up to free
pins from cabin floor.
(Standard and optional seats beginning with 1973).
c. Remove seat stops from rails.
d. Slide seat fore-and-aft to disengage seat rollers
from rails and lift seat out.
e. Reverse preceding steps for installation. En-
sure all seat stops are reinstalled.
IWARNING'
It is extremely important that seat stops
are installed, since acceleration and de-
celeration could possibly permit seat to
become disengaged from seat rails and
create a hazardous situation, especially
during take-off and landing.
3-32. AUXILIARY.
3-33. DESCRIPTION. The double-width auxiliary
seat is permanently bolted to the cabin structure and
offers no adjustment provisions. The seat structure
is mounted on hinge brackets with pivot bolts, thus
allowing seat to be pivoted upward for more baggage
area.
3-34. REMOVAL AND INSTALLATION.
a. Remove bolts securing seat structure to hinge
brackets.
b. Unsnap seat back from aft cabin wall.
c. Lift seat out.
d.
Reverse preceding steps for installation.
3-35. REPAIR. Replacement of defective parts is
recommended in repair of seats. However, a
cracked framework may be welded, provided crack
is not in an area of stress concentration (close to a
hinge
or bearing point). The square-tube framework
is 6061 aluminum, heat-treated to a T-6 condition.
Use a heliarc weld on these seats, as torch welds
will destroy heat-treatment of frame structure.
3-36. CABIN UPHOLSTERY. Due to the wide selec-
tion of fabrics, styles and colors, it is impossible to
depict each particular type of upholstery. The fol-
lowing paragraphs describe general procedures which
will serve as a guide in removal and replacement of
upholstery. Major work, if possible, should be done
by
an experienced mechanic. If work must be done
by a
mechanic unfamiliar with upholstery practices,
the mechanic should make careful notes during re-
moval of each item, to facilitate its replacement later.
3-37. MATERIALS AND TOOLS. Materials and
tools will vary with job. Scissors for trimming up-
holstery to size and a dull-bladed putty knife for
wedging material beneath retainer strips are the
only tools required for most trim work. Use in-
dustrial rubber cement to hold soundproofing mats
and fabric edges in place. Refer to Section 18 for
thermo-plastic repairs.
Change 3 3-7