Mooney M20TN, Service And Maintenance Manual

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MOONEY AVIATION COMPANY, INC.
M20TN SERVICE & MAINTENANCE MANUAL
Date
2006
Rev Date
Page 5
52--00--00 -- GENERAL
The cabin door is constructed of an inner and outer alu-
minum shell fastened together by rivets. It is provided
with single operation dual latching mechanisms, 1) a
lock pin extends into a mating receptacle in lower door
frame, and 2) a jaw type latch clamps a special de-
signed nut in upper door frame to hold door securely in
place. The door is hinged at the forward edge by an ex-
truded, aluminum hinge. A guide pin is in door assem-
bly to assist in holding door tightly shut at forward, up-
per door area. The inner and outer handle are
interconnected by adjustable push--pull tubes. This
mechanism is spring loaded to an over center position
in the latched position for positive security. Adjustment
for each push--pull tube is provided to accurately rig
latching pin and jaw type latch. Adjustment to the spe-
cial nut at the top of door frame can be made for proper
closure.
The baggage compartment door is constructed of an
inner and outer aluminum shell fastened together by
rivets. It has dual pin latches that extend into receptacle
fittings on both sides of the door frame when exterior
handle is closed properly.
The auxiliary exit handle is located inside baggage
door. This handle can be operated from inside even if
outer handle is locked. A cam mechanism allows a cle-
vis pin to bypass outer handle latch groove and open
the two latching pins which hold baggage door closed.
(Refer to POH/AFM Section III for specific procedures
to operate auxiliary exit handle.) This door is hinged at
the top with an extruded piano type hinge.
Hold open arms are attached on doors to assist in hold-
ing doors open.
A door lock is provided for both doors. A single key will
operate either door lock. Interior panels require remov-
al if door locks are to be removed and replaced.
52--10--00 -- CABIN DOOR – MAINTENANCE
PRACTICES
1. Removal. The cabin door may be removed to re-
place or repair door or to replace a damaged hinge.
A. Remove interior panel around forward door
frame.
B. Remove hold open arm at door frame. Remove
cotter pin and washers from hold open arm shaft. Pull
shaft up from doubler plate and clear of door frame.
C. Remove eight (8) screws from outside airplane
that hold front portion of hinge in place. There are also
three (3) flush rivets that will require removal at this
location (Figure 52--1).
D. Carefully drill center of rivet head with a 1/8th
inch drill bit until head pops off and rivet stem can be
punched out.
The original door assembly, with hinge attached, is as-
sembled to door frame prior to installation of outer skin.
The door is placed into position and hinge held in place
on its mounting plate by sealant and locator rivets. (The
number of locator rivets may vary). These rivets will be
underneath outer skin. After removal of outer rivets and
screws, work a putty knife or a thin piece of aluminum
between outer skin and hinge and between hinge and
mounting plate from inside in order to break sealant
bond. During this procedure determination can be
made where locator rivets are positioned. Locate these
rivets from inside and drill bucked head(s) carefully. DO
NOT DRILL THROUGH OUTER SKIN. Attempt to
move door and hinge aft and away from attach point af-
ter each rivet stem is drilled out. The door and hinge
should come free when all sealant bond and rivets are
removed.
RIVET
SCREWS (8)
RIVET
DOOR
HINGE
R52--1
CABIN DOOR ATTACHING HARDWARE
FIGURE 52--1
2. Door Repair.
A. The door should be repaired, if applicable, ac-
cording to standard procedures in AC 43.13--1B CHG
1.
B. Remove interior door panel, if necessary, to re-
pair door assembly.
3. Installation.
OLD DOOR -- Old door can be relocated by using exist-
ing holes. Mounting plate should be thoroughly
cleaned of all sealant and foreign material before rein-
stallation of door.
52--00--00