MOONEY INTERNATIONAL CORPORATION
M20V SERVICE AND MAINTENANCE MANUAL
Page
Date
15
MAR 2017
Rev Date
51-13-04 - REAR SPAR REPAIR
The rear spar may be spliced between ribs in accor-
dance with AC 43.13- ( ) (Figure 51- 14).
REPLACE WITH SAME
7.40
CLAD
.040 2024- T3
5.9
4
4
CHANNEL
RIVETS ( ) IN
EXISTING HOLES
(5 EACH SIDE)
REAR SPAR REPAIR
FIGURE 51- 14
51-13-05 - RIB REPAIR
Replace ribs that are severely damaged. Minor dam-
age may be repaired as shown (Figure 51- 15).
51-13-06 - WING TIP REPAIR
To repair severe damage to wing tip outboard of STA
193.5, it is advisable to replace entire tip skin and rib.
1. Locate new tip rib in exact original tip rib position to
prevent wing tip twisting. Use temporary support or lo-
cator pins to maintain correct wing tip position.
2. Rivet new tip rib to main and rear spars.
3. Locate new skin, and drill rivet holes through skin
to match existing holes in ribs and stringers.
4. Rivet skin to rib at STA 193.5.
5. Roll skin back on lower wing surface to gain access
to stringers for rivet bucking. Rivet skin to upper string-
ers.
6. Rivet skin to tip rib starting at leading edge. Buck
rivets as far back as possible.
7. Install cherrylock (CR- 2248) blind rivets in places
inaccessible for rivet bucking. Add one extra counter-
sunk blind rivet between every other pair of cherrylock
rivets.
51-13-07 - WING SKIN PANEL REPAIR
Repair wing skin panels as prescribed in AC 43.13- ( ),
unless an entire skin panel is to be replaced. Install new
skin panels to exactly match original skin installation.
Preformed skin panels may be obtained from any
Mooney Service Center.
1. Damaged Dimple Repair Around Inspection
Holes. (Figure 51- 16) Repair damaged dimples
around inspection holes when: (a) there are three or
more cracked adjacent dimples, (b) the crack in one or
more of the dimples extends beyond radius of dimple
into skin and (c) when there are four or more cracked
dimples around an inspection hole.
4
EDGE OF REAR PIECE
REPAIR FLANGE
EDGE OF REPLACED
FORWARD PIECE
RIVETS
ORIGINAL
4
RIB REPAIR
FIGURE 51- 15
To repair damaged dimples (a) cut a doubler from same
material and gauge as skin to be repaired, (b) drill and
countersink 100- degree fastener holes in doubler to
match dimpled fastener holes in skin, and (c) install
doubler around inspection hole. Use AN426- AD4 riv-
ets when material is .040 inch thick or greater. Drill
holes using a No. 30 (.128 IN.) drill as shown in the
above illustration. Use AN426- AD3 rivets when mate-
rial is .032 inch thick or less. Drill holes using a No. 40
(.098 IN.) drill.
51-13-04
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