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Slide sheets - 2 per side 4 Commercial
B. Procedure
Detail Steps/Work Items Key Items
(1) Make sure that the airplane is at the empty
weight.
See the adjustment report for the airplane.
(2) Roll the main wheels onto the slide sheets.
(3) Measure the Toe-in. Refer to Figure 2
(4) Measure the camber. Refer to Figure 2
WARNING: USE ONLY THE SHIMS LISTED FOR THE PURPOSE IN THE
AIRPLANE ILLUSTRATED PARTS CATALOG. OTHER SHIMS
COULD CAUSE LANDING GEAR FAILURE.
(5) If necessary, adjust the toe-in and/or
camber.
Refer to Chapter 06-00 for limits.
Maximum 2° shim per side (camber + toe).
See the illustrated parts catalog for the
correct shims.
Put shims between the strut and the axle.
These change the angle between the axle
and the airplane longitudinal or vertical
axis.
(6) Measure the wheel track. Across the airplane from the outermost
point on one axle to the outermost point on
the other axle.
(7) Roll the main wheels off the slide sheets.
Landing Gear
DA20-C1 AMM
Page 206
30 Oct 2008 32-10-00 Doc # DA201-C1
Rev. 14
Figure 2: Measure Toe-In And Camber
DA20-C1 AMM
Landing Gear
Doc # DA201-C1
Rev. 15 32-20-00 Page 1
30 Apr 2009
CHAPTER 32-20
NOSE LANDING GEAR
1. General
This Section gives you the data for the nose landing gear. It gives you the trouble-shooting and
maintenance practices. Refer to Chapter 32-40 for data for the nose wheel.
2. Description and Operation
The DA20-C1 has a fixed nose landing gear with a castoring wheel. The nose gear strut is a
welded tubular-steel component. The aft upper end has a transverse tube which holds the main
attachment journal-bearings. These journal-bearings allow the strut to move only up and down.
Forward and below the attachment bearing is a welded bracket which holds the bottom of the shock
absorber assembly. The upper end of the shock absorber assembly attaches to the engine mount.
The forward bottom end of the nose gear strut has a near-vertical pivot for the nose-wheel fork.
This lets the nose wheel caster. Stops limit the caster movement to ± 64°.
When the airplane is on the ground, the shock absorber assembly pushes up against the engine
mount. The journal-bearing pulls down against the front fuselage. When the airplane is flying, the
shock absorber assembly pulls down against the engine mount. And the journal-bearing pushes up
against the front fuselage.
The journal bearing keeps the nose gear strut aligned fore and aft. A side load on the nose wheel
causes it to caster. The stiffness (steering friction) of the nose-wheel fork pivot can be adjusted with
the nose-wheel fork mounting-screw. This prevents nose-wheel shimmy.
Landing Gear
DA20-C1 AMM
Page 2
30 Apr 2009 32-20-00 Doc # DA201-C1
Rev. 15
Figure 1: Nose Landing Gear
DA20-C1 AMM
Landing Gear
Doc # DA201-C1
Rev. 0 32-20-00 Page 101
19 Dec 1997
TROUBLE-SHOOTING
1. General
Use the data below to trouble-shoot the nose landing gear.
WARNING: YOU MUST DO A HARD LANDING CHECK AFTER A HARD LANDING.
HARD LANDINGS CAN CAUSE DAMAGE TO THE STRUCTURE AS
WELL AS THE LANDING GEAR.
Complaint Possible Cause Remedy
Strut bent. Hard landing. Do a hard landing check.
Refer to Chapter 05-50.
Replace the strut.
Nose-wheel shimmy. Steering friction too low. Adjust the nose-wheel fork
mounting-screw.
Landing Gear
DA20-C1 AMM
Page 102
19 Dec 1997 32-20-00 Doc # DA201-C1
Rev. 0
Intentionally left blank
DA20-C1 AMM
Landing Gear
Doc # DA201-C1
Rev. 15 32-20-00 Page 201
30 Apr 2009
MAINTENANCE PRACTICES
1. General
These maintenance practices tell you how to remove, install and adjust the nose landing gear.
Refer to the manufacturer for further data.
2. Remove/Install the Nose Landing Gear Strut
A. Equipment
Item Quantity Reference
Padded trestle 1 Commercial
Weight and strap 1 Commercial
B. Remove the Nose Landing Gear Strut
Detail Steps/Work Items Key Items
(1) Use weights to hold the rear fuselage down
with the nose wheel clear of the ground.
Use a strap around the rear fuselage.
(2) Put a padded trestle under the front fuselage
just aft of the nose gear mounting.
(3) Remove the engine cowling. Refer to Chapter 71-10
(4) Disconnect the shock absorber assembly
from the engine nose landing gear strut as
follows:
− Remove the rivets. Discard the rivets
− Remove the two clip retainers
− Remove the strut pins.
Refer to Figure 1
Use a slide hammer to remove the strut
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钻石20系列AMM 2(3)
