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The static moment is (M = m * r) where the value of (m) is measured with a spring scale opposite to
the balancing weight. And (r) is the lever arm, the distance between the hinge line and the point
where (m) was measured.
If the values are more than the limit in the Adjustment Report, you must ask the manufacturer for
advice before you adjust the balancing weight.
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CHAPTER 07
LIFTING AND SHORING
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TABLE OF CONTENTS
CHAPTER 07-00 LIFTING AND SHORING .............................................................................................1
1. General .............................................................................................................................1
CHAPTER 07-10 JACKING............................................................................................................1
1. General .............................................................................................................................1
2. Lifting The Airplane On Jacks...........................................................................................1
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CHAPTER 07-00
LIFTING AND SHORING
1. General
The DA20-C1 is a light airplane. It has no hoisting points. Use belts to lift the airplane.
You can use your hands to lift the wings and the horizontal stabilizer.
The DA20-C1 has 2 jacking points and a tail support. For maintenance lift the fuselage with the 2
hydraulic jacks. Use the special former to hold the rear fuselage.
Chapter 07-10 tells you how to lift the airplane with jacks.
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CHAPTER 07-10
JACKING
1. General
The DA20-C1 has 2 jacking points. They are located under the fuselage at the root ribs . To
support the rear fuselage a trestle with a former is positioned in front of the tail skid.
WARNING: IF THE WIND SPEED IS MORE THAN 10 KM/HR (6 KNOTS), DO NOT
LIFT THE AIRPLANE ON JACKS IN THE OPEN.
2. Lifting The Airplane On Jacks
A. Equipment.
Items Quantity Part Number
Airplane jacks 2 Commercial
Hold-down strap or weighted belt 1 Commercial
Tail trestle 1 Commercial
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Figure 1: Lifting The Airplane On Jacks
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B. Procedure.
Detail Steps/Work Items Key Items
(1) If the airplane is in the open, then align the
airplane into wind. The tail hold-down point
must be over a hold-down or mooring
attachment in the ground.
Maximum wind speed 10 KM/hr (6 knots).
(2) Apply the parking brake.
Put chocks under the main wheels.
(3) Put the tail trestle into position under the
fuselage.
In front of the tail skid.
(4) Put the hold-down strap in position on the
rear fuselage.
(5) Put the 2 jacks in position under the jacking
points. Extend the jacks to engage with the
jacking plates.
(6) Remove the chocks and release the parking
brake.
(7) Extend the jacks until the wheels are clear of
the ground.
Operate the jacks together to keep the
airplane level.
(8) Tie the tail down with the hold down strap. If you do not have a mooring point in the
ground, you can attach a heavy weight to
the strap.
C. Lowering The Airplane.
Detail Steps/Work Items Key Items
WARNING: MAKE SURE THE AREA UNDER THE AIRPLANE IS CLEAR
BEFORE YOU LOWER THE AIRPLANE OFF JACKS.
(1) Release the hold-down strap.
(2) Remove the trestle from under the rear
fuselage.
(3) Retract the jacks until the wheels are on the
ground.
Retract the jacks at the same time.
(4) Apply the parking brake. Put chocks under
　
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