A
A
I
I
R
R
P
P
L
L
A
A
N
N
E
E
T
T
E
E
C
C
H
H
N
N
I
I
C
C
A
A
L
L
D
D
E
E
S
S
C
C
R
R
I
I
P
P
T
T
I
I
O
O
N
N
,
,
O
O
P
P
E
E
R
R
A
A
T
T
I
I
N
N
G
G
,
,
M
M
A
A
I
I
N
N
T
T
E
E
N
N
A
A
N
N
C
C
E
E
A
A
N
N
D
D
R
R
E
E
P
P
A
A
I
I
R
R
M
M
A
A
N
N
U
U
A
A
L
L
3-16
Document No.:
EV97SLNOEN
Date of Issue:
02/2008
Revision:
-
3.3 Leveling
Leveling is used to check the airframe alignment.
First set the aircraft in a horizontal position (use boards) according to leveling points. The leveling
points are the rivets on the aircraft which are (generaly) marked with red paint. The location of the
points is shown in the Leveling Record. Use the leveling points 1(3) and 2(4) to set the airplane in
a horizontal position in longitudinal direction, and leveling points 5 and 7 in lateral direction.
Boards, under the main or nosewheel, may be used to level the airplane. The best way to measure
a leveling point height is to use a level. Alternatively a running meter is sufficient for approximate
measurement.
Measured values should be recorded in the Leveling Record (see Appendices). Height differences
between corresponding leveling points have to be calculated. A check must than be carried out to
prove that any differences do not exceed the tolerances permitted in the Leveling Record.
If any difference exceeds the permitted tolerance, the aircraft assembly, plays in hinges and
eventual permanent deformations, should be inspected.
The aircraft manufacturer should be contacted in serious cases.
