Tecnam P2002 Sierra - Datum; Nominal Distances

P2002 Sierra SECTION B
MAINTEN ANC E MAN UAL pag. B-7
2
st
Edition, April 22
th
, 2008
INSPECTION & SERVICING
6.1 DATUM
• A & A’ – On the wing upper surface, is the rivet shared between
the main spar’s and the composite wing tip rivet lines (of the two
tip rivet lines, we are referring to the external one).
• B – The reference pointed in Figure B-4 on the top of the propeller
reduction gearbox. To get the access it is necessary to remove the
engine’s upper cowling.
• C & C’ – On the stabilator upper surface, is the rivet shared be-
tween the composite tip and the tubular spar rivet lines.
• D & D’ – On the fin’s skin is the upper/aft rivet. It shared between
the upper rib and the rear spar rivet lines.
6.2 NOMINAL DISTANCES
The aim of the alignment control is mainly to compare the measures taken
on both sides and to check if the difference between them, if any, is within
the tolerances reported below.
Datum Nominal distances (mm)
A - B 4360
± 20
A’- B 4360
± 20
A - C 4685
± 20
A’- C’ 4685
± 20
C - D 1810
± 10
C’- D’ 1810
± 10