Tecnam P2002 JF, Maintenance Manual

Page: 632 / 1289

Page 208 2
nd Edition – Rev 0
34-20
POSITION DETERMINING – MAINTENANCE PRACTICES
6
.
GPS ANTENNA REMOVAL/INSTALLATION
This procedure applies to GPS antenna.
Step
no.
Task description
Additional info &
References
1.
Make sure Master Switch is set to OFF
2.
Remove baggage compartment upper covers See Chapter 25
3.
Disconnect antenna cable
See
Figure 2
4.
Loosen self-locking nuts and remove washers
5.
Put the GPS antenna clear of the fuselage skin
6.
Make sure that the internal skin surface is not
painted in correspondence of the fixing bolts
Remove any interior paint in
the area where the fixing nuts
and washers are placed to
assure a good ground.
7.
Place antenna over mounting holes, using the
fours screw holes to align the antenna. Insert the
four screws. Make sure that GPS antenna is
fitted with the O-ring
Secure the O-ring in the O-ring
groove on the underside of the
antenna.
See
Figure 2
8.
Tighten nuts with washers: apply torque value of
12 to 15 in-lbs
Torque should be evenly
applied across all mounting
screws to avoid deformation of
the mounting area.
Insure that the antenna base and
aircraft skin are in continuous
contact with the O-ring.
Use new self-locking nuts.
9.
Connect antenna cable
See
Figure 2
10.
Perform COMM 2 antenna functional test