Mod. : 4890
ATR 42 Model : 400/500
GPS
LIMITATIONS
GLOBAL POSITIONING SYSTEM
P 1
NOV 99
150
2.01
.
07
GPS
1 - GENERAL
The GPS Bendix/King KLN90B/BRNAV :
-complies with TSO C 129,
-is installed in compliance with FAA AC 20-138
-has been demonstrated to meet the requirements of JAA TGL n
°
2,
REV1, and FAA AC 20-138 for European B-RNAV operations.
2 - LIMITATIONS
Compliance with the above regulations does not constitute an
operational approval/authorization to conduct operations. Aircraft
operators must apply to their Authority for such an approval/
authorization.
-The system must be used with an updated active data base and the
waypoints position must be cross-checked with official charts.
-The flight must be conducted in L-NAV mode, using the flight director in
manual mode or the autopilot.
-This equipment is approved for use as a VFR and IFR supplemental
navigation means, en route and in terminal area up to the Initial Approach
Fix (IAF).
-The system must not be used for approaches, beyond IAF.
-The CDI scale factor selectable in the MOD pages must not be set at the
0.3 NM full scale deflection value.
3 - PROCEDURES
-If the RAIM function is lost, the flight crew must cross-check the aircraft
position using conventional means or must revert to an alternative means
of navigation.
-The following procedures apply for B-RNAV operations:
(a) during the pre-flight planning phase, the availability of GPS integrity
(RAIM) must be confirmed for the intended flight (route and time).
Dispatch must not be made in the event of predicted continuous loss of
RAIM of more than 5 minutes for any part of the intended flight.
(b) Traditional navigation equipment must be selected to available aids
so as to allow immediate cross-checking or reversion in the event of loss
of GPS navigation capability.
AA
R
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AviationLearning.net
01/07//2018 REV 1 These notes are not revised after issue For Training Purposes Only
Page 563 of 764
