GOL 737-8, Руководство по эксплуатации

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B-10 Page 2 of 8 MN-FLT-OH-201
Flight Crew Operations Manual Bulletin No. GOT-10 , Dated August 20, 2018 (continued)
737 MAX airplanes with I-ADIRU part number HG2050BC04 that have been
connected to the Multi-Mode Receiver (MMR) are capable of automatically
accepting GPS position for IRS initializations (i.e. full alignment, Fast
Realignment, and post-flight ANR mode).
Note: Position entered by the flight crew has priority over automatically
accepted GPS position data. Once initialized, whether automatically by
GPS or manually by the flight crew, GPS position is no longer
automatically accepted by the I-ADIRU until after a flight is
completed.
The FMC receives latitude, longitude and ground speed inputs from the I-
ADIRU and uses this data to calculate its own FMC ground speed, track and
position which are then displayed on the Navigation and Primary Flight Displays
(ND and PFD).
The I-ADIRU position can drift over time during flight. In order to remove drift
errors, the post-flight ANR mode is automatically activated after completion of a
flight when the conditions described above are met. During post-flight ANR
mode, the I-ADIRU accepts present GPS position from the MMR to
automatically update IRS position and remove drift errors accumulated during
flight.
When the I-ADIRU drift errors accumulated during flight are removed by the
post-flight ANR mode, the FMC calculation of ground speed, track, and position
can be adversely affected. One or more of the following flight deck effects can be
observed on the ND and PFD:
• Slew of the compass rose on the ND for the “Track Up” display option
(Figure 1)
• Slew of the track line on the ND for the “Heading Up” display option
(Figure 2)
• Slew of the track line on the PFD compass rose (Figure 3)
• Change in the current track (Figure 4)
• Change in lateral path deviations (Figure 5)
• Change in FMC position resulting in a map shift (Figure 5)
•There is a perceived change in GPS position due to the map shift (Figure
6)
• Change in the FMC ANP and ground speed (Figure 7)
March 1, 2021