B777 - RNP AR Approach Flashcards
Defined airspace width
2 x RNP each side of Centerline
Min Obstacle Clearance (MOC)
Initial
1000’ normally .
2000’ mountainous
Min Obstacle Clearance (MOC)
Intermediate
500’
Min Obstacle Clearance (MOC)
Final
Vertical Error Budget
Vertical Error Budget
• ANP • Wpt Rsltn • FTE • Gradient Path Error • Alt Errors • ATIS Error • ISA Dev • Body geo Error
FTE
Flight Technical Error
+/- 75 ft
Vertical RNP
75 ft FTE; plus
50 ft ANP .
= 125 ft
On hot day
Steeper descent
On colder day
Shallower descent
Does B777 have temp compensation?
NO
Therefore must adhere to chart temp limits
Cold Weather corrections
On FINAL APPROACH SEGMENT
Do NOT need to be applied for AR or LNAV/VNAV Approaches (barometric)
Cold Weather corrections
On INIT, INTERMEDIATE, M/A Segment
Must still be applied
Radius To Fix
RTF
Chart: Shows distance
CDU : Shows radius .
RTF
Tracking to WPT at start of RTF NOT PERMITTED
CAT D
Speeds
250 Initial/Inter
185 Final .
265 Missed .
RNP
Standard
- 0 Init. .
- 0 Inter .
- 3 Final .
- 0 Missed
RNP
Minimum
0.11 all segments
RAIM Availability Forecast
RAF
Required for RNP Approach
If you manually set RNP to a lower than standard value
Remember to delete it after the approach if flying a different subsequent approach.
Capture Region
90 deg of IAF Course
Capture Region
At LIP
30 deg of course after LIP
Vertical Deviation Alert bars go amber after 5 seconds
If FTE 75 ft
> half tracking FTE
“TRACK”
Limit of FTE
“TRACK LIMIT”
Limit of vertical FTE
“SLOPE LIMIT”
PF must set
TERRAIN
on PFD
