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in-flight relearance point (R)
- general rules with or without destination alternate
- isolated aerodrome
R
destination
alterate
°
A project supported by AIRBUS and the CAAC
Date of the module
1 - Reserves - (usual case)
2 - Isolated aerodrome procedure
3 - In flight replaning
4 - Decision point procedure
5 - Pre-determined point procedure
6 - ETOPS - critical scenario
7 - In flight fuel management
Table of Contents
A project supported by AIRBUS and the CAAC
Date of the module
long haul :
take off limitation
tank capacity limitation
the aim :
to reduce the loaded fuel quantity to increase the payload
Method :
to choose a decision point along the route either to reach, from this
point, a suitable diversion aerodrome (close to the route) or go on
to the destination aerodrome when the remaining fuel is sufficient.
A project supported by AIRBUS and the CAAC
Date of the module
A C B D
DEPARTURE DIVERSION
DESTINATION DESTINATION
ALTERNATE
DP
DECISION
POINT
A project supported by AIRBUS and the CAAC
Date of the module
Higher of the two following quantities (1) or (2):
taxi fuel
trip fuel (departure A to destination B via the decision point DP)
5% of the planned trip fuel (decision point DP to destination B)
Alternate fuel BD
Final reserve (the same as general rules)
Additional fuel (the same as general rules)
taxi fuel
trip fuel (departure A to suitable en-route diversion C via the decision
point DP)
3% (mini) of the planned trip fuel (departure A to suitable en-route
diversion C)
Final reserve (the same as general rules)
Additional fuel (the same as general rules)
1
2
A project supported by AIRBUS and the CAAC
Date of the module
1 - Reserves - (usual case)
2 - Isolated aerodrome procedure
3 - In flight replanning
4 - Decision point procedure
5 - Pre-determined point procedure
6 - ETOPS - critical scenario
7 - In flight fuel management
Table of Contents
A project supported by AIRBUS and the CAAC
Date of the module
Planned when the destination alternate is far from the
destination aerodrome.
A B
D
P
A project supported by AIRBUS and the CAAC
Date of the module
The alone possibility is to reach the alternate aerodrome
from a predetermined point P.
Loaded fuel: greater of
1 - taxy fuel + trip fuel (APB) + En route reserve + Additional
fuel (the same as isolated aerodrome).
2 - taxy fuel + trip fuel (APD) + En route reserve + Final
reserve (the same as general rules)
Note: This method is not often used by the airlines
A project supported by AIRBUS and the CAAC
Date of the module
1 - Reserves - (usual case)
2 - Isolated aerodrome procedure
3 - In flight replaning
4 - Decision point procedure
5 - Pre-determined point procedure
6 - ETOPS - critical scenario
7 - In flight fuel management
Table of Contents
A project supported by AIRBUS and the CAAC
Date of the module
The ETOPS flights must take into account the following
critical scenario
Pressurization failure + engine failure
CP
FL 100
OEI
DIVERSION
1500 ft
15 mn
Holding
1st
APP
GA
2nd
APP
A project supported by AIRBUS and the CAAC
Date of the module
The loaded fuel quantity must be the greater of the standard
fuel planing and of following fuel quantity:
taxi fuel
trip fuel (departure/critical point):TF1
trip fuel (critical point/diversion) according to the critical scenario: TF2
5% TF2 to take in account the wind forecasts errors
X1% TF2 to take in account the in service fuel mileage deterioration (usually
5%)
X2% for icing conditions (ice accumulation on wings and airframe)
holding for 15 mn above diversion aerodrome, missed approach and second
approach and landing
APU consumption during diversion time from CP
A project supported by AIRBUS and the CAAC
Date of the module
1 - Reserves - (usual case)
2 - Isolated aerodrome procedure
3 - In flight replaning
4 - Decision point procedure
5 - Pre-determined point procedure
6 - ETOPS - critical scenario
7 - In flight fuel management
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