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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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