introduction to the concept · olm fbw 2006 engine out sid introduction to the concept presented by...
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![Page 1: Introduction to the concept · OLM FBW 2006 Engine Out SID Introduction to the concept Presented by Olivier HUSSE Group Manager, Single Aisle Aircraft operational performance](https://reader034.vdocument.in/reader034/viewer/2022052521/60a9b829713a48036168da23/html5/thumbnails/1.jpg)
OLM FBW 2006
Engine Out SID Introduction to the concept
Presented by
Olivier HUSSEGroup Manager, Single Aisle Aircraft operational performance
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Title of the presentation 2 OLM FBW 2006
Introduction
Context
Regulatory requirements: JAR25, JAR-OPS, FAR25, FAR121– Determination of takeoff performance– Obstacle clearance
Operational requirements: Standard Instrument Departures (SIDs)
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Title of the presentation 3 OLM FBW 2006
Introduction
Standard Instrument Departures (SIDs)
Operational requirement, designed by the airport authorities
Major SID constraints are climb capability constraints– Climb gradients to fulfil (and corresponding rate of climb)– Altitude to achieve at a given point– Cutback imposed, minimum speed
Purpose of SIDs– To ensure obstacle clearance and respect of constraints (buildings, terrain,
flights over inhabited areas…)– To comply with required minimum altitudes– To reduce noise emissions– For ATC purposes
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Title of the presentation 4 OLM FBW 2006
Introduction
For a given runway, several SIDs may be defined
The pilot chooses one depending onThe airway to use (route to destination)Capability of the aircraft to fulfill all published constraints
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Title of the presentation 5 OLM FBW 2006
It is the operator’s responsibility to check whether the SID can
be followed or not
A SID cannot be usedif the constraints are not fulfilled
Introduction
Standard Instrument Departures (SIDs)Do not consider the one engine out case unless specific notification
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Title of the presentation 6 OLM FBW 2006
Introduction
Standard Instrument Departures (SIDs)Most of the time, the regulatory takeoff performance allows to follow the SIDHigh climb gradients may be required in mountainous area– Can be easily achieved with all engines running– Cannot be fulfilled in case of engine failure at V1
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Title of the presentation 7 OLM FBW 2006
1
5 Conclusion
4 Airbus Tools and Training
3 FMS / FMGC Considerations
2 Engine Out SID Design Strategy
Standard Takeoff Analysis
Contents
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Title of the presentation 8 OLM FBW 2006
1
5 Conclusion
4 Airbus Tools and Training
3 FMS / FMGC Considerations
2 Engine Out SID Design Strategy
Standard Takeoff Analysis
Contents
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Title of the presentation 9 OLM FBW 2006
Standard takeoff analysis
Before dispatching any aircraft from an airfield,
Determine the takeoff performance limited weight.
In case of critical airports, conduct a detailed takeoff analysis following several steps:– Identification of runway data– Computation of takeoff charts– Verification of the validity of the takeoff analysis
Obstacle clearance until the aircraft reaches a safe altitudeSID constraints
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Title of the presentation 10 OLM FBW 2006
Standard takeoff analysis
Identification of runway data
Airports and airport data providers publish various documents useful for takeoff analysis
– AIP– ICAO Type A, B and C charts– Topographical maps– Airport data in digital format
Using this data allows to identify relevant obstacles for takeoff performance analysis
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Title of the presentation 11 OLM FBW 2006
Standard takeoff analysis
Identification of runway data
Referenced
obstacles
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Title of the presentation 12 OLM FBW 2006
Standard takeoff analysis
Computation of takeoff chartsTakeoff chart is computed considering published obstacles to obtain a rough idea of TOW and speeds
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Title of the presentation 13 OLM FBW 2006
Standard takeoff analysis
Verification of the validity of the takeoff analysisObstacles from data provider– are generally located along the extended runway axis – further ones along the SID are not mentioned and won’t be
accounted for in the previous computation
Referenced
obstacles
What about this area?
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Title of the presentation 14 OLM FBW 2006
THUS...
I MUST CHECK WHETHER MY AIRCRAFT CAN FOLLOW THE SID
with all engines
with one engine out
AND CLEAR THE OBSTACLES WITH THE REQUIRED MARGIN
Standard takeoff analysis
Verification of the validity of the takeoff analysisNo obstacle along the remote and curved part of the SID has been directly accounted forCurrent regulatory performance accounts for close referenced obstacles only
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Title of the presentation 15 OLM FBW 2006
Standard takeoff analysis
Verification of the validity of the takeoff analysisThe net flight path obtained from the takeoff analysis must clear the remote obstacles with the required margin
DISTANCE FROM 35FT HEIGHT
ALTITUDE
NET FLIGHT PATH
TAKEOFF
THRUST
SLATS / FLAPSRETRACTION
FTO
MCT
ACCELERATION
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Title of the presentation 16 OLM FBW 2006
D1 is the necessary distance for OBS1 clearance EOSID
Standard takeoff analysis
Verification of the validity of the takeoff analysisThe net flight path obtained from the takeoff analysis must clear the remote obstacles with the required margin
ALTITUDE(Ft)
NET FLIGHT PATH
DISTANCE FROM 35FT HEIGHT
OBS2
D2
OBS1
D1
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Title of the presentation 17 OLM FBW 2006
Standard takeoff analysis
Verification of the validity of the takeoff analysisThe net flight path obtained from the takeoff analysis must clear the remote obstacles with the required margin– Acceleration height can be optimised if necessary between minimum
and maximum height as given on the takeoff chart
10 min max TO thrust
OBS1
≥ 1000 ft
D1 D2
OBS2
MAX
MIN
obstacle clearance
ALTITUDE(Ft) NET FLIGHT PATH
DISTANCE FROM 35FT HEIGHT
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Title of the presentation 18 OLM FBW 2006
Standard takeoff analysis
Verification of the validity of the takeoff analysisThe net flight path obtained from the takeoff analysis must clear the remote obstacles with the required marginThe gross flight path all engines operating must satisfy the normal SID constraintsThe gross flight path one engine out should satisfy the normal SID constraints
If one of the above condition is not met, consider reducing the takeoff weight for the takeoff analysis
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Title of the presentation 19 OLM FBW 2006
Standard takeoff analysis
Is an engine failure procedure required?No straightforward answer, without initial takeoff analysis
If the limiting obstacles are close to the end of the runway, is it possible to have a different path to avoid them?
Is the obtained payload satisfactory for operations or not?
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Title of the presentation 20 OLM FBW 2006
1
5 Conclusion
4 Airbus Tools and Training
3 FMS / FMGC Considerations
2 Engine Out SID Design Strategy
Standard Takeoff Analysis
Contents
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Title of the presentation 21 OLM FBW 2006
Engine Out SID design strategy
What is an EOSID?
Departure procedure diverging from standard departure, to be flown in case of engine failure.
Produced by the operator and sometimes validated by local authorities.
Special pilot briefing and simulator training to be considered.
In some cases, EOSID are published by airports
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Title of the presentation 22 OLM FBW 2006
Engine Out SID design strategy
When is the use of an EOSID necessary?
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Title of the presentation 23 OLM FBW 2006
Engine Out SID design strategy
When is the use of an EOSID necessary?
When the published SID can’t be flown in One Engine Out conditions.
When the MTOW limited by a SID with One Engine Out is not commercially satisfactory to the operator.
Whenever required by the local authorities.
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Title of the presentation 24 OLM FBW 2006
Engine Out SID design strategy
Purpose of an engine failure procedure
To avoid weight reduction when takeoff performance is limited by:– an obstacle– a climb constraint
To establish a new flight path– To avoid the limiting obstacle(s)– To provide more distance to climb
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Title of the presentation 25 OLM FBW 2006
Engine Out SID design strategy
EOSID to be designed considering engine failure 1s before V1
Most critical case
A decision point must be defined on the take-off pathAn engine failure beyond this point will not prevent following the SID
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Title of the presentation 26 OLM FBW 2006
Engine Out SID design strategy
Recipe for an EOSID
1. Computation of takeoff charts
2. Determination of the net takeoff flight path
3. Determination of a pattern
4. Verification of the obstacle clearance
5. Determination of a decision point
6. Procedure writing
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Title of the presentation 27 OLM FBW 2006
Engine Out SID design strategy
Recipe for an EOSID
1. Computation of takeoff charts
2. Determination of the net takeoff flight path
3. Determination of a pattern
4. Verification of the obstacle clearance
5. Determination of a decision point
6. Procedure writing
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Title of the presentation 28 OLM FBW 2006
Engine Out Standard Instrument Departure
According to JAR-OPS 1…
Decision Point
LET’S SEE IT GRAPHICALLY…
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Title of the presentation 29 OLM FBW 2006
Engine Out Standard Instrument Departure
When an EOSID is considered there is a point beyond which both trajectories divert:
Deviation Point
DEVIATION POINT
V1
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Title of the presentation 30 OLM FBW 2006
Decision Point
Engine failure before DPEOSID
Engine failure after DPSID
Engine Out SID design strategy
5. Determination of a decision pointIf engine failure occurs at V1, EOSID is flownWhich procedure should be flown if failure occurs after V1?Can the SID constraints be met?
CONCLUSION:The DECISION POINT is always before or at the
DEVIATION POINTDEVIATION POINT
V1
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Title of the presentation 31 OLM FBW 2006
Decision Point
Engine failure before DPEOSID
Engine failure after DPSID
Determination of decision pointDetermination of decision pointEngine Out SID design strategy
5. Determination of a decision pointIf engine failure occurs at V1, EOSID will be flownWhat will happen if failure occurs after V1 ?Could the SID or the EOSID be flown ?
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Title of the presentation 32 OLM FBW 2006
Determination of decision pointDetermination of decision pointEngine Out SID design strategy
5. Determination of a decision pointDetermine takeoff flight path all engines operative
– Noise definition manual– OCTOPER
Draw the path on a chart
On the chart, place the altitude constraint
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Title of the presentation 33 OLM FBW 2006
Determination of decision pointDetermination of decision pointEngine Out SID design strategy
5. Determination of a decision point
Note : Distance to be considered for constraint is distance from runway
threshold to the constraint following SID track
AltitudeConstraint
Distance
All e
ngine
s pat
h
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Title of the presentation 34 OLM FBW 2006
AltitudeConstraint
Distance
All e
ngine
s pat
hOne engine inop
path
Determination of decision pointDetermination of decision pointEngine Out SID design strategy
5. Determination of a decision pointStarting from constraint draw back the one engine inoperative flight path
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Title of the presentation 35 OLM FBW 2006
AltitudeConstraint
Distance
All e
ngine
s path
One engine inop
path
DP
Y
X
Determination of decision pointDetermination of decision pointEngine Out SID design strategy
5. Determination of a decision pointIntersection between both flight paths givesthe decision point
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Title of the presentation 36 OLM FBW 2006
Determination of decision pointDetermination of decision pointEngine Out SID design strategy
5. Determination of a decision point
A straightforward method is to take decisionpoint equal to deviation point– Easy to find– Does not let time to the pilot to prepare for the diversion
The decision point shall be validated– By checking the net flight path after DP– By ensuring obstacle clearance after DP
![Page 37: Introduction to the concept · OLM FBW 2006 Engine Out SID Introduction to the concept Presented by Olivier HUSSE Group Manager, Single Aisle Aircraft operational performance](https://reader034.vdocument.in/reader034/viewer/2022052521/60a9b829713a48036168da23/html5/thumbnails/37.jpg)
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Title of the presentation 37 OLM FBW 2006
Engine Out SID design strategy
Recipe for an EOSID
1. Computation of takeoff charts
2. Determination of the net takeoff flight path
3. Determination of a pattern
4. Verification of the obstacle clearance
5. Determination of a decision point
6. Procedure writing
![Page 38: Introduction to the concept · OLM FBW 2006 Engine Out SID Introduction to the concept Presented by Olivier HUSSE Group Manager, Single Aisle Aircraft operational performance](https://reader034.vdocument.in/reader034/viewer/2022052521/60a9b829713a48036168da23/html5/thumbnails/38.jpg)
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Title of the presentation 38 OLM FBW 2006
Engine Out SID design strategy
6. Procedure writingEOSID with Decision Point defined
Acceleration altitude should be definedfor the engine failure case after DP
Two different parts– One for engine failure below DP– One for engine failure above DP
Comprehensive format for :– Direct use by pilots– FMS/FMGS data bank updating (as applicable)
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Title of the presentation 39 OLM FBW 2006
1
5 Conclusion
4 Airbus Tools and Training
3 FMS / FMGC Considerations
2 Engine Out SID Design Strategy
Standard Takeoff Analysis
Contents
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Title of the presentation 40 OLM FBW 2006
FMS/FMGC considerations
Diversion pointThe FMS diversion point is calculated by the FMS, taking into account the different legs entered in the FMS NAV database
No temporary flight plan selection is possible after diversion point
![Page 41: Introduction to the concept · OLM FBW 2006 Engine Out SID Introduction to the concept Presented by Olivier HUSSE Group Manager, Single Aisle Aircraft operational performance](https://reader034.vdocument.in/reader034/viewer/2022052521/60a9b829713a48036168da23/html5/thumbnails/41.jpg)
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Title of the presentation 41 OLM FBW 2006
FMS/FMGC considerations
Diversion pointThe FMS diversion point is calculated by the FMS, taking into account the different legs entered in the FMS NAV database
No temporary flight plan selection is possible after diversion point
A
B
C
2
1
E
SID
EOSID
Temporary Flight Plan activation before DP
No problem !
DP
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Title of the presentation 42 OLM FBW 2006
FMS/FMGC considerations
Diversion pointThe FMS diversion point is calculated by the FMS, taking into account the different legs entered in the FMS NAV database
No temporary flight plan selection is possible after diversion point
A
B
C
2
1
E
SID
EOSID
Temporary Flight Plan activation after DP
Aircraft will follow SID
![Page 43: Introduction to the concept · OLM FBW 2006 Engine Out SID Introduction to the concept Presented by Olivier HUSSE Group Manager, Single Aisle Aircraft operational performance](https://reader034.vdocument.in/reader034/viewer/2022052521/60a9b829713a48036168da23/html5/thumbnails/43.jpg)
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Title of the presentation 43 OLM FBW 2006
FMS/FMGC considerations
Diversion pointThe FMS diversion point is calculated by the FMS, taking into account the different legs entered in the FMS NAV database
No temporary flight plan selection is possible after diversion point
Thus, Airbus recommendation is:– Diversion point equal to deviation
point
– The SID/EOSID common legs until the flight paths separate must be of the same type and nature
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Title of the presentation 44 OLM FBW 2006
1
5 Conclusion
4 Airbus Tools and Training
3 FMS / FMGC Considerations
2 Engine Out SID Design Strategy
Standard Takeoff Analysis
Contents
![Page 45: Introduction to the concept · OLM FBW 2006 Engine Out SID Introduction to the concept Presented by Olivier HUSSE Group Manager, Single Aisle Aircraft operational performance](https://reader034.vdocument.in/reader034/viewer/2022052521/60a9b829713a48036168da23/html5/thumbnails/45.jpg)
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Title of the presentation 45 OLM FBW 2006
Airbus tools and training
Airbus software
In order to ease the design of takeoff engine failure procedures,
specific Airbus software is available
– Through the Performance Engineers Package (PEP)
Flight Manual (FM) component
Takeoff and Landing Optimization (TLO) component
Operational Flight Path (OFP) component
Airbus Departure Analysis Software (ADAS) component
![Page 46: Introduction to the concept · OLM FBW 2006 Engine Out SID Introduction to the concept Presented by Olivier HUSSE Group Manager, Single Aisle Aircraft operational performance](https://reader034.vdocument.in/reader034/viewer/2022052521/60a9b829713a48036168da23/html5/thumbnails/46.jpg)
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Title of the presentation 46 OLM FBW 2006
Airbus tools and training
Airbus software Operational Flight Path (OFP) component
– The OFP (also called OCTOPER) is an Airbus software designed to simulate the aircraft trajectory
With all engines running
With one engine out
– Allows the operator to define the SID and to compute the corresponding performance of its aircraft along it
– Allows to check the compliance with SID requirements and/or SID flyability(stall, bank angle...)
– Capable of SID definition
Airbus Departure Analysis Software (ADAS) component
– Future component specifically designed for that purpose
![Page 47: Introduction to the concept · OLM FBW 2006 Engine Out SID Introduction to the concept Presented by Olivier HUSSE Group Manager, Single Aisle Aircraft operational performance](https://reader034.vdocument.in/reader034/viewer/2022052521/60a9b829713a48036168da23/html5/thumbnails/47.jpg)
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Title of the presentation 47 OLM FBW 2006
Airbus tools and training
Training
Standard Performance Engineer’s Course– Theory on aircraft performance and Regulations
– Airbus software (PEP)
Advanced Performance Engineer’s Course
– Specific module for EOSID design
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Title of the presentation 48 OLM FBW 2006
1
5 Conclusion
4 Airbus Tools and Training
3 FMS / FMGC Considerations
2 Engine Out SID Design Strategy
Standard Takeoff Analysis
Contents
![Page 49: Introduction to the concept · OLM FBW 2006 Engine Out SID Introduction to the concept Presented by Olivier HUSSE Group Manager, Single Aisle Aircraft operational performance](https://reader034.vdocument.in/reader034/viewer/2022052521/60a9b829713a48036168da23/html5/thumbnails/49.jpg)
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Title of the presentation 49 OLM FBW 2006
Conclusion
Operators should check constraints on published SIDEngine failure at V1 (compute takeoff charts)After V1 (compute operational flight path with one engine out)
Define EOSID if necessary
Existing EOSIDs for other aircraft may be used,but obstacle clearance has to be checked
Dispatching the aircraft as efficiently as possible must not supersede flight safety
![Page 50: Introduction to the concept · OLM FBW 2006 Engine Out SID Introduction to the concept Presented by Olivier HUSSE Group Manager, Single Aisle Aircraft operational performance](https://reader034.vdocument.in/reader034/viewer/2022052521/60a9b829713a48036168da23/html5/thumbnails/50.jpg)
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Title of the presentation 50 OLM FBW 2006
Conclusion
Means and tools must be implemented at all levels to give the pilots access to appropriate procedures
Close co-ordination betweenOperatorsAirport authoritiesATC
FMS/FMGS data bank updating or use conventionalNAV aids
Airbus focuses its efforts on this issue by proposing tools and training to help designing specific procedures
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Title of the presentation 51 OLM FBW 2006
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