1. PBN and the Cockpit Workshop
Technical Requirements
FMS Operations and Aircraft Performances
Don-Jacques OULD FERHAT
Quovadis COO,
October 18th 2012

2. Summary of Existing Technical Requirements
Flight Technical Error (FTE)
Flight Operational Safety Assessment (FOSA)
Engine Out SID (EOSID)
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3. Project title (Insert, Header & Footer)
FTE ASSESSMENT
Desired Path
Defined Path
Estimated Position
True Position
Path Steering Error (PSE) or
Flight Technical Error (FTE) with AP ON
Position Estimation Error (PEE)
or Navigation System Error (NSE)
Path Definition Error (PDE)
Total System Error (TSE)
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4. Statistical distribution
FTE Assessment
Engine failure
or system failures
Wind
FTE OEI / System failures
FTE
Statistical distribution
Wind
No failure
FTE (95%)
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FOSA
FOSA stands for Flight Operational Safety Assessment
Eurocontrol Guidance Material released in 2010 and ICAO Working Paper few months later
But what does it really mean?
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FOSA Guidelines
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EOSID
The Departure Sector is defined in the EU-OPS
The Obstacles are taken into account within a combination of:
Cone from as defined in EU-OPS 1.495
Corridor with half-width equal to 2xRNP value
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EOSID
Engine Failure at VEF and before DP (Diversion Point)
=> The EOSID is flown
EOSID and Obstacle Clearance
As per:
Certification Specifications (CS/FAR & CS/FAR )
Operating Rules (EU-OPS 1.495)
ICAO PANS-OPS Chap. II – Minimum Obstacle Clearance
AC – 9 (Termination of Takeoff segment)
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CONCLUSION
FTE assessment methodology should be made available for OEM
FOSA guidelines should be endorsed by ICAO and shared
EOSID with RNP provide safety enhancement and should be widely promoted
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