PBN and the Cockpit Workshop

Technical Requirements

FMS Operations and Aircraft Performances

Don-Jacques OULD FERHATQuovadis COO,

October 18th 2012

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• Flight Technical Error (FTE)

• Flight Operational Safety Assessment (FOSA)

• Engine Out SID (EOSID)

Summary of Existing Technical Requirements

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FTE ASSESSMENT

Desired PathDefined 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 SystemError (TSE)

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FTE Assessment

Engine failureor system failures

Wind

FTE OEI / System failuresFTE Statistical

distribution

Wind

No failure

FTE (95%)

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• 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?

FOSA

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FOSA Guidelines

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EOSID

The Departure Sector is defined in the EU-OPS 1.495. 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

35ft or 50ft

Obs n°3

Obs n°2

35ft or 50ft End of Net FP

Gross Flight Path

Net Flight Path

Obs n°4

EF at VEF

Minimum Obstacle Clearance

0.8%

0.8%

Obs n°1

35ft or 50ft

Minimum Obstacle Clearance

Engine Failure at VEF and before DP (Diversion Point) => The EOSID is flown

EOSID and Obstacle Clearance

As per:• Certification Specifications (CS/FAR 25.111 & CS/FAR 25.115)• Operating Rules (EU-OPS 1.495)• ICAO PANS-OPS Chap. II.3.1.2 – Minimum Obstacle Clearance• AC 120.91 – 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