performance based aerodrome operating minima
TRANSCRIPT
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Performance Based Aerodrome Operating Minima
DRAFT 2
A New Approach to Lands End Airport
Ken Ashton With thanks to The Isles of Scilly Steamship Group
ICAO SANIS Montreal
14 December 2017
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Lands End Airport
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The Operation The Isles of Scilly Steamship Group (ISSG): • Exists to provide lifeline passenger and
freight services to the Isles of Scilly. • ISSG comprises:
– Lands End Airport. – Isles of Scilly Skybus. – Maritime passenger and freight vessels.
• Passenger services March-November.
Isles of Scilly. • 28 Miles South West of Lands End. • Archipelago 55 islands, 5 inhabited. • Population approx. 2000. (Winter) • Mildest climate in UK.
– Tourism and cut flowers are major contributors to the economy of the islands.
St Mary’s Airport implementing LPV to all Runways in 2018.
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• IOS Skybus Aircraft: – 4 DHC6-300. (Twin Otter)
• Garmin GTN 750/650.
– 4 BN2 (Islander) • Dual GTN 650.
– All aircraft equipped with ADS B.
• Skybus also operate services from Newquay and Exeter (Seasonal)
• Lands End 2016 statistics – Total Movements 11,189. – Commercial Transport 9,023. – Private 1,023. – Freight 71 Tonnes. – Mail 198 Tonnes.
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Lands End Airport 2012 (LEQ-EGHC) • Grass runways. • Aerodrome ATC (Visual) within the ATZ. • Portable low intensity Aerodrome lighting. • Cliff-top location 422’ AMSL, exposed to Atlantic storms. • Increasing problems with water-logged runways that closed the
Aerodrome for extended periods in winters 12/13 &13/14. • Lands End Operation had not significantly changed in 75 Years. • Customers now have increased expectation for airport facilities
and reliability of services.
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Major Infrastructure Upgrades • 2013 New Terminal and Tower. • 2014 Aerodrome drainage and
Asphalt runways and taxiways. • Compliant aerodrome lighting:
– High Intensity edge, Stop and Threshold wing Bars.
– APAPI. – Strobe Runway Threshold
Indicators.
• 2016 RNP APCH to 4 runway ends. – Estimated to reduce days impacted
by Poor visibility or cloud-base by 50%.
– Facilitated by CAA Publication 1122.
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CAA Publication CAP 1122 • “A more progressive policy requires a change in
regulatory approach from one based upon standards to one based on risk.”
• CAP 1122 “approvals are exceptions to the normal standard.“ – IAPs have a minimum DH of 500’
• Process: – Assess deficiencies from existing standards – Eliminate or reduce the deficiencies wherever possible. – Assess residual deficiencies and mitigate to the
maximum extent practical.
• Document the mitigations and risk assessments in a comprehensive Safety Case.
• Demonstrating that Accidents through: – CFIT, – Runway Excursion – Runway Collision, Mid Air Collision – Loss of Control – or through IAP introduction and through life operation
“Are Acceptably Low”
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Lands End RNP APCH Procedures Developed in full compliance with ICAO 8168 (PANS-OPS) • LNAV and LPV • Limited to Category A Aircraft.
– Limited by Runway length. – Allows a compact procedure.
• R/w 07, 16, 25; 3.5° Path Angle • R/w 25; 4.5° Path Angle (Terrain)
– VPA harmonised with APAPI. – Aircraft performance assessed
for 4.5° approach.
• IAPs designed to minimise conflicts with operations at St Mary’s and Culdrose. – Oversea Holds at 16 and 34 IF. – R/w 25 and 34 limited Initial
segments.
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Runway Protection Improvements Strip width requirements 30m (Non Instrument) 75m (Non-Precision Instrument): • Runway 07/25 Strip width Increased.
– 40 m strip width obtained and Frangibility and conspicuity of boundary fences improved.
• Runway 16/34 Strip width increased – 75 m strip width obtained by “Land Swap” with neighbour. – Runway End Safety Areas identified
• Treatment of Transitional Surface penetrations: – Relocation of Anemometer, reduced height of car park lighting towers,
lighting of ‘tractor-shed,’ improved frangibility of fence posts.
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Airspace Limitations and Mitigations Limitations • IAPs implemented in Class G Airspace. • No Approach Control. Mitigations • Surrounding Airspace has low traffic density and low complexity. • Lands End airport and use of the IAPs is strictly PPR.
– De-confliction by allocation of timed slot as part of PPR assures only one aircraft on approach at any time. Aircraft held on ground if necessary.
– Confirmation that IAP briefing material on Lands End airport web site understood.
• Newquay and Culdrose have radar coverage. – SSR conspicuity code assigned to aircraft participating in the IAP.
• Letters of Agreement for procedures in the Lands End Transit Corridor and with RNAS Culdrose.
• Lands End ATC upgraded to Aerodrome Instrument ratings to allow integration of Instrument and Visual traffic.
• Feathered Arrows included on VFR Charts to warn GA pilots of the IAPs.
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Further Opportunities
• CAP 1122 limits the MDA or DA to 500’. – Is appropriate for GA operations. – Is a significant limitation to Commercial Air Transport
operations, particularly on Runways 16 and 34. – 16/34 now compliant with Non-Precision Instrument
requirements • with minor transitional surface penetration.
– LPV OCH defined by obstacle environment: • Runway 16; 327’ Runway 34; 250’ • Reconsideration of DA limitation for Commercial Air
Transport operations would provide significant operational benefit.
– DH in the 300-350’ range likely to provide a positive ‘Business Case’ for improved Approach Lighting.
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DH89 Dragon Rapide G-AHAG
Operated by Scillonia Airways, Lands End - St Mary’s 1965-1969
Thank You For Your Attention