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HSAC GULF OF MEXICO HELIDECK MARKING DRAFT RP
Presented 17 Jan 07
Introduction
•Currently no standardization.
•Too many accidents and incidents resulting fromhelideckobstacle strikes.
•Many GOM fixed platform heliports do not meet ICAO or FAA size requirements and therefore cannot apply the existing regulations.
•FAA and ICAO have reached agreement for inshore heliports. This HSAC RP is aligned with those proposals.
•API RP2L not updated in line with latest thinking and international regs
–It provides no obstacle clearance for maneuvering.
•This RP is not designed to inform new build design of helidecks.
Accident statistics 1992 -2004
Gulf of Mexico97 Accidents23% (22) Helideck relatedExcludes passenger control41% Obstacle strikes27% Loss of control in vicinity of helideck (LTE or high sink rate)•Avge 1.8 helideck accidents per year•No accidents on floating facilities that require RD or larger•All single pilot aircraftNorth Sea21 Accidents5% (1) Helideckrelated0% Obstacle strikes0% Loss of control1 accident from roll over on a drill ship helideckfollowing failure of DP system•Avge0.1 helideck related accidents per year•All decks are 1D or larger
FAA Accident statistics
1999 –2004
59 Accidents in GOM
15% Main or tail rotor strikes
56% hit obstacles on or near a helideck
15% Loss of control maneuvering around helideck.
due to LTE or high sink rate
23% Overall helideck related (Correlates to previous data)
1DHelideck1D Obstacle free surface1D Obstacle free surface0.83D or smallerHelideckAppendix 1HelideckObstacle Protected AreasThe following obstacle protected area guidance is based on the requirements of ICAO Annex 14 and CAP 437.1.0Obstacle Free SurfaceAhelideckshall have an obstacle free surface. This obstacle free surfaceshould be sufficiently large to contain a circle of diameter D (OL), equalto the largest dimension of the helicopter when rotors are turning. This circle should normally be encompassed within thehelideckarea for a 1D deck, but when applied to a 0.83 deck or smaller,the extent of the circle will extend beyond the physical boundary ofthe deck.150ºlimited obstaclesector150ºlimited obstaclesector
From any point on the periphery of the
above D circle, an obstacle-free approach and take off sector should be provided which totally encompassesthe FATO/landing area and D circle and which extends over an area ofat least 210°. Within this sector and out to a distance of 3280 ft (1000m) fromthe periphery of the landing area, only the following items may exceed the heightof the landing area, but should not do so by more than 10 inches (0.25m)
§ Guttering
§ Deck lighting
§ The outboard edge of the safety net.
§ Foam monitors
§ Handrails and other items associated with the landing area which are incapable of complete retraction or lowering for helicopter operations.
　
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