Breaking the Accident Chain: HTAWS

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International Helicopter Safety Team (IHST) workshop presentation from HeliExpo 2013

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Breaking the Accident Chain: HTAWS

  1. 1. Breaking the Accident Chain IHST Safety Workshop March 4, 2013
  2. 2. Agenda• Breaking the Accident Chain Overview – FAA Case Scenario• HTAWS Truths and Myths• HTAWS – What you need to know• Mandate Update
  3. 3. Breaking the Accident ChainNTSB Accident Number: NYC05MA039
  4. 4. Breaking the Accident ChainMission: HEMS repositioning flightDeparture point: Washington HospitalCenter Helipad (DC08) – Washington DCDestination: Stafford Regional Airport (RMN)Stafford, VAFlight distance: 38 NM
  5. 5. Breaking the Accident ChainWeather at the accident site (DCAAutomated Weather Observation):Winds calm, Visibility 10NM, Broken cloudsat 13,000’ and 20,000’, Temperature 45° F,Dew point 36° F, Altimeter 30.25**************************************************Moon Illumination: None
  6. 6. Breaking the Accident ChainPilot Information: Commercial Pilot – ASEL,AMEL, Rotorcraft Helicopter, InstrumentHelicopterMedical: Current, Second ClassPilot Experience: 1500 hours total time42 hours in the last 90 days12 hours in the last 30 days1 hour in the last 24 hours71 night landings total
  7. 7. Breaking the Accident ChainAircraft: Eurocopter EC-135 P2AFTT: 166.6 HoursMaintained IAW FAA approved aircraftinspection program.This aircraft was being flown with a properlydeferred inoperative radar altimeter.
  8. 8. Breaking the Accident ChainDeparted DC08@ 2304FollowedHelicopter Route1 along theAnacostia Riverto HelicopterRoute 4 and thenflew south alongthe PotomacRiver.
  9. 9. Breaking the Accident ChainPOINT A“Washington tower traffic on a ten milefinal is an Airbus”
  10. 10. Breaking the Accident Chain HTAWS with Traffic Display
  11. 11. Breaking the Accident ChainPOINT B“Roger, we have him in sight and will beout of his way”
  12. 12. Breaking the Accident ChainPOINT C FATAL DESCENT
  13. 13. Breaking the Accident ChainPOINT D IMPACT
  14. 14. Breaking the Accident Chain Benefits of HTAWSIncrease Situational Awareness by:• Provides a display showing surrounding terrain, airports.• Provides a display of obstacles (not all HTAWS display transmission lines).• Provides a display of nearby traffic.• Provides altitude awareness through the use of altitude callouts and GPWS alerts.
  15. 15. Breaking the Accident ChainSummary:The best trained pilot can’t see everything.HTAWS contributes to situational awarenessby helping the pilot to avoid dangers he maynot see when he looks outside.
  16. 16. Issues and Options• Issues Options – Nuisance Alerts – – Wire Database Pilots turn the system off – 3 arc data vs. 6 arc data – Certification – what is required? – Radar Altimeter – Installation – Traffic Display – Safety vs. Budget – Display options – Liability in waiting – NVIS to comply
  17. 17. Certified HTAWS Options
  18. 18. What to ask before you purchase• What companies/OEM are using the manufacture’s HTAWS and what have been the results?• How does the HTAWS system qualify for certification, technically?• What is the cost of waiting to install – Liability – Availability and time limits – Certification headache – waste time and money
  19. 19. FAA Mandate Update Milestone Originally New Actual Scheduled Projected Date Date DateTo OST 1/04/2012 4/03/2012 4/03/2012To OMB 2/06/2012 12/14/2012OMB 5/03/2012 3/15/2013ClearancePublication 5/21/2012 3/29/2013Date
  20. 20. A special thanks to our sponsors! Afternoon Break

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