ghost busting advanced requirements engineering se 6361 (fall 2014) dr. lawrence chung presented by:...

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GHOST BUSTING ADVANCED REQUIREMENTS ENGINEERING SE 6361 (FALL 2014) DR. LAWRENCE CHUNG PRESENTED BY: ADAM HOWARD

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GHOST BUSTING

ADVANCED REQUIREMENTS ENGINEERING

SE 6361 (FALL 2014)

DR. LAWRENCE CHUNG

PRESENTED BY: ADAM HOWARD

LARRY AND JANE GLAZER

Larry Glazer Real estate developer in Rochester, New York Buckingham Properties - Rochester’s largest

commercial real estate portfolio Xerox Tower Bausch + Lomb Midtown Tower

Jane Glazer Math Teacher (before going into business) Owner of QCI Direct – A catalog company Completed New York City Marathon in 1995

“The Glazers were innovative and generous people who were committedto revitalizing downtown Rochester and making the city they loved a betterplace for all.” - Gov. Andrew Cuomo

PAYNE STEWART

Well known for his exuberant golfing outfits

American Professional Golfer

Won MCI Heritage Golf Classic 1989

Won PGA Championship 1989

Won US Open 1991 & 1999

Played for the US on three World Cup teams

WHAT DO THEY HAVE IN COMMON?

• Flying in private aircraft

• Aircraft deviated from flight plan

• No response when Air Traffic Controller radioed

• Two F-16 called in to investigate the “Ghost Aircraft”

• F-16 pilots report windows iced over

• Autopilot for both aircraft were engaged

• Aircraft crashes after running out of fuel

• No survivors

Payne Stewart

October 25, 1999

Jane and Larry Glazer

September 5, 2014

WHAT HAPPENED?

• Mechanical failure compromises the integrity of the cabin

• Cabin depressurizes • Door, window or duct seal failure?

• 60% of corporate jet depressurizations are caused by uncontained engine failure• Air enters engine from outside, drawn off, compressed,

heated and used to pressurize the cabin

• Pilot and crew experience hypoxia

WHAT IS HYPOXIA?

• Hypoxia - a condition in which the body or a region of the body is deprived of adequate oxygen supply.

• What happens at 40,000 feet during depressurization?• Warning alarms/lights go off in cockpit

• Pilots dawn oxygen mask / masks fall from ceiling for passengers

• Pilot takes aircraft below 10,000 FT

• Normally, atmosphere inside airplane should never feel more than @ 8,000 FT

TIME OF USEFUL CONSCIOUSNESS

Altitude (feet) Consciousness15000 30 min or more

18,000 20-30 min 22,000 5-10 min 25,000 3-5 min 28,000 2.5-3 min 30,000 1-3 min 35,000 30-60 sec 40,000 15-20 sec 45,000 9-15 sec 50000 6-9 sec

Research by the US Air Force shows 80 % of pilots with no experience of decompression wait as long as 15 seconds to

respond correctly to a loss of cabin pressure.

Stewart (46.4K)

Glazer (28.0K)Mt. Everest (27.9K)

PROBLEM-GHOST AIRCRAFT-

Small aircraft depressurization and pilot/crew becomes unconscious

• With autopilot engaged aircraft keeps flying at high altitudes

• Air Traffic Control has no status of aircraft

• Standard practice is to contact Air Force and request assistance

• Chase plane providing visual inspection is all they can do

• Autopilot continue to fly the programmed course for hours

• Aircraft eventually runs out of fuel and crashes

(This could happen over a highly populated area )

Post crash analysis• Cockpit Voice and Data Recorders (CVDR) have

limited voice recording capability making it difficult to hear communications if outside record window

2 HRS of voice recording time

QUESTIONS ?

BACKUP SLIDES

GHOST BUSTING(THE SOLUTION)

• Autopilot detects depressurization and takes aircraft to lower altitude (<10,000 FT)

• Get crew and passengers to a breathable altitude

• Maybe pilot will regain consciousness and save the day

• In flight data link

• Capture CVDR data

• Download state of aircraft

• Report estimated fuel remaining to pinpoint crash site (to avoid populated areas)

• Determine cause of malfunction

• Remote override of autopilot to redirect aircraft

• Smart Cockpit Voice Recorder - saves recordings in relation to alarms and events

CHALLENGES

• What to do if system can’t decent to < 10,000 FT

• Flying in the mountains

• Traffic below aircraft

• Security

• FAA Regulations

ROBERT EDWARD “BO” REIN

Ohio State University Football (1964-1966 )-Led team in receptions 1964 & 1965-Rushing in 1966

Baseball (1965-1967)- Helped win 1966 College World Series

Noted Football Coach (1972-1980)North Carolina State Louisiana State