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Office of Aviation Safety
Customs and Border Protection
Predator B Accident
Customs and Border Protection
Predator B Accident Nogales, Arizona
April 25, 2006
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Mobile Ground Control Station
(MGCS) Ground Control Station (GCS)
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PPO-1 PPO-2
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Southern US Border TFR
Crash Site
Route of Flight
Departure Airport & Ground Control Station (GCS)
TFR Boundary
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Accident SequenceAccident Sequence
• 6:51 pm - Aircraft departs• 3:32 am - PPO-1 locks up• 3:33 am - Switches control to PPO-2
– Fuel cut off to aircraft
• 3:35 am - Sends aircraft to lost link• Aircraft descends below LOS and
impacts terrain
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Condition lever
Throttle
Speed lever
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Iris control
Field of view
Focus
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Pilot Qualification ReviewPilot Qualification Review
• CBP requirements– Commercial/Instrument pilot– 200 hours manned aircraft– 200 hours UAS
• Pilot experience– 3,035 hours – manned aircraft – 519 hours – Predator A– 27 hours – Predator B
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Pilot Training ReviewPilot Training Review
• Pilots were General Atomics employees
• General Atomics provided training• No CBP government flight
representative• Verbal agreement
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UAS Lock-upsUAS Lock-ups
• 4 Months– 16 lock-ups– 2 prior to accident flight
• GCS maintenance plans were inadequate
• No spare parts
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Accident FindingsAccident Findings
• Pilot had minimal Predator B experience
• Pilot met flight time requirements• Instructor pilot not present in GCS• Pilot failed to use checklist • Pilot did not identify engine status
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Accident FindingsAccident Findings
• Unresolved console lockups• Maintenance procedures• Inadequate oversight by CBP
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StaffStaff
• Daniel Bartlett ATC• John Clark Chief Scientist• Bill English Facilitator• Steve Magladry Systems• Ed Malinowski Structures/Powerplant• Dana Schulze System Safety• Pam Sullivan IIC/Operations• Michelle Wright Editor
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Parties to the InvestigationParties to the Investigation
• Federal Aviation Administration• Customs and Border Protection• General Atomics Aeronautical
Systems, Inc.• Honeywell
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