ATR 72 Inoperable Brakes and Nose Wheel Steering

1
ATR 72 Inoperable Brakes and Nose Wheel
Steering
2
Sequence of Events

• Post maintenance engine run conducted
• Aircraft required to be repositioned
• Hand brake released and engine thrust increased

3
Sequence of Events

• Nose Wheel Steering (NWS) inoperative
• Main Brakes inoperative
• Motionless for 8 seconds
• Reverse thrust applied
• Aircraft collides with hangar

4
Contributing Factors Experience level

• Limited experience in engine running and taxiing
  procedures
• Discussions with the maintenance manager
• Lack of action period taken as aircraft travelled
  towards the hangar
• Park Brake not applied

5
Contributing Factors - Training Issues

• Ad hoc training
• Several instructors
• No syllabus to follow
• Limited exposure to emergency procedures
• No annual refresher / reauthorisation training

6
Contributing Factors Conforming to regulations

• Checklist required for all engine runs and
  aircraft taxi movements (company policy)
• Two person for aircraft taxi (company policy)

7
Contributing Factors Quality Assurance

• Poor engine run training
• Disregard for instructions

8
Breeches
Accident or incident
Defences
Regulations
Training
Skills
Experience
9
Think AMIP

• Align skills and experience with task
• Maintain training and experience level
• Instruction adherence is mandatory
• Policies procedures protect our people

10
(No Transcript)