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Accident List

The accident list should contain a complete list of accidents that could potentially occur as a result of the hazards identified, see, for example, Table 19.15.

Mitigation List

The mitigation list should detail the steps taken to reduce the probability of a hazard resulting in an accident or reduce the severity of an accident; see, for example, Table 19.16. We normally subdivide these into five aspects with an appropriate naming convention for each as follows:

Table 19.15 Typical accident list (partial).

AC-ID

Accident

Relevant HZ-ID

Summary

Severity

AC-01

Injury or death during takeoff

HZ-01

Death during the take-off phase, that is, from point when takeoff is commanded to point when aircraft is above head height. Exposure time approximately 10 s for each takeoff

Major

AC-02

Injury or death during landing

HZ-02

Caused by collision of aircraft with people on the ground while the aircraft is landing at a chosen location. Exposure time approximately 10 s for each landing

Major

AC-03

Injury or death while aircraft is on the ground

HZ-04

Caused by collision of aircraft with people on the ground while the aircraft is not in flight

Major

AC-04

Death due to mid-air collision

HZ-09,

HZ-10,

HZ-06,

HZ-05

This requires collision with a manned aircraft which results in the death of one or more of its occupants. Otherwise the accident is covered by AC-05 due to debris from the aircraft

Catastrophic

AC-10

Personnel accident due to exposure

HZ-18

This describes the situation where personnel suffer from an occupational illness due to wind chill and exposure

Minor

AC-11

Damage to local surroundings

HZ-06,

HZ-07,

HZ-08,

HZ-09

Damage to man-made surroundings (structures, vehicles, or vessels) or natural environment due to collision, fire, release of hazardous materials from aircraft/ancillary equipment, or debris from aircraft crash

Moderate

  • 1. MT-D-##. Mitigations implemented during the design of the aircraft;
  • 2. MT-P-##. Mitigations implemented during the planning of flight operations;
  • 3. MT-O-##. Mitigations implemented while operating the system;
  • 4. MT-E-##. Mitigations implemented through care of equipment and
  • 5. MT-H-##. Mitigations to ensure health and safety of personnel.

Table 19.16 Typical mitigation list (partial).

MT-ID

Mitigation

Reference or information

MT-D-01

Dual redundancy of avionics and batteries

System description

MT-D-02

Dual redundancy of propulsion system

System description

MT-D-03

Multiple servos and control surfaces per axis

System description

MT-P-01

Select site that allows a choice of take-off/landing directions to suit wind direction

Operations manual

MT-P-02

Safe climb and approach route within designated area

Operations manual

MT-O-01

Thorough pre-flight checks

Operations manual

MT-O-02

Takeoff and flight only in favorable meteorological conditions

Operations manual

MT-O-03

Limited fuel load: do not carry fuel far in excess of that required for the planned flight plus reserve

Operations manual

MT-E-01

Aircraft stored and transported in dedicated flight

cases

Operations manual

MT-E-02

Transmitter and GCS protected from damage (impact, moisture, sand, etc.) during transport/storage and operation

Operations manual

MT-E-03

Post-operation checks of equipment

Operations manual

MT-H-01

Continual assessment by HSE manager

Operations manual

MT-H-02

Warm and wind-proof clothing

Operations manual

MT-H-03

Ear protection to be worn if in close proximity to ground-running aircraft

Operations manual

 
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