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Basic Definitions. CAPT James R. Fraser Naval Safety Center. The Naval Aviation Safety Program. To preserve human and material resources and eliminate hazards OPNAVINST 3750.6R. Definitions. HAZARD Cause of damage or injury Synonymous with mishap cause factors UNDER HUMAN CONTROL

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basic definitions


CAPT James R. Fraser

Naval Safety Center

the naval aviation safety program
The Naval AviationSafety Program
  • To preserve human and material resources and eliminate hazards
  • OPNAVINST 3750.6R
    • Cause of damage or injury
    • Synonymous with mishap cause factors
    • All hazards can be eliminated
    • Prerequisite for classification as mishap
    • Aircraft brakes released, or first motion of cat
    • Until taxi clear of runway or weight on wheels
what is a naval aircraft mishap
What is a Naval Aircraft Mishap?
  • Unplanned events involving Naval air:
    • $10,000 or more of damage
    • Injury causing at least one lost workday
  • Exceptions:
    • Intentional
    • Criminal damage
    • FOD
    • Occupational illness
    • Injury during planned egress
when is a mishap over
When is a Mishap Over?
  • If fires are out and the area is safe
  • If pyrotechnics are secured
  • If survivors are safely rescued
  • If severely injured survivors are under medical care
  • If fatalities have been recovered
damage and injury
Damage and Injury
  • Mishap damage or injury
  • “Other” damage or injury
    • Damage less than that of a mishap
    • In the course of a mishap, not causal
  • Physical Injuries
    • Bodily harm while involved with Naval Air, resulting in:
      • Fatality
      • Permanent total disability
      • Permanent partial disability
      • One or more lost workdays
injury classification
Injury Classification
  • Fatal Injury
  • Permanent Total Disability
  • Permanent Partial Disability
injury classification8
Injury Classification
  • Permanent Total Disability
    • Results in total incapacitation OR
    • Loss of both hands, both eyes
  • Permanent Partial Disability
    • Results in permanent impairment OR
    • Loss of any part of the body, great toe, thumb, with exceptions:
      • Teeth
      • Four smaller toes
      • Distal phalanx of any finger, 2 of little finger
      • Repairable hernia
      • Subcutaneous tissue
injury classification9
Injury Classification
  • Lost Workday Injury: an injury resulting in one or more lost workdays
    • Major:
      • >5 lost workdays, requires hospitalization OR
      • Unconsciousness >5 minutes due to head trauma
      • Fx of any bone
      • Traumatic dislocation of major joints
      • Moderate to severe lacs resulting in hemorrhage
      • Injury to any internal organ
      • Any 3rd degree burn, or 1st/2nd over 5%
    • Minor:
      • Injury less than major, results in >1 lost workday
injury classification10
Injury Classification
  • First Aid Injury
  • No Injury
  • Lost at Sea/Missing
  • Missing/Unknown
class a mishap
Class A Mishap
  • Aircraft destroyed or missing
  • Fatality or
  • Permanent Total Disability
  • Total cost $1,000,000
class b mishap
Class B Mishap
  • An injury resulting in permanent partial disability
  • Hospitalization of 5 or more personnel
  • Total cost $200,000 to $1,000,000
class c mishap
Class C Mishap
  • An injury resulting in one or more lost workdays
  • Total cost $10,000 to $200,000
mishap categories
Mishap Categories
  • Flight Mishap
    • $10,000 or more damage
    • Intent for Flight
  • Flight Related Mishap
    • Less than $10,000 aircraft damage
    • Intent for Flight
    • $10,000 total damage or injury
  • Aircraft Ground Mishap
    • No intent for flight
    • $10,000 total damage or injury

Aircraft Mishap Board

  • Each Naval FM, FRM, and AGM shall be investigated in accordance with 3750.6 by an Aviation Mishap Board (AMB)
  • Mishap investigation and reporting shall take precedence over all other duties of members

Aircraft Mishap Board

  • Membership: Minimum of 4:
    • Flight surgeon
    • Aviation Safety Officer
    • Officer qualified in aircraft maintenance
    • Officer qualified in aircraft operations

Aircraft Mishap Board

  • Personnel directly involved in the mishap shall not serve on the AMB
  • For mishaps involving aircraft with crew, at least one member of AMB shall be NATOPS-qualified pilot
  • Individual with personal interests that might conflict with impartial AMB duties shall not be assigned to AMB

Aircraft Mishap Board

  • Under no circumstances may an expected endorser of an MIR serve as an AMB member
  • AMB members may not serve on other investigations (JAG)

Aircraft Mishap Board

  • Officers from other services are authorized to serve on AMB, but may not be the Senior Member
  • Individuals whose expertise is not needed may be excused at the prerogative of the Senior Member

Aircraft Mishap Board

The Senior Member

  • Naval Aviator or Naval Flight Officer
  • Senior to the PIC and Mission Commander involved in the mishap
  • On all Class As, appointed by aircraft controlling custodian
  • On all Class As, Grade O-5 or higher and a graduate of ASO/ASC

Aircraft Mishap Board

  • Each squadron maintains a standing AMB to immediately assume investigation responsibilities
  • It may be replaced entirely, in part, or not at all
  • Members shall maintain knowledge of 3750.6, Guide to Mishap Investigation, squadron safety program, and squadron premishap plan


  • One of the AMB’s most important tools
  • Responsibility of each AMB member to understand:
  • Information from AMB’s work is privileged
  • May be used only to improve Naval Aviation safety

Consultants to the AMB

  • Often requires the services of specialized personnel
    • Technical reps
    • Medical experts
  • Only necessary information will be given to consultants
  • Privileged information will be limited to AMB members
hazard reporting
Hazard Reporting
  • Purposes of HAZREPS
    • Report hazard and action taken
    • Report hazard and recommend corrective action
    • Report hazard so corrective action can be determined

Hazard Report or MIR?


  • Potential hazard only
  • Actual damage or injury < mishap level
  • If discovered during mishap investigation
    • Not a causal factor of mishap, and
    • NOT causal of other damage or injury


  • Actual damage or injury at mishap level
  • If discovered during mishap investigation
    • Not a causal factor of mishap, but
    • Causal of other damage or injury

Hazard Reports with

Special Formats

  • Bird (and bat) strikes
  • Near midair collisions
  • Embarked landing hazards
  • Physiological episodes

Physiological Episode

Hazard Reporting

  • Proven or suspected hypoxia
  • CO poisoning/toxic exposure
  • Decompression sickness/trapped gas reaction
  • Hyperventilation
  • Spatial disorientation
  • Loss of consciousness
  • Rapid decompression to FL 250
  • Other physiological problems


  • May be sent to NSC only if reluctant to report
  • All severe risk HAZREPS within 24 hrs
    • All others within 30 days