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Hazard List which lists all potential hazards identified during the evaluation. Each
hazard should be roughly categorized under the following Generic Hazard
listings :
1. Radiation (ionizing, electromagnetic, laser)
2. Toxic Materials/Contamination
3. Explosion/Implosion
4. Fire
5. Collision/Impact
6. Loss of Habitable Environment
7. Electrical Shock/Static Discharge
8. Injury and/or Illness
9. Temperature Extremes
10. Structural Failure
11. Corrosion
12. Any others which may not fall into any of the above categories.
It should be noted that there is some overlap in the above hazard categories and, in
some cases, it may not be readily obvious into which category a particular hazard has to
be grouped. The categorization of the hazards is not, in itself, critical, and, when the
correct category is unclear, the analyst should use his or her best judgement.
In addition to grouping the hazards into categories, each hazard should be identified by
a descriptive and concise hazard title which includes the hazard category (e.g., "Fire
Resulting From LO2 Leakage", "Toxic Material Release into Cabin", etc.…).
Hazard Analysis Appendix 1
Edition 5.2 A1.4
C. Hazard Report Preparation
The experimenter must prepare a Hazard Report for each of the hazards identified in
the above Hazard List. The format used for the Hazard Report is left to the discretion
of the experimenter. However, it may be convenient to use a format similar or identical
to the one shown in this appendix page A1.11. It should be noted that, whatever format
is used, the report must contain those topics identified in the shown format and include
supporting data.
The basic purpose of a Hazard Report is to document the safety analysis to assure that
all potential hazard causes have been addressed and adequate controls have been
implemented. The report should be of sufficient depth and detail so that technical
management personnel can determine if adequate hazard elimination or control has
been accomplished or if additional hazard resolution analysis is required. The
preparation of Hazard Reports should begin during the conceptual phase of the
experiment as hazards are identified and should continue throughout the experiment
life cycle. Hazard reports must be updated whenever changes to experiment design or
operations affect the hazard condition addressed in the report.
A description of the required contents of a Hazard Report follows :
1. Hazard title -
As stated in the last paragraph of Section B above, the title should be concise and
descriptive, and should include the applicable hazard category (per Section B).
Hazard Analysis Appendix 1
Edition 5.2 A1.5
2. Description of Hazard -
This section should briefly describe the potential hazard in terms of the risk to
flight test personnel and to the flight worthiness of the A300 Zero-G aircraft
structure and flight systems. The experimenter should take care to identify the
actual hazard as opposed to the hazard cause. For example, the overpressurization
of a tank is a hazard cause, whereas the possible explosion of the
tank (with the potential for catastrophic consequences) is the actual hazard. In the
same vein, a pressure relief valve (PRV) attached to the tank would constitute a
hazard control. A test showing that the valve actually opened at the required
pressure would provide verification that the control was adequate.
3. Hazard Causes -
This section of the hazard report should identify and itemize all potential events
or factors which could induce a specific hazard. Again, it is very important that
all possible causes be identified and analyzed. Referring to the example in
Section C2 above, the cause of the tank explosion could conceivably be any of
the following factors :
a. Tank inadvertently under-designed for maximum operating pressure
b. One or more tank weldings are defective
c. Tank not equipped with a PRV
d. The PRV fails to open at the correct pressure
e. Tank pressure gauge reading incorrectly
f. Tank failing because of error in operating procedure and/or software
g. Human error
h. Other possible factors not identified above
Hazard Analysis Appendix 1
Edition 5.2 A1.6
Each of the hazard causes identified above must be countered by one or more
specific Hazard Controls. These controls are discussed in the following section.
4. Hazard Controls -
Particular emphasis must be placed on thorough development of the contents of
this section of the Hazard Report. Hazard control statements must be :
• Specific
Do not generalize
• Complete
　
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