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· The conduct of maintenance operations such as: use of flammables, solvents, parts
cleaning, equipment accessibility, flammable materials, hangar fire protection
equipment.
· Aircraft movement in and around hangars, aprons, taxiways.
· Operations during inclement weather, snow removal airport accessibility, the use of
snow removal equipment.
· Accessibility of emergency equipment and emergency access of aircraft in the event of
a contingency or accident.
· Accessibility of emergency personnel and security personnel in securing and accessing
accident sites.
· Maintainability of airport surface equipment, such as, lighting, placarding and
marking, surface runway conditions.
· Control tower visibility
· Fire protection of physical facilities, electrical installation requirements, grounding and
bonding at facilities.
For further information concerning operating and support hazards and risks associated with aviation,
contact the FAA Office of System Safety.
FAA System Safety Handbook, Chapter 12: Facilities Safety
December 30, 2000
12 - 20
12.6 Facility Risk Analysis Methodology
After applying the various analysis techniques to identify risks, there are additional tasks involving: Risk
assessment, hazard control analysis, requirements cross-check analysis, and hazard tracking and risk
resolution.
12.6.1 Risk Assessment
Risk assessment is the classification of relative risk associated with identified hazards. Risk has two
elements, which are severity and likelihood. Severity is the degree of harm that would occur if an accident
happens. Likelihood is a qualitative expression of the probability that the specific accident will occur.
Criteria for severity and likelihood should be defined. When risk assessment is to be conducted, the risks
should be prioritized to enable resources to be allocated consistently to the highest risks.
An example of a risk assessment matrix is provided in Table 12-1. This matrix indicates the related hazard
code, hazard or scenario description, and scenario code. Both initial risk and final risk associated with the
specific scenario is also indicated. There is also a section for supportive comments.
FAA System Safety Handbook, Chapter 12: Facilities Safety
December 30, 2000
12 - 21
Table 12-1: Risk Assessment Matrix Example
HAZ
CODE
HAZARD
DESCRIPTION
SCENARIO
CODE
SCENARIO
INITIAL
RISK
SUPPORT
COMMENTS
RESIDUAL RISK
H1.1 Technicians may be
inadvertently exposed to
core high voltage when
maintaining the monitor on
the work bench.
This hazard is
due to the “hot
swap” LRU
replacement
philosophy.
S1.1.1
While accessing core a technician
inadvertently contacts high
voltage. This can result in
possible fatality.
IC IE
S1.1.2 While accessing core a technician
inadvertently contacts high
voltage. This can result in
possible major injury.
ID IE
S1.1.3 A technician does not follow
appropriate de-energizing or
grounding procedures resulting in
inadvertent contact, electrical
shock causing fatality.
IC IE
S1.1.4 A technician does not follow
appropriate de-energizing or
grounding procedures resulting in
inadvertent contact, electrical
shock causing major injury.
ID IE
FAA System Safety Handbook, Chapter 12: Facilities Safety
December 30, 2000
12 - 23
Table 12-2 Hazard Tracking Log Example: LOCATION: Building 5 Paint Booth
ITEM/FUNCTION PHASE HAZARD CONTROL CORRECTIVE ACTION
& STATUS
Cranes
(2) 1000 LB
(top of paint booth frame)
Lifting Loads exceed crane hoist
capacity.
Rated capacity painted on both
sides if Figures readable from
the floor level. Ref. Operating
Manual....
Closed.
Use of cranes limited by
procedure to loads less
than 600 lbs.
Crane
(1) 10,000 LB bridge
(In front of paint booth)
Lifting Loads exceed crane hoist
capacity.
All bridge cranes proof loaded
every 4 years. Certification tag
containing date of proof load,
capacity, and retest date located
near grip.
Closed.
No anticipated loads
exceed 5000 lbs.
Lifting Loss of control through
operator error.
All crane operators qualified
and authorized by floor
supervisor.
Cranes equipped with braking
devices capable of stopping a
load 1 1/4 X rated load.
Closed.
High Pressure Air Lines
100 LB
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