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All operations Pressure lines not properly
identified.
Facility Safety Manual, Section
... requires all pressure lines to
be coded to ANSI A.13.1
standards.
Closed.
Lines identified and coded.
Facility Access All operations Injury to personnel due to
emergency pathways
blocked with dollies,
cabinets, and stored
hardware.
Reference Facility Safety
Manual, Section ...., “Fire
equipment, aisles, and exits
shall be kept free of
obstructions.”
Closed.
Area Manager is charged
with instructing personnel
on requirements and
conducting daily audits.
FAA System Safety Handbook, Chapter 12: Facilities Safety
December 30, 2000
12 - 24
12.6.2 Hazard Control Analysis
To compare the generic hazards with those of a specific system, the maintenance procedures published for
the system are formatted into a matrix (See Table 12 - 2). The matrix should list the detailed maintenance
procedures and could serve as a method for correlating the hazards and controls with the discrete tasks to
be performed on the system. Hazards specific to the system that have not included in the maintenance
procedures are also to be identified during this step of the evaluation and integration.
A matrix will be used to document and assess the following:
·  Changes needed to eliminate or control the hazard or reduce the associated risk
·  Requirements for design enhancements, safety devices, and equipment, including
personnel safety
·  Warnings, cautions, and special emergency procedures (e.g., egress, escape, render
safe, or back-out procedures), including those necessitated by failure of a computer
software-controlled operation to produce the expected and required safe result or
indication
·  Requirements for packaging, handling, storage, transportation, maintenance, and
disposal of hazardous materials
·  Requirements for safety training.
·  Potentially hazardous system states
·  Federal laws regarding the storage and handling of hazardous materials.
Requirements Cross-Check Analysis
A requirements cross-check analysis should be performed in conjunction with the O&SHA (See Table 12-
3). Any appropriate requirements that are applicable to specific hazard controls are to be provided as a
technical reference. Any hazard control that is formally implemented becomes a specific requirement.
Requirements cross-check analysis is a common technique in the system safety engineering discipline. A
hazard control is considered verified when it is accepted as a formal program requirement through a
process known as hazard tracking and risk resolution.
The requirement cross check analysis is a technique that relates the hazard description or risk to specific
controls and related requirements. TABLE 12.-3 is an example of a requirement cross check analysis
matrix. It is comprised of the following elements: hazard description code, hazard description, or accident
scenario, the hazard rationale, associated with a specific exposure or piece of equipment. The matrix also
displays a control code, hazard controls, and it also provides reference columns for appropriate requirement
cross check. For this example, OSHA requirements, FAA requirements and National Fire Protection
Association requirements are referenced.
FAA System Safety Handbook, Chapter 12: Facilities Safety
December 30, 2000
12 - 25
TABLE 12-3 REQUIREMENTS CROSS-CHECK ANALYSIS
HAZ
CODE
HAZARD
DESCRIPTION
HAZARD
RATIONALE
CON
CODE
CONTROL
OSHA
29CFR 1900
FAA-G-
2100F
HUMAN
FACTORS
NFPA
Code
(MIL-STD-
1472)
1. Electrical
H1.1 Technicians may be
inadvertently exposed to
core high voltage when
maintaining the monitor on
the work bench.
This hazard is not
appropriate to the system
because of the LRU
replacement maintenance
philosophy.
C1.1 Technician should not
access high voltage
core without special
authorization and
training.
1910.303(h)(I) 5.10.5 70E, 2-2.1
C1.2 Stored energy within
the core must be
removed via grounding
prior to initiating work
(suspect that
manufacturers will be
repairing faulty
monitors)
1910.147(d)(5) 3.1.2.7
3.3.6.1.1
12.4.3 70B, 10-3.1
& 5-4.2.1
NFPA 70
460-6
FAA System Safety Handbook, Chapter 12: Facilities Safety
December 30, 2000
12 - 26
TABLE 12-3 REQUIREMENTS CROSS-CHECK ANALYSIS
HAZ
CODE
　
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