Human Factors in Aviation and Murphy's Law
Module 09
HUMAN
FACTORS
for B1 & B2 certification
GENERAL
THE PEAR MODEL OF HUMAN
FACTORS IN MAINTENANCE
Aviation accidents are often attributed to human error (Human Factors).
For several years, in fact, industry have been working hard to minimize
these factors and reduce the risk of accidents. These efforts encompass
all aviation sectors.
33% Non-compliance with basic rules by pilots
26% Lack of cross-checks by the co-pilot
13% Design errors
12% Maintenance and inspection gaps
10% Failure during the approaching procedure support
10% Pilot ignores the warnings of the crew
9% Flight controller errors
9% Crew Improper behavior in case of extraordinary situations
8% Incomplete or misleading weather forecast
8% Hazards on the taxiway
7% Lack of communication by the air traffic controllers
6% Incorrect landing procedure
MURPHY LAW
The first test produced a zero reading; upon examination, it was determined that
all four sensors were connected incorrectly. On each of the four sensors, there
were two possible ways to connect the wires; and on all four sensors, the wires
were hooked up incorrectly!
-Murphy was very upset and blamed the technician for the foul up. He
supposedly said “If there are two ways to do something, and one will result in
disaster, he’ll do it that way”.
Source: Improbable Research
-Colonel Stapp recognized the importance of Murphy’s comments, and when
talking to the press, attributed the successes and the sled team’s safety record to
“Murphy’s Law”. He explained Murphy’s Law as “whatever can go wrong, will go
wrong”, and if you can anticipate problems, disaster can be averted
MURPHY LAW
-Failures in aviation and space exploration can be extremely costly. In one
unmanned orbiting vessel, (ironically) a set of sensors were all connected
incorrectly. When the sensors failed to operate as designed, the parachutes
that
were to slow down the spacecraft didn’t open.
-Because of costly failures, designers have installed “fail safes”.
-Fail safes are referred to as “idiot proof”. But Murphy’s Law always seems to
strike, even when precautions have been put in place; resulting in “Grave’s
Law”,
which states, if you make something idiot proof, the world will create a better
idiot”.
-So what can we learn from this in relation to Human Factors? We can use
Murphy’s Law as a tool, if we expect things to go wrong and put maintenance
safety culture into action, just like Murphy’s sled team, a good safety record
can
be maintained
Aviation accidents are often attributed to human error, with factors such as non-compliance, lack of cross-checks, design errors, maintenance gaps, and more contributing to risks. Murphy's Law highlights the inevitability of things going wrong, emphasizing the importance of anticipating problems to prevent disasters. Fail-safes in aviation and space exploration aim to mitigate costly failures, yet Murphy's Law persists, underscoring the need for a robust safety culture. By incorporating Murphy's Law as a tool and fostering maintenance safety practices, a strong safety record can be upheld.
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Presentation Transcript
Module 09 HUMAN FACTORS for B1 & B2 certification
THE PEAR MODEL OF HUMAN FACTORS IN MAINTENANCE
Aviation accidents are often attributed to human error (Human Factors). For several years, in fact, industry have been working hard to minimize these factors and reduce the risk of accidents. These efforts encompass all aviation sectors. 33% Non-compliance with basic rules by pilots 26% Lack of cross-checks by the co-pilot 13% Design errors 12% Maintenance and inspection gaps 10% Failure during the approaching procedure support 10% Pilot ignores the warnings of the crew 9% Flight controller errors 9% Crew Improper behavior in case of extraordinary situations 8% Incomplete or misleading weather forecast 8% Hazards on the taxiway 7% Lack of communication by the air traffic controllers 6% Incorrect landing procedure
MURPHY LAW The first test produced a zero reading; upon examination, it was determined that all four sensors were connected incorrectly. On each of the four sensors, there were two possible ways to connect the wires; and on all four sensors, the wires were hooked up incorrectly! -Murphy was very upset and blamed the technician for the foul up. He supposedly said If there are two ways to do something, and one will result in disaster, he ll do it that way . Source: Improbable Research -Colonel Stapp recognized the importance of Murphy s comments, and when talking to the press, attributed the successes and the sled team s safety record to Murphy s Law . He explained Murphy s Law as whatever can go wrong, will go wrong , and if you can anticipate problems, disaster can be averted
MURPHY LAW -Failures in aviation and space exploration can be extremely costly. In one unmanned orbiting vessel, (ironically) a set of sensors were all connected incorrectly. When the sensors failed to operate as designed, the parachutes that were to slow down the spacecraft didn t open. -Because of costly failures, designers have installed fail safes . -Fail safes are referred to as idiot proof . But Murphy s Law always seems to strike, even when precautions have been put in place; resulting in Grave s Law , which states, if you make something idiot proof, the world will create a better idiot . -So what can we learn from this in relation to Human Factors? We can use Murphy s Law as a tool, if we expect things to go wrong and put maintenance safety culture into action, just like Murphy s sled team, a good safety record can be maintained
