FAA-H-8083-25C · Source PDF page 49
Aeronautical Decision-Making
Human Factors · PHAK page 2-10
Searchable transcription
• Emotional pressure associated with acknowledging • Advise those who are waiting at the destination that
that skill and experience levels may be lower than a the arrival may be delayed. Know how to notify them
pilot would like them to be. Pride can be a powerful when delays are encountered.
external factor!
• Manage passengers’ expectations. Make sure
passengers know that they might not arrive on a firm
Managing External Pressures
schedule, and if they must arrive by a certain time,
Management of external pressure is the single most important they should make alternative plans.
key to risk management because it is the one risk factor
• Eliminate pressure to return home, even on a casual
category that can cause a pilot to ignore all the other risk
day flight, by carrying a small overnight kit containing
factors. External pressures put time-related pressure on the
prescriptions, contact lens solutions, toiletries, or other
pilot and figure into a majority of accidents.
necessities on every flight.
The use of personal standard operating procedures (SOPs) is
The key to managing external pressure is to be ready for
one way to manage external pressures. The goal is to supply a
and accept delays. Remember that people get delayed when
release for the external pressures of a flight. These procedures
traveling on airlines, driving a car, or taking a bus. The pilot’s
include but are not limited to:
goal is to manage risk, not create hazards. [Figure 2-7]
• Allow time on a trip for an extra fuel stop or to make
an unexpected landing because of weather.
Human Factors
• Have alternate plans for a late arrival or make backup
Why are human conditions, such as fatigue, complacency
airline reservations for must-be-there trips.
and stress, so important in aviation? These conditions, along
• For really important trips, plan to leave early enough with many others, are called human factors. Human factors
so that there would still be time to drive to the directly cause or contribute to many aviation accidents and
destination, if necessary.
Pilot Aircraft
A pilot must continually make decisions about competency, A pilot will frequently base decisions on the evaluations of the
condition of health, mental and emotional state, level of fatigue, aircraft, such as performance, equipment, or airworthiness.
and many other variables. For example, a pilot may be called
early in the morning to make a long flight. If a pilot has had only During a preflight, a pilot noticed a small amount of oil dripping
a few hours of sleep and is concerned that the congestion from the bottom of the cowling. Although the quantity of oil
being experienced could be the onset of a cold, it would be seemed insignificant at the time, the pilot decided to delay the
prudent to consider if the flight could be accomplished safely. takeoff and have a mechanic check the source of the oil.
The pilot’s good judgment was confirmed when the mechanic
A pilot had only 4 hours of sleep the night before being asked found that one of the oil cooler hose fittings was loose.
by the boss to fly to a meeting in a city 750 miles away. The
reported weather was marginal and not expected to improve.
After assessing fitness as a pilot, it was decided that it would External pressures
not be wise to make the flight. The boss was initially unhappy, The interaction between the pilot, airplane, and the environment
but later convinced by the pilot that the risks involved were is greatly influenced by the purpose of each flight operation.
unacceptable. The pilot must evaluate the three previous areas to decide on
the desirability of undertaking or continuing the flight as planned.
It is worth asking why the flight is being made, how critical is it to
Environment
maintain the schedule, and is the trip worth the risks?
This encompasses many elements not pilot or airplane related.
It can include such factors as weather, air traffic control, On a ferry flight to deliver an airplane from the factory, in
navigational aids (NAVAIDS), terrain, takeoff and landing marginal weather conditions, the pilot calculated the
areas, and surrounding obstacles. Weather is one element that groundspeed and determined that the airplane would arrive at
can change drastically over time and distance. the destination with only 10 minutes of fuel remaining. The pilot
was determined to keep on schedule by trying to “stretch” the
A pilot was landing a small airplane just after a heavy jet had fuel supply instead of landing to refuel. After landing with low
departed a parallel runway. The pilot assumed that wake fuel state, the pilot realized that this could have easily resulted
turbulence would not be a problem since landings had been in an emergency landing in deteriorating weather conditions.
performed under similar circumstances. Due to a combination This was a chance that was not worth taking to keep the
of prevailing winds and wake turbulence from the heavy jet planned schedule.
drifting across the landing runway, the airplane made a hard
landing. The pilot made an error when assessing the flight
environment.
Figure 2-7. The PAVE checklist.
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