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Posts Tagged ‘airworthiness directive’

Federal Aviation Administration (FAA) has “toughened a requirement that Boeing 737 pilots be reminded not to
ignore a cabin pressure warning horn, ordering pre-flight briefings as
well as changes in manuals.
” The reasoning for this new “airworthiness directive” is due to the Helios Airways Boeing 737-300 crash on August 14th 2005 that resulted in 121 deaths.

The directive affects all Boeing 737 models!

Read the Directive here at FAA.gov wesbsite.

Summary

We are adopting a new airworthiness directive (AD) for all Boeing Model
737 airplanes. This AD requires revising the airplane flight manual to
include a new flightcrew briefing that must be done before the first
flight of the day and following any change in flightcrew members, and
to advise the flightcrew of this additional briefing. This AD results
from continuing reports that flightcrews have failed to recognize and
react properly to the cabin altitude warning horn. We are issuing this
AD to prevent failure of the flightcrew to recognize and react properly
to a valid cabin altitude warning horn, which could result in
incapacitation of the flightcrew due to hypoxia (lack of oxygen in
body) and consequent loss of airplane control.

Justification

We are issuing this AD to prevent failure of the flightcrew to
recognize and react to a valid cabin altitude warning horn, which could
result in incapacitation of the flightcrew due to hypoxia (lack of
oxygen in body) and consequent loss of airplane control. This action
follows related rulemaking action we took in response to a report
resulting from the investigation by the Air Accident Investigation and
Aviation Safety Board of Greece into the August 14, 2005, Helios
Airways accident near Athens, Greece. This action affects the entire
fleet of Boeing Model 737 airplanes (nearly 5,000 airplanes worldwide);
these airplanes have a very high utilization rate. Because of our
requirement to promote safe flight of civil aircraft and thus the
critical need to assure that the flightcrew recognizes and reacts
properly to a valid cabin altitude warning horn and the compliance time
involved with this action, this AD must be issued immediately.

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