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[practice]…(of the controller needing to know if a
gate is open at the most intense and critical phase
of flight) must not be continued. It is an unsafe
practice and deters us from conducting a safe
flight.” (ACN 114244)
The Culprits
The way in which the sterile cockpit rule was broken in each report
was tallied and analyzed. Some reports contained more than one
culprit. Many of the reports contained acknowledgments like this:
“If we [had] adhered to the sterile cockpit, this situation probably
would not have occurred.” (ACN 118974)
Following are the four most common reasons for non-adherence to
the sterile cockpit rule:
Extraneous Conversation
The most habitually cited offense was extraneous conversation
between cockpit crew members. Cited one First Officer:
“Although VMC on the approach, the new special weather was…
[indefinite ceiling, 200 obscured, visibility 1-1/4 mile in ground fog],
snow falling and some snow on the runway...I was flying and
Captain viewing PIT stadium and various sights out the window,
chatting incessantly...Captain then reviewed procedures for short
ground roll on snow covered runways and returned to miscellaneous
conversation.” The crew believed that they then landed
without contacting the tower and receiving landing clearance.
After some serious soul searching, this reporter continued “...the
potential for disaster scenarios should be apparent...The bottom
line: lack of professionalism. Captain habitually rambled from
push back to block-in through a four day trip. This was the first of
two incidents on the same day...Below the line: lack of courage. F/O
and F/E were not willing to ask the Captain to please shut up so we
could fly the airplane.” (ACN 102595)
The Captain of an air carrier aircraft admits to conversation not
pertinent to flying duties:
“...Both the F/O and I became distracted because of a conversation
that was started before the level-off. At 4300 feet our altitude alert
system went off...Our sterile cockpit procedures should have
eliminated this problem if properly followed.” (ACN 168474)
Five reports detailed extraneous conversation with jump seat riders.
The ability to ride on an air carrier’s jump seat is quite a valuable
privilege, but it is important that the additional cockpit rider not be
allowed to create distractions. A look at two of these reports:
“While descending into a broken deck of clouds, unannounced
traffic appeared at 12 o’clock and less than a mile, climbing up our
descent path. In my best estimation we were on a collision course. I
immediately, without hesitating, instinctively pushed the aircraft
nose down and to the right to avoid impact. The Captain was
engaged in a conversation with [somebody] on the jump seat.” (ACN
167026)
20 Issue Number 4
Cockpit Chatter Leads to Crash
From Flight Safety Foundation’s August  Flight Safety Digest (Accident/Incident Briefs)
DHC Dash 7. Aircraft Destroyed. Thirty-six fatalities.
The four-engine Dash 7 was on an instrument approach to Runway 04 when it crashed into high
terrain about five nautical miles from the airport. At the time of the crash, the aircraft was slightly off
course and flying at an altitude of 560 feet MSL (mean sea level). The published minimum altitude
at the area of impact was 1,200 feet MSL.
A subsequent investigation indicated that the pilot was having a conversation with a passenger who
was sitting on the jump seat. The report said the crew was likely distracted by the conversation. The
report cited the pilot and copilot for poor airmanship in not monitoring altitude and course information.
Distractions from Flight Attendants
Distractions caused by flight attendants visiting the cockpit or
calling on the interphone were noted in almost one quarter of the
reports in our data set. This was our second highest source of
deviation from the sterile cockpit rule.
“As aircraft approached Runway 18, Flight Attendant ‘A’ entered
cockpit with coffee for the crew. Crew attention momentarily
diverted...Aircraft penetrated hold line approximately six feet for
Runway 18...Small single engine aircraft on final for Runway 18
was instructed to go around by Tower...Probable cause of this was
short taxi distance to hold line and crew’s interruption by [the]
Flight Attendant.” (ACN 149054)
In another incident, the crew was surprised when they lined up with
the wrong runway — and doubly surprised when they noticed they
were in an unplanned formation with a jet landing on the same
　
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