曝光台 注意防骗
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important to notice details. Note altitude, vector, and
position, and any details on the target, such as range and
relative altitude when writing up the incident. Accurate
information is essential for TCAS experts to try to
reconstruct and analyze problems.
Technical information about TCAS suppression bus
failure was provided by Kevin Fehr of the FAA’s William
J. Hughes Technical Center.
The Eyes Have It
Our feature on TCAS would be incomplete without an
important reminder – that see-and-avoid vigilance is
the last line of defense against close encounters of an
unwanted kind. FAR 91.113(b) spells out this requirement:
When weather conditions permit, regardless of whether
an operation is conducted under instrument flight rules
or visual flight rules, vigilance shall be maintained
by each person operating an aircraft so as to see and
avoid other aircraft...
This means that it’s important for pilots to keep their
heads on a swivel and their visual scan going – no matter
what other aids to traffic separation they may have.
“We Didn’t Have the Luxury of a TCAS RA”
As an example of the importance of see-and-avoid, a B737
Captain describes a near-miss on a busy departure route
– in spite of having TCAS II on board:
■ ...After clean-up and checklist completion, I settled into
the climb, alert and heads up leaving an extremely busy
airport. About 7-8 miles out, climbing through 3,000 feet
MSL, I looked ahead and observed a small aircraft, dead
ahead, same direction, and an obvious potential conflict.
Our closure rate was fast, and the First Officer, the Pilot
Flying, never fixed on him until I began initiating an
evasive maneuver. We jointly executed a very smooth slight
left turn and slight pitch up and watched the aircraft pass
just below and to the right of our flight path. Because of
snow-covered mountain backdrop, it was extremely difficult
to spot this aircraft. Because this operator chooses to
operate their aircraft with no transponder, we didn’t have
the luxury of a TCAS Resolution Advisory (RA)...There
Number 322 October 2006
At ASRS, just when we think we’ve seen it all,
strange and unusual reports arrive to tantalize
our analyst staff. Not routine tales of suspense – a
flapless takeoff, icing in Very Moist Conditions,
or smoke in the hold. Uncanny experiences from
the outer limits of aviation unfold – and the safety
lessons learned as well.
Brave readers, gather round, as these travelers
relate their spooky tales. And if these stories seem
improbable and odd, remember this:
“Truth is stranger than fiction.”
Attack of the Night Invader
During a busy nighttime departure, the First Officer was
flying the aircraft while the Captain worked weather radar
and coordinated weather deviation vectors with ATC. The
fast-climbing B747 had been cleared to climb and maintain
5,000 feet. The Captain had just given the “4,000 to 5,000”
call, when a bizarre distraction occurred:
■ ...Just then we received a call from ATC. Just as the
controller began speaking, a very large moth (approximately
2 inches in diameter) flew out from behind the instrument
panel directly in my face. The whole crew was suddenly
distracted by this, as I dropped the hand microphone in
my reflex reaction to this moth’s attack on my face. I believe
he may have been attracted to the map light directly above
my head. I leaned forward to retrieve the hand microphone
from the floor, and just then heard the altitude warning
system activate. I immediately looked up at the altitude
and saw 5,340 feet. The First Officer was already pushing
forward aggressively on the yoke, and I assisted. We
immediately restored the aircraft to 5,000 feet...
[This incident] was...a stark reminder to all that the
flying pilot needs to focus on flying the plane, even under
the most bizarre of all possible distractions...The sudden
appearance of an invading moth flying into the Captain’s
face was not briefed, and its timing was at a point where
even the slightest pause in attention to primary duties can
jeopardize the safety of our flight...
St. Elmo’s Fire – And Aftermath
St. Elmo’s Fire is an eerie form of atmospheric electricity
that can appear in stormy weather around church spires,
ship’s masts, airplane wings, and other conductors. For a
B757 flight crew, the appearance of St. Elmo’s Fire was a
prelude to gremlins in the electrical system. More from the
Captain’s report:
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