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safely diverted to ZZZ where the right engine oil filler
cap was found slightly dislodged. This cap needs either
a redesign or modification to prevent a much more
serious emergency in the future...
The Controller’s Corner
An Air Traffic Controller’s report to ASRS
shows how pilots’ use of vague terminology
can cause concern in an atmosphere of
increased security.

We recently experienced two incidents in
which pilots have used vague terms when
describing conditions affecting their aircraft.
In one case, the pilot was on the ground and
reported [that] he had “issues” before leaving the frequency
for an extended period of time while on a taxiway. In the
second instance, the pilot made reference to “a situation”
while airborne. The pilot wanted to circle the airport for an
unspecified period of time, but was not specific regarding
why he needed to circle. In both cases, the controllers and
supervisors-in-charge had concerns about the safety of the
flight crew and passengers... Fortunately, neither case
involved unlawful interference. However, the words used by
the pilots certainly raised suspicions and concerns among
ATC personnel...
Pilots should be aware that vague references might be
misinterpreted as a pilot attempting to covertly alert ATC to
an instance of unlawful interference. Now, more than
ever...communication is key to ensuring that ATC does not
overreact to a minor problem or, even worse, under-react
to a life threatening condition.
A Monthly Safety Bulletin
from
The Office of the NASA
Aviation Safety Reporting
System,
P.O. Box 189,
Moffett Field, CA
94035-0189
http://asrs.arc.nasa.gov/
ASRS Recently Issued Alerts On…
B757 lavatory fire incident
Homebuilt Kitfox rubber tubing failure
CL65 uncommanded nose gear retraction
Published SID discrepancy at a Mexican airport
An international airport’s taxiway signage and marking
October 2002 Report Intake
Air Carrier / Air Taxi Pilots 1914
General Aviation Pilots 741
Controllers 51
Cabin/Mechanics/Military/Other 114
TOTAL 2820
Number 278 November 2002
While there have only been scattered flurries of weatherrelated
ASRS reports recently, the forecast is for
increasing intensity over the next few months. On the
brighter side, ASRS Analysts do see a chance for
significant clearing of embedded gray cells and foggy
“…We were going to have to find the runway regardless of the weather”
This “chilling” statement reflects the gravity of the
situation encountered by an instructor and student in an
ice-encumbered Cessna 172. Knowing the limitations of
one’s aircraft and having a respect for the forces of nature
are two universal lessons learned by the instructor who
submitted this report.

The [Cessna 172] began to accumulate light rime ice in
cruise at 10,000 feet… Icing became increasingly heavier
until…we were having difficulty maintaining altitude.
Departure [said] he needed us to maintain 10,000 feet. I
told him we were picking up ice and requested vectors [to
the] ILS Runway 35 at XXX… We checked in with the
Tower [and we were] cleared to land. Icing was moderate
at that point. We had full throttle at 70 KIAS and [we
were] descending 400 feet per minute. We were unable to
maintain approach minimums, and at one point Tower
Cool Controller Stops a Snowballing Situation
Quick work by a sharp Center Controller not only helped
an MD-80 crew out of a bad situation, but also prevented
a “chain reaction” of traffic conflicts. This first report
gives the Controller’s perspective.

The aircraft was in level flight at FL350, with some
deviations off course due to weather. At INTXN the pilot
unexpectedly announced, “We need to change altitude right
now.” Since I did not control the airspace below FL350, I
was unable to provide a descent clearance right away. The
pilot initiated a descent and I advised the pilot that I was
declaring an emergency and to please fill me in on the
situation when circumstances permitted…Subsequent
discussion with the pilot indicated that the aircraft was
unexpectedly unable to maintain altitude… The pilot
asked for and received clearance to FL310. Because I was
sitting immediately adjacent to the controller [handling]
airspace below me, I was able to coordinate the un-cleared
descent quickly enough to avoid cascading problems with
other aircraft.
memories provided there is heavy participation in a
　
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