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OCR for page 91
Appendix A
Win~l-Shear PlREPs
The following is an excerpt from the FAA's Airman's Information Manual,
Chapter 6, Section 1, METEOROLOGY, Paragraph 523, Wind-Shear PIREPS.
b.
EXAMPLE:
Because unexpected changes in wind speed and direction can be
hazardous to aircraft operations at low altitudes on approach
to and departing from airports, pilots are urged to volunteer
reports to controllers of wind shear conditions they encounter.
An advance warning of this information will assist other pilots
in avoiding or coping with a wind shear on approach or
departure.
When describing conditions, use of the terms "negative" or
"positive" wind shear should be avoided. PIREPS of "negative
wind shear on final," intended to describe loss of airspeed
and lift, have been interpreted to mean that no wind shear was
encountered. The recommended method for wind shear reporting
is to state the loss or gain of airspeed and the altitudes at
which it was encountered.
DENVER TOWER, CESSNA 1234 ENCOUNTERED WIND SHEAR, LOSS of 20
KNOTS AT 400 FEET.
EXAMPLE:
TULSA TOWER, AMERICAN 721 ENCOUNTERED WIND SHEAR ON FINAL,
GAINED 25 KNOTS BETWEEN 600 AND 400 FEET FOLLOWED BY LOSS OF 40
KNOTS BETWEEN 400 FEET AND SURFACE.
(1) Pilots who are not able to report wind shear in these
specific terms are encouraged to make report in tens of the
effect upon their aircraft.
EXAMPLE:
MIAMI TOWER, GULFSTREAM 403 CHARLIE ENCOUNTERED AN ABRUPT WIND
SHEAR AT 800 FEET ON FINAL, MAX THRUST REQUIRED.
(2) Pilots using Inertial Navigation Systems should report the
wind and altitude both above and below the shear level.
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Representative terms from entire chapter:
encountered wind
