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Aeronautical Information Manual (AIM), page 710

Pilot/Controller Glossary 12/10/15

TARMAC DELAY- The holding of an aircraft on the
ground either before departure or after landing with
no opportunity for its passengers to deplane.

TARMAC DELAY AIRCRAFT- An aircraft whose

pilot-in-command has requested to taxi to the ramp,

gate, or alternate deplaning area to comply with the

Three-hour Tarmac Rule.

TARMAC DELAY REQUEST- A request by the
pilot-in-command to taxi to the ramp, gate, or
alternate deplaning location to comply with the
Three-hour Tarmac Rule.

TAS-
(See TERMINAL AUTOMATION SYSTEMS.)
TAWS-
(See TERRAIN AWARENESS WARNING
SYSTEM.)

TAXI- The movement of an airplane under its own
power on the surface of an airport (14 CFR
Section 135.100 [Note]). Also, it describes the
surface movement of helicopters equipped with
wheels.
(See AIR TAXI.)

(See HOVER TAXI.)

(Refer to 14 CFR Section 135.100.)

(Refer to AIM.)
TAXI PATTERNS- Patterns established to illustrate
the desired flow of ground traffic for the different
runways or airport areas available for use.

TCAS-
(See TRAFFIC ALERT AND COLLISION
AVOIDANCE SYSTEM.)

TCH-
(See THRESHOLD CROSSING HEIGHT.)

TCLT-
(See TENTATIVE CALCULATED LANDING
TIME.)

TDLS-

(See TERMINAL DATA LINK SYSTEM.)

TDZE-
(See TOUCHDOWN ZONE ELEVATION.)
TELEPHONE INFORMATION BRIEFING SER-
VICE- A continuous telephone recording of
meteorological and/or aeronautical information.
(Refer to AIM.)

TEMPORARY FLIGHT RESTRICTION (TFR) - A
TFR is a regulatory action issued by the FAA via the
U.S. NOTAM System, under the authority of United
States Code, Title 49. TFRs are issued within the

sovereign airspace of the United States and its

territories to restrict certain aircraft from operating

within a defined area on a temporary basis to protect

persons or property in the air or on the ground. While
not all inclusive, TFRs may be issued for disaster or
hazard situations such as: toxic gas leaks or spills,
fumes from flammable agents, aircraft accident/in-
cident sites, aviation or ground resources engaged in
wildlife suppression, or aircraft relief activities
following a disaster. TFRs may also be issued in
support of VIP movements; for reasons of national
security; or when determined necessary for the
management of air traffic in the vicinity of aerial
demonstrations or major sporting events. NAS users
or other interested parties should contact a FSS for
TFR information. Additionally, TFR information can
be found in automated briefings, NOTAM publica-
tions, and on the internet at http://www.faa.gov. The
FAA also distributes TFR information to aviation
user groups for further dissemination.

TENTATIVE CALCULATED LANDING TIME- A

projected time calculated for adapted vertex for each

arrival aircraft based upon runway configuration,
airport acceptance rate, airport arrival delay period,
and other metered arrival aircraft. This time is either
the VTA of the aircraft or the TCLT/ACLT of the
previous aircraft plus the AAI, whichever is later.
This time will be updated in response to an aircraft's
progress and its current relationship to other arrivals.

TERMINAL AREA- A general term used to describe
airspace in which approach control service or airport
traffic control service is provided.

TERMINAL AREA FACILITY- A facility provid-
ing air traffic control service for arriving and
departing IFR, VFR, Special VFR, and on occasion
en route aircraft.
(See APPROACH CONTROL FACILITY.)

(See TOWER.)

TERMINAL AUTOMATION SYSTEMS (TAS)-
TAS is used to identify the numerous automated
tracking systems including ARTS IIE, ARTS IIIA,
ARTS IIIE, STARS, and MEARTS.
TERMINAL DATA LINK SYSTEM (TDLS)- A
system that provides Digital Automatic Terminal
Information Service (D-ATIS) both on a specified

PCG T-2

Page 710 of the Aeronautical Information Manual (AIM.pdf)
AIM: Official Guide to Basic Flight Information and ATC Procedures

Index   709 -- Page 710 -- 711