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return to “normal sensitivity” position as soon as
possible thereafter.
PHRASEOLOGYSQUAWK
STANDBY,
or
SQUAWK LOW/NORMAL.
REFERENCEFAAO
JO 7110.65, Para 5-3-3, Beacon Identification Methods.
5-2-13. CODE MONITOR
Continuously monitor the Mode 3/A radar beacon
codes assigned for use by aircraft operating within
your area of responsibility when nonautomated
beacon decoding equipment (e.g., 10-channel
decoder) is used to display the target symbol.
REFERENCEFAAO
JO 7110.65, Para 5-2-6, Function Code Assignments.
NOTEIn
addition to alphanumeric and control symbology
processing enhancements, the MEARTS, STARS, and the
TPX-42 systems are equipped with automatic beacon
decoders. Therefore, in facilities where the automatic
beacon decoders are providing the control slash video,
there is no requirement to have the nonautomated decoding
equipment operating simultaneously.
REFERENCEFAAO
JO 7210.3, Para3-7-4, Monitoring of Mode 3/A Radar Beacon
Codes.
a. This includes the appropriate IFR code actually
assigned and, additionally, Code 1200, Code 1255,
and Code 1277 unless your area of responsibility
includes only Class A airspace. During periods when
ring‐around or excessive VFR target presentations
derogate the separation of IFR traffic, the monitoring
of VFR Code 1200, Code 1255, and Code 1277 may
be temporarily discontinued.
b. Positions of operation which contain a
restricted or warning area or VR route within or
immediately adjacent to their area of jurisdiction
shall monitor Code 4000 and any other code used in
lieu of 4000 within the warning/restricted area or
VRroute. If by local coordination with the
restricted/warning area or VR route user a code other
than 4000 is to be exclusively used, then this code
shall be monitored.
c. If a normally assigned beacon code disappears,
check for a response on the following codes in the
order listed and take appropriate action:
NOTEWhen
Codes 7500 and/or 7600 have been preselected, it
will be necessary for the ID-SEL-OFF switches for these
codes to be left in the off position so that beacon target for
an aircraft changing to one of these codes will disappear,
thereby alerting the controller to make the check. This
check will not be required if automatic alerting capability
exists.
1. Code 7500 (hijack code).
REFERENCEFAAO
JO 7110.65, Para 10-2-6, Hijacked Aircraft.
JO 7110.65S 2/14/08
5-2-6 Beacon Systems
2. Code 7600 (loss of radio communications
code).
5-2-14. FAILURE TO DISPLAY ASSIGNED
BEACON CODE OR INOPERATIVE/
MALFUNCTIONING TRANSPONDER
a. Inform an aircraft with an operable transponder
that the assigned beacon code is not being displayed.
PHRASEOLOGY-
(Identification) RESET TRANSPONDER, SQUAWK
(appropriate code).
b. Inform an aircraft when its transponder appears
to be inoperative or malfunctioning.
PHRASEOLOGY-
(Identification) YOUR TRANSPONDER APPEARS
INOPERATIVE/MALFUNCTIONING, RESET, SQUAWK
(appropriate code).
c. Ensure that the subsequent control position in
the facility or the next facility, as applicable, is
notified when an aircraft transponder is malfunctioning/
inoperative.
REFERENCEFAAO
JO 7110.65, Para 5-3-3, Beacon Identification Methods.
5-2-15. INOPERATIVE OR
MALFUNCTIONING INTERROGATOR
Inform aircraft concerned when the ground interrogator
appears to be inoperative or malfunctioning.
PHRASEOLOGY-
(Name of facility or control function) BEACON
INTERROGATOR INOPERATIVE/MALFUNCTIONING.
REFERENCEFAAO
JO 7110.65, Para 5-1-3, Radar Use.
FAAO JO 7110.65, Para 5-3-3, Beacon Identification Methods.
5-2-16. FAILED TRANSPONDER IN CLASS
A AIRSPACE
Disapprove a request or withdraw previously issued
approval to operate in Class A airspace with a failed
transponder solely on the basis of traffic conditions or
other operational factors.
REFERENCEFAAO
JO 7110.65, Para 5-1-3, Radar Use.
FAAO JO 7110.65, Para 5-3-3, Beacon Identification Methods.
5-2-17. VALIDATION OF MODE C
READOUT
Ensure that Mode C altitude readouts are valid after
accepting an interfacility handoff, initial track start,
track start from coast/suspend tabular list, missing, or
unreasonable Mode C readouts. For TPX-42 and
equivalent systems ensure that altitude readout is
valid immediately after identification.
(TCDD-/BANS-equipped tower cabs are not
required to validate ModeC readouts after receiving
interfacility handoffs from TRACONs according to
　
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