Q-CODE 4th & 5th Letters for
Communications and Radar



AIR/GROUND FACILITY (CA)
AHHOURS OF SERVICE ARE
ASUNSERVICEABLE
AWCOMPLETELY WITHDRAWN
CFFREQUENCY CHANGED TO
CIIDENTIFICATION OR RADIO CALL SIGN CHANGED TO
CRTEMPORARILY REPLACED BY
CSINSTALLED
LFINTERFERENCE FROM
LSSUBJECT TO INTERRUPTION
LTLIMITED TO
TTHAZARD
XX
Top
Back to 2nd & 3rd Top


AUTOMATIC DEPENDENT SURVEILLANCE - BROADCAST (CB)
AHHOURS OF SERVICE ARE
ASUNSERVICEABLE
AWCOMPLETELY WITHDRAWN
CFFREQUENCY CHANGED TO
CIIDENTIFICATION OR RADIO CALL SIGN CHANGED TO
CRTEMPORARILY REPLACED BY
CSINSTALLED
LFINTERFERENCE FROM
LSSUBJECT TO INTERRUPTION
LTLIMITED TO
TTHAZARD
XX
Top
Back to 2nd & 3rd Top


AUTOMATIC DEPENDENT SURVEILLANCE - CONTRACT (CC)
AHHOURS OF SERVICE ARE
AOOPERATIONAL
ASUNSERVICEABLE
AWCOMPLETELY WITHDRAWN
CFFREQUENCY CHANGED TO
CIIDENTIFICATION OR RADIO CALL SIGN CHANGED TO
CRTEMPORARILY REPLACED BY
CSINSTALLED
LFINTERFERENCE FROM
LSSUBJECT TO INTERRUPTION
LTLIMITED TO
TTHAZARD
XX
Top
Back to 2nd & 3rd Top


CONTROLLER-PILOT DATA LINK COMMUNICATIONS (CD)
AHHOURS OF SERVICE ARE
ASUNSERVICEABLE
AWCOMPLETELY WITHDRAWN
CFFREQUENCY CHANGED TO
CIIDENTIFICATION OR RADIO CALL SIGN CHANGED TO
CRTEMPORARILY REPLACED BY
CSINSTALLED
LFINTERFERENCE FROM
LSSUBJECT TO INTERRUPTION
LTLIMITED TO
TTHAZARD
XX
Top
Back to 2nd & 3rd Top


ENROUTE SURVELLENCE RADAR (CE)
AHHOURS OF SERVICE ARE
ASUNSERVICEABLE
AWCOMPLETELY WITHDRAWN
CFFREQUENCY CHANGED TO
CIIDENTIFICATION OR RADIO CALL SIGN CHANGED TO
CRTEMPORARILY REPLACED BY
CSINSTALLED
CTON TEST, DO NOT USE
LFINTERFERENCE FROM
LSSUBJECT TO INTERRUPTION
LTLIMITED TO
XX
Top
Back to 2nd & 3rd Top


GROUND CONTROLLED APPROACH SYSTEM (GCA) (CG)
AHHOURS OF SERVICE ARE
APPRIOR PERMISSION REQUIRED
ARAVAILABLE, PRIOR PERMISSION REQUIRED
ASUNSERVICEABLE
AWCOMPLETELY WITHDRAWN
CFFREQUENCY CHANGED TO
CIIDENTIFICATION OR RADIO CALL SIGN CHANGED TO
CSINSTALLED
CTON TEST, DO NOT USE
LTLIMITED TO
TTHAZARD
XX
Top
Back to 2nd & 3rd Top


SELECTIVE CALLING SYSTEM (CL)
ASUNSERVICEABLE
AWCOMPLETELY WITHDRAWN
CFFREQUENCY CHANGED TO
CIIDENTIFICATION OR RADIO CALL SIGN CHANGED TO
CSINSTALLED
CTON TEST, DO NOT USE
LTLIMITED TO
XX
Top
Back to 2nd & 3rd Top


SURFACE MOVEMENT RADAR (CM)
ASUNSERVICEABLE
AWCOMPLETELY WITHDRAWN
CSINSTALLED
CTON TEST, DO NOT USE
LTLIMITED TO
TTHAZARD
XX
Top
Back to 2nd & 3rd Top


PAR (CP)
ACWITHDRAWN FOR MAINTENANCE
AHHOURS OF SERVICE ARE
APPRIOR PERMISSION REQUIRED
ARAVAILABLE, PRIOR PERMISSION REQUIRED
ASUNSERVICEABLE
AUNOT AVAILABLE
AWCOMPLETELY WITHDRAWN
CFFREQUENCY CHANGED TO
CIIDENTIFICATION OR RADIO CALL SIGN CHANGED TO
CSINSTALLED
CTON TEST, DO NOT USE
LTLIMITED TO
TTHAZARD
XX
Top
Back to 2nd & 3rd Top


SURVEILLANCE RADAR ELEMENT OF PAR SYSTEM (CR)
AHHOURS OF SERVICE ARE
APPRIOR PERMISSION REQUIRED
ARAVAILABLE, PRIOR PERMISSION REQUIRED
ASUNSERVICEABLE
AWCOMPLETELY WITHDRAWN
CFFREQUENCY CHANGED TO
CIIDENTIFICATION OR RADIO CALL SIGN CHANGED TO
CSINSTALLED
CTON TEST, DO NOT USE
LSSUBJECT TO INTERRUPTION
LTLIMITED TO
TTHAZARD
XX
Top
Back to 2nd & 3rd Top


SECONDARY SURVEILLANCE RADAR (CS)
AHHOURS OF SERVICE ARE
ASUNSERVICEABLE
AWCOMPLETELY WITHDRAWN
CFFREQUENCY CHANGED TO
CIIDENTIFICATION OR RADIO CALL SIGN CHANGED TO
CSINSTALLED
CTON TEST, DO NOT USE
LSSUBJECT TO INTERRUPTION
LTLIMITED TO
TTHAZARD
XX
Top
Back to 2nd & 3rd Top


TERMINAL AREA SURVEILLANCE RADAR (CT)
AHHOURS OF SERVICE ARE
ASUNSERVICEABLE
AWCOMPLETELY WITHDRAWN
CFFREQUENCY CHANGED TO
CIIDENTIFICATION OR RADIO CALL SIGN CHANGED TO
CSINSTALLED
CTON TEST, DO NOT USE
LSSUBJECT TO INTERRUPTION
LTLIMITED TO
TTHAZARD
XX
Top
Back to 2nd & 3rd Top


ASR (GJ)
ACWITHDRAWN FOR MAINTENANCE
AFFLIGHT CHECKED AND FOUND RELIABLE
AKRESUMED NORMAL OPERATIONS
AMMILITARY OPERATIONS ONLY
AUNOT AVAILABLE
AWCOMPLETELY WITHDRAWN
CSINSTALLED
CTON TEST, DO NOT USE
GHUNUSABLE
GVNOT AUTHORIZED
LTLIMITED TO
XX
Top
Back to 2nd & 3rd Top


PRECISION APPROACH LANDING SYSTEM (GK)
ACWITHDRAWN FOR MAINTENANCE
ADAVAILABLE FOR DAYLIGHT OPERATIONS
AFFLIGHT CHECKED AND FOUND RELIABLE
AGOPERATING BUT GROUND CHECKED ONLY, AWAITING FLIGHT CHECK
AKRESUMED NORMAL OPERATIONS
AMMILITARY OPERATIONS ONLY
AUNOT AVAILABLE
AWCOMPLETELY WITHDRAWN
CFFREQUENCY CHANGED TO
CHCHANGED
CSINSTALLED
CTON TEST, DO NOT USE
GANOT COINCIDENTAL WITH ILS/PAR
GHUNUSABLE
GVNOT AUTHORIZED
LTLIMITED TO
XX
Top
Back to 2nd & 3rd Top