TCAS RESOLUTION ADVISORIES
RA CATEGORY CORRECTIVE PREVENTIVE
CLIMB “CLIMB, CLIMB, CLIMB” “MONITOR VERTICAL SPEED”* “MONITOR VERTICAL SPEED”
DESCENT “DESCEND, DESCEND, DESCEND” “MONITOR VERTICAL SPEED”* “MONITOR VERTICAL SPEED”
CROSSOVER CLIMB “CLIMB, CROSSING CLIMB” “CLIMB, CROSSING CLIMB” “MONITOR VERTICAL SPEED”* “MONITOR VERTICAL SPEED”
CROSSOVER DESCENT “DESCEND, CROSSING DESCEND” “DESCEND, CROSSING DESCEND” “MONITOR VERTICAL SPEED”* “MONITOR VERTICAL SPEED”
INCREASE CLIMB RATE “INCREASE CLIMB” “INCREASE CLIMB” (N/A)
INCREASE DESCENT RATE “INCREASE DESCEND” “INCREASE DESCEND” (N/A)
CHANGE FROM CLIMB TO DESCENT “DESCEND, DESCEND NOW” “DESCEND, DESCEND NOW” (N/A)
CHANGE FROM DESCENT TO CLIMB “CLIMB, CLIMB NOW” “CLIMB, CLIMB NOW” (N/A)
VERTICAL SPEED RESTRICTED (CLIMBING) “REDUCE CLIMB, REDUCE CLIMB” “MONITOR VERTICAL SPEED” “MONITOR VERTICAL SPEED”
VERTICAL SPEED RESTRICTED (DESCENDING) “REDUCE DESCENT, REDUCE DESCENT” “MONITOR VERTICAL SPEED” “MONITOR VERTICAL SPEED”
* “Monitor Vertical Speed” is spoken once if softening from a previous corrective advisory.
TRANSPONDER / TCAS CONTROL PANEL
MD-80
Continental
Rev. 12/01/00 #29 Flight Manual
TCAS Mode Message Format
The TCAS mode message format is shown below.
TCAS STBY (Blue) TCAS system in standby
TEST (Blue) TCAS system in TEST
TA/RA (Blue) TA/RA Mode
TA/RA AUTO (Blue) TA/RA Pop-Up Mode
TA ONLY (Blue) TA Only Mode
TA AUTO (Blue) TA Only Pop-Up Mode
TD FAIL (Yellow) Indicator Failure
FLXXX (Cyan) ABSOLUTE ALTITUDE where XXX is own
altitude. Field is bland for relative altitude.
TCAS RA/VSI
Continental
Rev. 12/01/00 #29 Flight Manual
INTENTIONALLY LEFT BLANK
COMMUNICATIONS
VHF Communications Systems
The VHF communication systems are three separate, identical systems designated VHF-1, VHF-2, and VHF-3 (some aircraft) which can be operated separately or simultaneously. The systems provide communication between the airplane and ground and/or another aircraft. The transmitting and receiving frequency selection is controlled from the VHF COMM control panels. Each panel has two frequency selectors and a transfer switch to select either frequency selected.
The audio control panels control volume level of receiver audio. Selection of the desired VHF communication system on the audio control panel is made by pushing the applicable microphone selector button and placing the corresponding volume control lever toward increased volume. The microphone and the headset of the flight interphone system will then be connected to the desired VHF communication system transceiver.
The microphone switch on the outboard horn of either control wheel, or the push-to-talk (PTT) switch on either hand microphone, can be used to place the selected transmitter in operation.
Selective Calling System
The selective calling (SELCAL) system operates in conjunction with the VHF communication systems, and provides visual and aural indication when the airplane is being called. The system enables ground facilities to call individual airplanes selectively. The airplane system includes a decoder with dual channels (SELCAL-1 and SELCAL–2) and a control panel containing the SELCAL indicating lights (SELCAL-1 and SELCAL–2 lights). VHF-1 receiver is monitored by the SELCAL-1 decoder circuit, and VHF-2 (and VHF-3 if installed) is monitored by the SELCAL-2 decoder circuit. Each decoder circuit is tuned to a preselected tone signal. The tone signal will be received by all aircraft tuned to the assigned frequency of the tone signal, however, only the SELCAL decoder of the aircraft being called will respond to the signal. When the tone signal is detected by the decoder, the applicable SELCAL light comes on and the central aural warning system (CAWS) provides a chime sound to indicate that the ground station is calling the aircraft. When the call is acknowledged, the system is reset by pushing the applicable SELCAL light on the control panel.
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