User's Manual Part 1

CAS / Part No. 9000000

SYSTEM DESCRIPTION AND INSTALLATION MANUAL

34-43-20

15 Feb 2003

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1--67

“DESCEND, DESCEND NOW!—DESCEND, DESCEND NOW!”: (Received

after a “CLIMB” resolution advisory) Indicates a reversal in sense is required

to achieve safe vertical separation from a maneuvering intruder.

(4) Operating Procedures

Basic TCAS operating procedures on the ground include pre--flight test, TCAS

activation before takeoff, and TCAS deactivation after landing. In--flight procedures

are contained in the pilot’s manual.

(a) Pre--Flight Test

The VSI/TRA self -- test feature provides a convenient method to test the TCAS

system befo re t akeoff.

NOTE: Self --test can be initiated at any time, on the ground or in flight (if not

disabled in air by grounding pin RBP-- 8E), by momentarily pushing

TCAS TEST. If TAs and RAs occur while self--test is activated in flight,

the test aborts, and the advisories are processed and displayed.

To perform self-- test, push the TCAS TEST button on the control panel and

monitor the sequence that follows:

• Aural annunciation TCAS TEST is heard on audio system.

• Test pattern with fixed traffic and advisory symbols appears on the display for

eight seconds.

• Make sure the test pattern is as shown in Figure 1--18. The test pattern

includes:

-- An RA symbol at 3 o’clock, 2 nm, 200 ft above, in level flight

-- A TA symbol at 9 o ’clock, 2 nm, 200 ft below, climbing

-- A proximate traffic symbol at 3.6 nm, 33 degrees right of the aircraft

heading (approximately 1 o’clock), 1000 ft below, descending

-- A non--threat intruder (other traffic symbol) at 3.6 nm, 33 degrees left of the

aircraft heading (approximately 11 o’clock), 1000 ft above, in level flight

-- Red and green resolution advisory VSI overlay indicating a don’t descend,

don’t climb > 2000 ft/min advisory

-- TCAS TEST or RA OFF annunciation, depending on the capabilities of the

display.

-- After 8 seconds, TCAS TEST PASS is announced, and the test pattern is

replaced with the normal VSI display.

-- If self--test fails, TCAS TEST FAIL is announced, and TCAS FAIL appears

on the display. To obtain failure data, perform the extended test mode

procedure in the next section.

(b) TCAS Mode Activation

Prior to takeoff, activate TCAS as follows: