.  
TCAS Range Selector............................................................ 5 MILES

.  
Transponder Code Selector ........................................ AS REQUIRED

.  
Relative Altitude Selector.............................................. AS DESIRED

.  
Transponder Selector............................. ATC 1 (CAPT FLYING) OR ATC 2 (F/O FLYING)

WARNING:  Failure to return the transponder to STBY after landing or selecting any mode except STBY prior to leaving the ramp area allows the radar to operate in the windshear mode creating a radiation hazard to personnel on the ground. The RDR-4B radiation hazard area extends 13.4 feet from the radar antenna in a 120 degree arc left and right of the aircraft centerline.  This hazard exists even if the radar mode is selected OFF or TEST.
OTHER FLIGHTS
No test is required.
ACARS ................................................................................... INITIALIZED

FIRST FLIGHT OF DAY
Press LINK TEST key to test system and receive clock update.  Verify the correct time is set in ACARS.  Initialize ACARS for the planned flight. Refer to ACARS Procedures, this section.
OTHER FLIGHTS
Initialize ACARS for the planned flight.
Stabilizer (FFOD) ....................................................................... CHECKED

FIRST FLIGHT OF DAY
While observing the stabilizer indicator, hold Captain’s wheel left trim
switch to nose-up and then down momentarily.
Caution: Do not hold single switch position longer than 3 seconds.
The stabilizer indicator should not move and the aural signal should not sound.  Repeat this check, using Captain’s right trim wheel switch.  The stabilizer should not move and aural signal not sound.  (This check may be accomplished from the First Officer’s wheel trim switches. Only one check is necessary).
Operate both Captain’s wheel switches in the nose-up and then nose-down directions and note corresponding direction of stabilizer indicator movement and audible tone.
Operate both First Officer’s wheel switches and check stabilizer indicator movement and audible tone.  (Moving either set of switches opposite to a set of operating switches will stop the stabilizer movement).  This is not a required test.  If test is used, do not exceed 3-second limit.
Operate both longitudinal trim handles in same direction and check for corresponding indicator movement and audible tone.  Release handles to neutral.
Operate both ALT LONG TRIM switches and check for direction of travel. Observe that the alternate trim stops moving when the alternate trim switches are released.
While observing the horizontal trim indicator, momentarily operate each ALT LONG TRIM switch individually to NOSE UP and NOSE DN. Observe that the stabilizer does not move, and that the aural warning does not sound when only one switch is moved in either direction.  If the stabilizer moves with just one switch activated, there is a malfunction in the alternate trim switch and maintenance action is required before flight.
Note:  To obtain maximum service life, do not maintain switch positions longer than necessary to check response.  If there is no response, release switches and determine cause.  Should any switch or control hesitate or stick in returning to neutral, it should be corrected before flight.  Any time the longitudinal trim handles, dual longitudinal trim (wheel) switches, or alternate longitudinal trim (secondary) controls are used, they should be operated to their fully deflected position to assure both motor and brake circuits are actuated.
OTHER FLIGHTS
No test is required.
Spoilers (FLOW).................................................................... RETRACTED

FIRST FLIGHT OF DAY
Verify spoiler handle is retracted.  Normally, one-half of the red arming
band should be visible when the handle is retracted.
OTHER FLIGHTS
Same as FIRST FLIGHT OF DAY.

Rudder Control (FFOD) ................................................................. POWER

FIRST FLIGHT OF DAY Verify rudder hydraulic control lever is in POWER position.  The RUDDER CONTROL MANUAL annunciator light should be off with normal hydraulic pressure on the right system.
OTHER FLIGHTS
Same as FIRST FLIGHT OF DAY.

Takeoff Warning, Throttles.....................................CHECKED, CLOSED

FIRST FLIGHT OF DAY
Throttles should be advanced to check freedom of movement and the
takeoff warning horn, then returned to the closed position.
　
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