2) In 3-9 seconds: a) A PWS FAIL message shows ON the First Officer’s display unit (DU). b) A WINDSHEAR SYS advisory EICAS message shows on the CDU.
EFFECTIVITY SIL ALL 34-43 TASK 801
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3) In 9-12 seconds:
a) GO AROUND, WINDSHEAR AHEAD, (pause) WINDSHEAR AHEAD, WINDSHEAR
AHEAD is heard on the flight desk aural warning speakers.
b) A red WINDSHEAR shows on the First Officer’s display unit (DU).
4) After 15 seconds:
a) Make sure the weather radar test display on the First Officer’s display unit (DU) has
a multi-colored displayed.
SIL 001-003
(l) Make sure these indications occur:
NOTE: All times are approximate.
1) In 0-3 seconds: a) A PWS FAIL message shows ON the First Officer’s display unit (DU). b) A WINDSHEAR SYS advisory EICAS message shows on the CDU.
2) In 3-9 seconds: a) An amber WINDSHEAR shows on the First Officer’s display unit (DU). b) The aural message MONITOR RADAR DISPLAY is heard on the flight desk warning
speakers. c) A WINDSHEAR SYS advisory EICAS message shows on the CDU. 3) In 9-12 seconds: a) GO AROUND, WINDSHEAR AHEAD, (pause) WINDSHEAR AHEAD, WINDSHEAR AHEAD is heard on the flight desk aural warning speakers. b) A red WINDSHEAR shows on the First Officer’s display unit (DU). 4) After 15 seconds: a) Make sure the weather radar test display on the First Officer’s display unit (DU) has a multi-colored displayed.
SIL ALL
(m)
Set the SOURCE switch on the instrument switching module to the AUTO position.
(n)
Make sure the test pattern stays on the Captain’s and First Officers display unit (DU).
(o)
Push the WXR switch on the Captain’s EFIS control panel to the OFF position.
NOTE: These steps make sure the correct operation of the WXR power switch on the First Officer’s EFIS control panel. 1) Make sure the weather radar data on the Captain’s DU is removed. 2) Make sure the test pattern stays on the First Officer’s DU.
(p)
Push the WXR switch on the Captain’s EFIS control panel to the ON position. 1) Make sure that WXR FAIL does not show on the Captain’s or First Officer’s DU. 2) If WXR FAIL shows on the Captain’s or First Officer’s DU, then refer to the applicable
Maintenance Message Index to find the fault isolation task.
SIL 014, 015, 020
(2) Do the BITE procedure for the Left (Right) weather radar receiver/transmitter.
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(a)
Make sure the air data inertial reference unit ( ADIRU ) is aligned to the NAV mode. To align it, do this task: Air Data Inertial Reference System -Alignment from the ISDU, AMM TASK 34-21-00-820-802 or Air Data Inertial Reference System -Alignment from the FMC CDU, AMM TASK 34-21-00-820-801.
(b)
Remove the safety tags and close these circuit breakers:
CAPT Electrical System Panel, P18-3
Row Col Number Name
C 7 C01678 WEATHER RADAR RT RIGHT
F/O Electrical System Panel, P6-1
Row Col Number Name
D 13 C00120 WEATHER RADAR RT
WARNING: DO NOT OPERATE THE WEATHER RADAR UNLESS ALL PERSONNEL ARE MORE THAN 50 FT (15 M) FROM THE RADAR. DO NOT OPERATE THE WEATHER RADAR IN A HANGAR. IF YOU DO NOT OBEY THESE PRECAUTIONS, INJURIES TO PERSONNEL CAN OCCUR.
WARNING: IF THERE IS FUEL LEAKAGE OR AN OPEN FUEL CELL LESS THAN 50 FT (15 M) FROM THE RADAR, DO NOT OPERATE THE WEATHER RADAR. IF THERE IS FUEL IN THE 50-FOOT RADIUS AROUND THE RADAR, IT CAN CAUSE A FIRE AND EXPLOSION. THESE CAN CAUSE INJURIES TO PERSONNEL, AND DAMAGE TO EQUIPMENT. THESE CAN KILL PERSONNEL.
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