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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400 MAINTENANCE MANUAL 
MAGENTA 
RED 
MESSAGE MODE ANTENNA TILT MESSAGE TEST PASS MESSAGE HALF RANGE MESSAGE  TEST WXR TEST +15  20  YELLOW GREEN  FAIL TEST FAIL MESSAGES  FAIL RT ANT CON ATT WEAK WXR 
ND TEST PASS DISPLAY  ND TEST FAIL DISPLAY  1 

WX TEST PASS/  DEFECTIVE  WXR TEST 
TEST FAIL  LRU(S)  CONDITION  PATTERN 
(YELLOW)  (CYAN) 
WXR TEST  BLANK  TEST PASSED  ON 
WXR FAIL  T/R  RECEIVER/TRANSMITTER FAULT  OFF/ON 
WXR FAIL  ANT  ANTENNA FAULT  OFF 
WXR FAIL  CTL  CONTROL PANEL FAULT  OFF 
WXR FAIL  ATT  ATTITUDE INPUT FAULT  ON 
WXR FAIL  WEAK  CALIBRATION FAULT  ON 
ND TEST PASS/TEST FAIL MESSAGES 

1 DISPLAY SHOWS TEST PATTERN REMOVED FOR CERTAIN R/T FAULTS. SOME R/T FAULTS WILL NOT REMOVE TEST PATTERN
Weather Radar Test Displays and PWS Test Sequence Figure 501 (Sheet 1)
K24571
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
VISUAL AND AURAL TEST MESSAGES  TEST TIMING 0-2 SECONDS 2-12 SECONDS 
ND  (AMBER) WINDSHEAR  OFF  OFF 
ND & PFD  WINDSHEAR (RED)  OFF  ON 
LIGHT MASTER WARNING  OFF  ON 
UPPER EICAS  WINDSHEAR SYS (ADVISORY)  ON  OFF 
LOWER EICAS  WINDSHEAR PRED (STATUS)  ON  OFF 
AURAL  DISPLAY MONITOR RADAR  WINDSHEAR AHEAD, WINDSHEAR AHEAD 
DISPLAY  TEST PATTERN  TEST PATTERN 

Weather Radar Test Displays and PWS Test Sequence
Figure 501 (Sheet 2)

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 ú 09 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.  Page 509Feb 18/00 

H81001
A
747-400 MAINTENANCE MANUAL
 TASK 34-43-00-745-170
 3.  Ground Test - Weather Radar System__________________________________
 A. General
 (1)  
The ground test does an analysis of the self-test results from the R/T monitor circuits. A PASS or FAIL message shows on the CDU.

 (2)  
To perform this ground test the weather radar must be in a radiate mode. See the Prepare for the Test steps below for the radiate restrictions.

 (3)  
If it is necessary to test the weather radar system in a non-radiate mode, the self test part of the weather radar operational test must be performed.

 B. References
 (1)  
24-22-00/201, Manual Control

 (2)  
34-21-00/201, Inertial Reference System

 C. Access
 (1)  Location Zones
 221 Control Cabin, Left
 222 Control Cabin, Right

 D. Prepare for the Test
 S 865-119
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 865-181

 (2)  
Close these circuit breakers:

 (a)  P7 Overhead Circuit Breaker Panel
 1) 7C7 WXR L RT
 2) 7C19 WXR R RT

 S 865-172
 (3)  
Set the WXR switch/indicator on the captain's and first officer's EFIS control panels to the on position.

 S 865-165

 (4)  
Set the SYS switch on the WXR control panel to one of these positions:

 (a)  
　
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