Function
 AMM 34-48-34-000-001 Removal of the GPWC (1WZ)
 AMM 34-48-34-400-001 Installation of the GPWC (1WZ)
 ASM 34-48/01

 3. Fault Confirmation
__________________
 A. Test
 (1) Do operational test of Enhanced GPWS ground self-test function (Ref. AMM TASK 34-48-00-710-001).
 4. Fault Isolation
_______________
 A. If there is no audio signal at the CAPT loud speaker only:
 - replace the LOUD SPEAKER-CAPT (7WW) (Ref. AMM TASK 31-53-21-000-001) and (Ref. AMM TASK 31-53-21-400-001).
 (1) If the fault continues:
 - do a check and repair the wiring of the ALARM 2 INPUT bus from the CAPT loud speaker (7WW) to the first terminal block (Ref. ASM 34-48/01).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞34-48-00∞∞∞∞∞∞∞∞∞∞Page 220
 Aug 01/02R CES

 B. If there is no audio signal at the F/O loud speaker only:
 - replace the LOUD SPEAKER-F/O (8WW) (Ref. AMM TASK 31-53-21-000-001) and (Ref. AMM TASK 31-53-21-400-001).
 (1) If the fault continues:
 - do a check and repair the wiring of the ALARM 2 INPUT bus from the F/O loud speaker (8WW) to the first terminal block (Ref. ASM 34-48/01).
 C. If there is no audio signal at the two loud speakers:
 - replace the GPWC (1WZ) (Ref. AMM TASK 34-48-34-000-001) and (Ref. AMM TASK 34-48-34-400-001).
 (1) If the fault continues:
 - do a check and repair the wiring of the AUDIO OUTPUT bus from the GPWC (1WZ) to the first terminal block (Ref. ASM 34-48/01).
 D. Do the test given in Para. 3.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞34-48-00∞∞∞∞∞∞∞∞∞∞Page 221
 Aug 01/02R
 CES  Loss of the Visual Warning for Modes 1 to 4

 1. Possible Causes
_______________
 - GPWC (1WZ)

 - BOARD-ANN LT TEST & INTFC (4LP)

 - wiring of the F/O GPWS/G/S pushbutton switch (4WZ)

 - wiring of the annunciator light test and interface board (4LP)

 - P/BSW - GPWS/G/S (5WZ)

 - wiring of the CAPT GPWS/G/S pushbutton switch (5WZ)

 - P/BSW - GPWS/G/S (4WZ)

 - C/B - EIS/GPWS/28VDC (2WZ)

 - wiring of the F/O PULL UP/GPWS pushbutton switch (4WZ)

 - P/BSW - PULL UP/GPWS (5WZ)

 - wiring of the CAPT PULL UP/GPWS pushbutton switch (5WZ)

 - P/BSW - PULL UP/GPWS (4WZ)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 33-10-00-000-002 Removal of the Bulbs and the Body of a Pushbutton Switch in the Cockpit AMM 33-10-00-400-002 Installation of the Bulbs and the Body of a Pushbutton Switch in the Cockpit AMM 33-14-33-000-001 Removal of the Annunciator-Light Test and Interface-Board (1LP, 2LP, 3LP, 4LP, 5LP, 6LP, 7LP, R 8LP, 9LP, 10LP, 11LP, 12LP, 18LP, 19LP, 20LP) AMM 33-14-33-400-001 Installation of the Annunciator-Light Test and Interface-Board (1LP, 2LP, 3LP, 4LP, 5LP, 6LP, 7LP, R 8LP, 9LP, 10LP, 11LP, 12LP, 18LP, 19LP, 20LP) AMM 34-48-00-710-001 Operational Test of Enhanced GPWS Ground Self-test
 Function
 AMM 34-48-34-000-001 Removal of the GPWC (1WZ)
 AMM 34-48-34-400-001 Installation of the GPWC (1WZ)
 ASM 34-48/01

 3. Fault Confirmation
__________________
R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-214,
 A. Test
 (1) Do the operational test of Enhanced GPWS ground self-test function (Ref. AMM TASK 34-48-00-710-001).

 (2) Make sure that the GPWS legend of the CAPT and F/O GPWS/G/S pushbutton switches comes on.

R **ON A/C 106-149, 215-299, 301-399, 401-499,
 A. Test
 (1) Do the operational test of Enhanced GPWS ground self-test function (Ref. AMM TASK 34-48-00-710-001).

 (2) Make sure that the PULL UP legend of the CAPT and F/O PULL UP/GPWS pushbutton switches comes on.

 **ON A/C ALL
 4. Fault Isolation
_______________
 A. Table of the circuit breakers used in this procedure:
 -------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION
　
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