(b) If the voltmeter readout is not correct:

 - replace the RELAY-L/G POSITION, SYS1 (11GB).
 1_ If the fault continues:
 - do a check of the wiring of the relay (11GB):
 . from pin A/A2 to the circuit breaker (16FN)
 . from pin A/A3 to the standby altimeter (3FN)
 (Ref. ASM 34-21/01).

 a If there is no continuity:
_ - repair the above wiring.
 b If there is continuity:
_ - replace the C/B-NAV/STBY/ALTM (16FN).
 (2) If the voltmeter readout is not equal to O V:
 - replace the RELAY-L/G POSITION, SYS1 (11GB).
 (a) If the fault continues:
 - replace the LGCIU-1 (5GA1) (Ref. AMM TASK 32-31-71-000-001) and (Ref. AMM TASK 32-31-71-400-001).
 1 If the fault continues:
_
 - do a check and repair the wiring from the LGCIU1 (5GA1) to the SYS1 L/G position relay (11GB): from pin AB/1B to pin A/X2 (Ref. ASM 32-62/01).

 TASK 34-21-00-810-802
 Standby Airspeed Information not Accurate

 1. Possible Causes
_______________
 - IND-STANDBY AIRSPEED (9FN)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R  AMM 34-10-00-170-003 Draining and Flushing of Standby Pneumatic Circuits AMM 34-21-00-720-001 Functional Test of the Standby Airspeed Indicator AMM 34-21-26-000-001 Removal of the Standby Airspeed Indicator (9FN) AMM 34-21-26-400-001 Installation of the Standby Airspeed Indicator (9FN)
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the functional test of the standby airspeed indicator (Ref. AMM TASK 34-21-00-720-001).
 4. Fault Isolation
_______________
 A. If the standby airspeed indicator shows out of tolerance values:
 - replace the IND-STANDBY AIRSPEED (9FN) (Ref. AMM TASK 34-21-26-000-001) and (Ref. AMM TASK 34-21-26-400-001).
 (1) If the fault continues:
 - drain and flush the standby static and the standby total pressure lines (Ref. AMM TASK 34-10-00-170-003).
 B. Do the test given in Para. 3.

 TASK 34-21-00-810-803
 Standby Altitude Information no Accurate

 1. Possible Causes
_______________
 - ALTM-STANDBY (3FN)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R  AMM 34-10-00-170-003 Draining and Flushing of Standby Pneumatic Circuits AMM 34-21-00-720-002 Functional Test of the Standby Altimeter AMM 34-21-22-000-001 Removal of the Standby Altimeter (3FN) AMM 34-21-22-400-001 Installation of the Standby Altimeter (3FN)
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the functional test of the standby altimeter (Ref. AMM TASK 34-21-00-720-002).
 4. Fault Isolation
_______________
 A. If the standby altimeter shows out of tolerance values:
 - replace the ALTM-STANDBY (3FN) (Ref. AMM TASK 34-21-22-000-001) and (Ref. AMM TASK 34-21-22-400-001).
 (1) If the fault continues:
 - drain and flush the standby static pressure line (Ref. AMM TASK 34-10-00-170-003).
 B. Do the test given in Para. 3.

R **ON A/C 001-049, 051-099, 101-105,
 TASK 34-21-00-810-804
 Metric Altitude Information not Accurate

 1. Possible Causes
_______________
 - ALTIMETER-METRIC (15FN)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 34-10-00-170-003 Draining and Flushing of Standby Pneumatic Circuits
 AMM 34-21-25-000-001 Removal of the Metric Altimeter (15FN)
 AMM 34-21-25-400-001 Installation of the Metric Altimeter (15FN)

 3. Fault Confirmation

__________________
 A. Test
 (1) Not applicable, the fault is evident.
 4. Fault Isolation
_______________
 A. If the metric altimeter shows out of tolerance values:
 - replace the ALTIMETER-METRIC (15FN) (Ref. AMM TASK 34-21-25-000-001) and (Ref. AMM TASK 34-21-25-400-001).
 (1) If the fault continues:
 - drain and flush the standby static pressure line (Ref. AMM TASK 34-10-00-170-003).
　
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