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"COMMERCIAL HYDRAULICS" 32-30-00Page 15
(CA) JUN 02
PAGE INTENTIONALLY LEFT BLANK
ACAC
Validity : Electrohydraulic generator
"COMMERCIAL HYDRAULICS" 32-30-00Page 16
(CA) JUN 02
EXTENSION AND RETRACTION
TROUBLE-SHOOTING
1. TROUBLE-SHOOTING PROCEDURE
Figure 101 : Landing gear does not retract.
Figure 102: Landing gear does not extend.
Figure 103 : One of the main landing gears does not extend or does not lock in low position. Figure 104: One of the landing gears does not retract or does not lock in high position. Figure 105 : Landing gear does not remain in high position
AAAA
Validity : S / N 1 - 9999 32-30 Page 101
0 0 (BA) JUN 01
LANDING GEAR DOES NOT
RETRACT
A. The electro-hydraulic generator is not power supplied
IS PRESSURE SWITCH IN NO
CLOSED POSITION ?
REPLACE P ESSUR
SWITCH
YES
V
DOES "UP" LANDING GEAR
SWITCH OPERATE
CORRECTLY ?
YES
•
CHECK : - DIODES WITH AN OHMMETER,
- CONNECTIONS OF DIODES,
- ELECTRICAL BONDING OF DIODES TO SWITCH SUPPORT,
- ELECTRICAL BONDING OF SWITCH SUPPORT TO FRAME C3,
- ELECTRICAL WIRING.
REPLACE FAULTY DIODE(S).
CHECK
ELECTRO-HYDRAULIC
GENERATOR OPERATION.
REPLACE FAULTY
COMPONENTS
•
DOES "UP" LANDING GEAR
SWITCH OPERATE
CORRECTLY ?
YES
REPLACE "UP" LANDING
GEAR SWITCH
END OF TESTS
B. The electro-hydraulic generator is power supplied
IS HYDRAULIC FLUID
LEVEL IN RESERVOIR
CORRECT ?
IS THERE A HYDRAULIC
LEAKAGE IN LANDING
GEAR RETRACTION
SYSTEM ?
REPLACE FAULTY
ELEMENTS
CHECK
ELECTRO-HYDRAULIC
GENERATOR OPERATION.
REPLACE FAULTY
COMPONENTS
Landing gear does not retract
Figure 101
LANDING GEAR DOES NOT PREREQUISITES
EXTEND "LDG GEAR" "PULL OFF" TYPE
CIRCUIT-BREAKER CLOSED
YES
Landing gear does not extend
Figure 102
ONE OF THE MAIN LANDING
GEARS DOES NOT EXTEND
OR DOES NOT LOCK IN LOW
POSITION PREREQUISITES
"LDG GEAR" "PULL OFF" TYPE
CIRCUIT-BREAKER CLOSED
IS ELECTROHYDRAULIC
GENERATOR STOPPED ?
CHECK GENERATOR
ELECTRIC MOTOR
YES
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