- SCV LVDT SECONDARY SHOWS OPEN CIRCUIT
- SCV TORQUE MOTOR SHOWS OPEN CIRCUIT
- SCV TORQUE MOTOR SHOWS SHORT CIRCUIT
- SCV LVDT EXCITATION CIRCUIT FAILURE
- damage/contamination of electrical connector P18
- SURGE CONTROL VALVE (P18)
- aircraft wiring
- ECB (59KD)
- SURGE CONTROL VALVE (8058KM)
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
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REFERENCE QTY DESIGNATION
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No specific multimeter
B. Referenced Information
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REFERENCE DESIGNATION
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AMM 49-51-52-000-003 Removal of the Surge Control Valve (8058KM) (131-9(A)) AMM 49-51-52-400-003 Installation of the Surge Control Valve (8058KM) (131-9(A)) AMM 49-61-34-000-003 Removal of the Electronic Control Box (ECB) (131-9(A)) AMM 49-61-34-400-003 Installation of the Electronic Control Box (ECB) (131-9(A)) ASM 49-61/01
3. Fault Confirmation
__________________
A. Read-out of ECB Trouble-Shooting Data
(1) Put the APU MASTER SW to the ON position.
(2) Get access to the APU LAST LEG/PREVIOUS LEG report.
(3) Push the '>' adjacent to the related CFDS failure message:
- the MCDU menu shows:
SCV LVDT PRIMARY SHOWS OPEN CIRCUIT
or
SCV LVDT SECONDARY SHOWS OPEN CIRCUIT
or
SCV TORQUE MOTOR SHOWS OPEN CIRCUIT
or
SCV TORQUE MOTOR SHOWS SHORT CIRCUIT
or
SCV LVDT EXCITATION CIRCUIT FAILURE
(4) Get access to the APU GND SCANNING menu.
4. Fault Isolation
_______________
R **ON A/C 001-049, 101-105, 107-107, 151-154, 201-207,
A. If the APU GND SCANNING menu gives the maintenance message:
SURGE CONTROL VALVE P18
associated with Fault Code Number (FCN) 85, 86, 111 or 112
- do a check for damage/contamination of electrical connector P18 of the SURGE CONTROL VALVE (P18)
(1) If the electriacl connector P18 is damaged/contaminated:
- do a repair/cleaning.
(2) If the electrical connector is OK:
- use a multimeter to do a resistance check across pin 4 and pin 5 pin 1 and pin 2 pin 7 and pin 8 of the SURGE CONTROL VALVE (P18).
(a) If the resistance are not between 20 Ohms and 100 Ohms (pin 4-5/pin 1-2) or between 10 Ohms and 80 Ohms (pin 7-8)
- replace the SURGE CONTROL VALVE (P18) (Ref. AMM TASK 49-51-52-000-003) and (Ref. AMM TASK 49-51-52-400-003).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 101-105, 107-107, 151-199, ∞∞49-00-81∞∞∞∞∞∞∞∞∞∞Page B225
201-210, Config-1 Aug 01/05 CES (b) If the resistance values are correct:
- do a check/repair of the aircraft wiring between ECB (59KD) 59KD-AB/D2,J8,D9,J7,G9,G6 and SURGE CONTROL VALVE (P18) P18/1,2,4,5,7,8 (Ref. ASM 49-61/01).
1 If the fault continues:
_
- replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-003) and (Ref. AMM TASK 49-61-34-400-003).
B. If the APU GND SCANNING menu gives the maintenance message:
ECB (59KD)
associated with Fault Code Number (FCN) 84
- do a check for damage/contamination of electrical connector P18 of the SURGE CONTROL VALVE (P18)
(1) If the electriacl connector P18 is damaged/contaminated:
- do a repair/cleaning.
(2) If the electrical connector is OK:
- use a multimeter to do a resistance check across pin 4 and pin 5 pin 1 and pin 2 pin 3 and pin 2 of the SURGE CONTROL VALVE (P18).
(a) If the resistance are not
between 20 Ohms and 100 Ohms
- replace the SURGE CONTROL VALVE (P18) (Ref. AMM TASK 49-51-52-000-003) and (Ref. AMM TASK 49-51-52-400-003).
(b) If the resistance values are correct:
- do a check/repair of the aircraft wiring between ECB (59KD) 59KD-AB/D2,D9,J7,J8,D10 and SURGE CONTROL VALVE (P18) P18/2,4,5,1,3 (Ref. ASM 49-61/01).
1 If the fault continues:
_
- replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-003) and (Ref. AMM TASK 49-61-34-400-003).
**ON A/C 001-049, 101-105, 151-199, 201-210,
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本文链接地址：A320 Trouble Shooting Manual 排故手册 机载辅助动力 2(119)
