TASK 49-70-00-810-818
EGT TCPLE Rake 2 Fault (131-9(A))
1. Possible Causes
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- EGT2 SENSOR SHOWS OUT OF RANGE LOW
- EGT2 SENSOR DISAGREES WITH EGT1 SENSOR > 66C
- damage/contamination of the electrical connections
- EGT 2 THERMOCOUPLE
- aircraft wiring
- ECB (59KD)
- EGT 1 THERMOCOUPLE
- PRIMARY FUEL-NOZZLE and MANIFOLD
- SECONDARY FUEL-NOZZLE and MANIFOLD
- EGT TCPLE RAKE (8057KM2)
- PRIMARY FUEL-NOZZLE and MANIFOLD (8020KM)
- SECONDARY FUEL-NOZZLE and MANIFOLD (8021KM)
2. Job Set-up Information
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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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49-70-00-810-817 EGT TCPLE Rake 1 Fault (131-9(A))
AMM 49-00-00-860-008 APU Start by External Power (131-9(A))
AMM 49-31-41-000-003 Removal of the Primary and Secondary Fuel-Nozzle
(131-9(A)) AMM 49-31-41-400-003 Installation of the Primary and Secondary Fuel-Nozzle (131-9(A)) AMM 49-31-42-000-004 Removal of the Primary and Secondary Fuel-Manifold (8020KM) and (8021KM) (131-9(A)) AMM 49-31-42-400-006 Installation of the Primary and Secondary Fuel-Manifold (8020KM) and (8021KM) (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)) AMM 49-72-15-000-002 Removal of the Thermocouples (8057KM) (131-9(A)) AMM 49-72-15-400-003 Installation of the Thermocouples (8057KM) (131-9(A)) ASM 49-61/01 3. Fault Confirmation
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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 '>'-key adjacent to the related CFDS failure message.
(4) If the MCDU menu shows:
EGT2 SENSOR SHOWS OUT OF RANGE LOW
- do the Fault Confirmation that follows:
(a) Get access to the APU GND SCANNING menu.
(5) If the MCDU menu shows:
EGT2 SENSOR DISAGREES WITH EGT1 SENSOR 66C
- do the Fault Confirmation that follows:
(a) Start the APU and apply Electrical Load and Bleed Air (Ref. AMM TASK 49-00-00-860-008).
(b) 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:
EGT TCPLE RAKE 2
associated with Fault Code Number (FCN) 46
- do a check for damage/contamination of the electrical connections of the EGT 2 THERMOCOUPLE.
(1) If the electrical connection of the EGT 2 THERMOCOUPLE is damaged/contaminated:
- do a repair/cleaning.
(2) If the electrical connections of the EGT 2 THERMOCOUPLE is OK:
- use a multimeter to do a resistance check across the terminals chromel and alumel of the EGT 2 THERMOCOUPLE.
(a) If the resistance is >20 Ohms:
- replace the EGT 2 THERMOCOUPLE (Ref. AMM TASK 49-72-15-000-002) and (Ref. AMM TASK 49-72-15-400-003).
「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, ∞∞49-70-00∞∞∞∞∞∞∞∞∞∞Page 212
201-210, Config-2 Aug 01/05 CES (b) If the resistance is < 20 Ohms:
- do a check and repair of the aircraft wiring from the ECB (59KD) AB/A8,A9 to the EGT 2 THERMOCOUPLE terminals chromel/alumel (Ref. ASM 49-61/01).
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