ENGINE ((131-9(A))) - FAULT ISOLATION PROCEDURES
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TASK 49-20-00-810-803
APU Inlet-Temperature (T2) Sensor Fault (131-9(A))
1. Possible Causes
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- INLET TEMP SENSOR SHOWS OUT OF RANGE HIGH
- INLET TEMP SENSOR SHOWS OUT OF RANGE LOW
- damage/contamination of electrical connector P6
- INLET TEMPERATURE SENSOR (P6)
- aircraft wiring
- ECB (59KD)
- INLET TEMPERATURE SENSOR (8010KM)
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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AMM 49-23-14-000-001 Removal of the Sensor-APU Inlet Temperature (8010KM) (131-9(A)) AMM 49-23-14-400-001 Installation of the Sensor-APU Inlet Temperature (8010KM) (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 49-61/02
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 '>' adjacent to the related CFDS failure message:
- the MCDU menu shows
INLET TEMP SENSOR SHOWS OUT OF RANGE HIGH
or
INLET TEMP SENSOR SHOWS OUT OF RANGE LOW
(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:
INLET TEMP SENSOR P6
associated with Fault Code Number (FCN) 57
- do a check for damage/contamination of electrical connector P6 of the INLET TEMPERATURE SENSOR (P6).
(1) If the electrical connector P6 is damaged/contaminated:
- do a repair/cleaning.
(2) If the electrical connector is OK:
- use a multimeter to do a resistance check across pin A and pin B of the INLET TEMPERATURE SENSOR (P6).
(a) If the resistance is < 72 Ohms:
- replace the INLET TEMPERATURE SENSOR (P6) (Ref. AMM TASK 49-23-14-000-001) and (Ref. AMM TASK 49-23-14-400-001).
(b) If the resistance is between 72 Ohms and 200 Ohms:
- do a check and repair of the aircraft wiring from the ECB (59KD) AB/H4,H2 to the INLET TEMPERATURE SENSOR (P6) P6/A,B (Ref. ASM 49-61/02).
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:
INLET TEMP SENSOR P6
associated with Fault Code Number (FCN) 58
- do a check for damage/contamination of electrical connector P6 of the INLET TEMPERATURE SENSOR (P6).
「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, ∞∞49-20-00∞∞∞∞∞∞∞∞∞∞Page 202
201-210, Config-2 Aug 01/05 CES
(1) If the electrical connector P6 is damaged/contaminated:
- do a repair/cleaning.
(2) If the electrical connector is OK:
- use a multimeter to do a resistance check across pin A and pin B of the INLET TEMPERATURE SENSOR (P6).
(a) If the resistance is > 200 Ohms:
- replace the INLET TEMPERATURE SENSOR (P6) (Ref. AMM TASK 49-23-14-000-001) and (Ref. AMM TASK 49-23-14-400-001).
(b) If the resistance is between 72 Ohms and 200 Ohms:
- do a check and repair of the aircraft wiring from the ECB (59KD) AB/H4,H3 to the INLET TEMPERATURE SENSOR (P6) P6/A,B (Ref. ASM 49-61/02).
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).
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