TASK 49-00-81-810-854
Total-Pressure Transducer (P23) Fault (131-9(A))
1. Possible Causes
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- TOTAL PRESSURE SENSOR SHOWS OUT OF RANGE
- TOTAL PRESSURE AND INLET PRESSURE DISAGREE
- TOTAL PRESSURE SENSOR SHOWS OUT OF RANGE LOW
- TOTAL PRESSURE SENSOR SHOWS OUT OF RANGE HIGH
- damage/contamination of electrical connector P23
- TOTAL PRESSURE TRANSDUCER (P23)
- aircraft wiring
- ECB (59KD)
- damage/contamination of electrical connector P24
- DIFFERENTIAL PRESSURE TRANSDUCER (P24)
- TOTAL PRESSURE TRANSDUCER (8044KM)
- DIFFERENTIAL PRESSURE TRANSDUCER (8043KM)
2. Job Set-up Information
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A. Referenced Information
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REFERENCE DESIGNATION
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AMM 49-51-16-000-002 Removal of the Transducer - Differential Pressure (8043KM) (131-9(A)) AMM 49-51-16-400-002 Installation of the Transducer - Differential Pressure (8043KM) (131-9(A)) AMM 49-51-17-000-002 Removal of the Transducer - Total Pressure (8044KM) (131-9(A)) AMM 49-51-17-400-002 Installation of the Transducer - Total Pressure (8044KM) (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 '>'-key adjacent to the related CFDS failure message.
(4) If the MCDU menu shows
TOTAL PRESSURE SENSOR SHOWS OUT OF RANGE
- do the Fault Confirmation that follows:
(a) Get access to the APU TEST menu.
(b) Push the TEST line key.
(5) If the MCDU menu shows
TOTAL PRESSURE AND INLET PRESSURE DISAGREE
or
TOTAL PRESSURE SENSOR SHOWS OUT OF RANGE LOW
or
TOTAL PRESSURE SENSOR SHOWS OUT OF RANGE HIGH
「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 A273
- do the Fault Confirmation that follows:
(a) Put the APU MASTER SW to the ON position.
(b) Get access to the APU GND SCANNING menu.
4. Fault Isolation
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R **ON A/C 001-049, 101-105, 107-107, 151-154, 201-207,
A. If the TEST menu or the APU GND SCANNING menu gives the maintenance message:
TOTAL PRESS XDCR P24
associated with Fault Code Number (FCN) 26, 28 or 29
- do a check for damage/contamination of electrical connector P23 of the TOTAL PRESSURE TRANSDUCER (P23)
(1) If the electriacl connector P23 is damaged/contaminated:
- do a repair/cleaning.
(2) If the electrical connector is OK:
- replace the TOTAL PRESSURE TRANSDUCER (P23) (Ref. AMM TASK 49-51-17-000-002) and (Ref. AMM TASK 49-51-17-400-002).
(a) If the fault continues:
- do a check and repair of the aircraft wiring between ECB (59KD) AB/A1,A4,A2,A3 and the TOTAL PRESSURE TRANSDUCER (P23) P23/1,2,3,4 (Ref. ASM 49-61/02).
(3) 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).
「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 A274
201-210, Config-1 Aug 01/05 CES
B. If the TEST menu or the APU GND SCANNING menu gives the maintenance message:
TOTAL PRESS XDCR P24
associated with Fault Code Number (FCN) 27
- do a check for damage/contamination of electrical connector P23 of the TOTAL PRESSURE TRANSDUCER (P23)
- do a check for damage/contamination of electrical connector P24 of the DIFFERENTIAL PRESSURE TRANSDUCER (P24)
(1) If the electriacl connector P23/P24 are damaged/contaminated:
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