4. Fault Isolation
_______________
R **ON A/C 001-049, 101-105, 107-107, 151-154, 201-207,

R A. If the APU GND SCANNING menu gives the maintenance message:
R
R INLET PRESS XDCR P22
R
R associated with Fault Code Number (FCN) 21, 22, 23 or 24
R
R - do a check for damage/contamination of electrical connector P22 of the
R INLET PRESSURE TRANSDUCER (P22)

R (1) If the electrical connector P22 is damaged/contaminated:
R - do a repair/cleaning.

R (2) If the electrical connector is OK:
R - replace the INLET PRESSURE TRANSDUCER (P22) (Ref. AMM TASK 49-51-R 21-000-001) and (Ref. AMM TASK 49-51-21-400-001).

R (a) If the fault continues:
R - do a check and repair of the aircraft wiring from the ECB
R (59KD) AB/C8,C9 to the INLET PRESSURE TRANSDUCER (P22) P22/4,5
R (Ref. ASM 49-61/02).

R  1_  If the fault continues:
R  - replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-003) and 
R  (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 A296
 201-210, Config-1 Aug 01/05 CES

R  B. If the TEST menu or the APU GND SCANNING menu gives the maintenance 
R  message: 
R 
R  TOTAL PRESS XDCR P24 
R 
R  associated with Fault Code Number (FCN) 27 
R 
R  - do a check for damage/contamination of electrical connector P23 of the 
R  TOTAL PRESSURE TRANSDUCER (P23) 
R  - do a check for damage/contamination of electrical connector P24 of the 
R  DIFFERENTIAL PRESSURE TRANSDUCER (P24) 
R  (1) If the electriacl connector P23/P24 are damaged/contaminated: 
R  - do a repair/cleaning. 
R  (2) If the electrical connectors are OK: 
R  - replace the TOTAL PRESSURE TRANSDUCER (P23) (Ref. AMM TASK 49-51-
R  17-000-002) and (Ref. AMM TASK 49-51-17-400-002). 
R  (a) If the fault continues: 
R  - replace the DIFFERENTIAL PRESSURE TRANSDUCER (P24) (Ref. AMM 
R  TASK 49-51-16-000-002) and (Ref. AMM TASK 49-51-16-400-002). 
R  1 If the fault continues:_ 
R  - replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-003) and 
R  (Ref. AMM TASK 49-61-34-400-003).
 **ON A/C 001-049, 101-105, 151-199, 201-210,
 Post SB 49-1062 For A/C 001-049,101-105,151-154,201-207, 
R  A. If the APU GND SCANNING menu gives the maintenance message: 
R 
R  INLET PRESS XDCR (8048KM) 
R 
R  associated with Fault Code Number (FCN) 21, 22, 23 or 24 
R 
R  - do a check for damage/contamination of electrical connector P22 of the 
R  INLET PRESSURE TRANSDUCER (8048KM) 
R  (1) If the electrical connector P22 is damaged/contaminated: 
R  - do a repair/cleaning. 
R  (2) If the electrical connector is OK: 
R  - replace the INLET PRESSURE TRANSDUCER (8048KM) (Ref. AMM TASK 49-
R  51-21-000-001) and (Ref. AMM TASK 49-51-21-400-001). 
R  (a) If the fault continues: 
R  - do a check and repair of the aircraft wiring from the ECB 
R  (59KD) AB/C8,C9 to the INLET PRESSURE TRANSDUCER (8048KM) 
R  P22/4,5 (Ref. ASM 49-61/02).

 「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 A297
 201-210, Config-1 Aug 01/05 CES

R  1 If the fault continues:_ 
R  - replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-003) and 
R  (Ref. AMM TASK 49-61-34-400-003). 
R  B. If the TEST menu or the APU GND SCANNING menu gives the maintenance 
R  message: 
R 
R  TOTAL PRESS XDCR (8044KM) 
R 
R  associated with Fault Code Number (FCN) 27 
R 
R  - do a check for damage/contamination of electrical connector P23 of the 
R  TOTAL PRESSURE TRANSDUCER (8044KM). 
R  - do a check for damage/contamination of electrical connector P24 of the 
R  DIFFERENTIAL PRESSURE TRANSDUCER (8043KM) 
R  (1) If the electriacl connectors P23/P24 are damaged/contaminated: 
　
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