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:
DATA MEMORY MODULE P20
associated with Fault Code Number (FCN) 240
- do a check for damage/contamination of the electrical connector P20 of the DATA MEMORY MODULE (DMM)
(1) If the electrical connector P20 of the DMM is damaged/contaminated:
- do a repair/cleaning.
(2) If the electrical connector P20 of the DMM is OK:
- disconnect the electrical connector P20 at the DMM/APU interface.
- do a check and repair of the aircraft wiring from the ECB (59KD) AB/F11,F7 to structural ground; required value > 100 kOhms and the ECB (59KD) AB/F11 to AB/F7; required value > 100 kOhms, (Ref. ASM 49-61/01).
- put a jumper across the sockets 8 and 9 of the electrical connector P20 of the DMM on the APU harness side.
- do a check and repair of the aircraft wiring from the ECB (59KD) AB/F11 to AB F7; required value < 10 Ohms and the ECB (59KD) AB/J2,J3 to structural ground; required value > 100 kOhms and the ECB (59KD) AB/J2 to AB/J3; required value > 100 kOhms, (Ref. ASM 49-61/01).
- put a jumper across the sockets 10 and 11 of the electrical connector P20 of the DMM on the APU harness side.
- do a check and repair of the aircraft wiring from the ECB (59KD) AB/J2 to AB/J3; required value < 10 Ohms and the ECB (59KD) AB/C6 to structural ground; required value > 100 kOhms and the ECB (59KD) AB/C6 to AB/F11; required value > 100 kOhms, (Ref. ASM 49-61/01).
- put a jumper across the sockets 6 and 7 of the electrical connector P20 of the DMM on the APU harness side.
- do a check and repair of the aircraft wiring from the ECB (59KD) AB/C6 to AB/F11; required value < 10 Ohms, (Ref. ASM 49-61/01).
「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 218
201-210, Config-2 Aug 01/05 CES
(a) If the resistance values are out of the specified limits:
- replace DATA MEMORY MODULE (DMM) (P20) (Ref. AMM TASK 49-73-32-000-001) and (Ref. AMM TASK 49-73-32-400-001).
(b) If the resistance values are in the specified limits:
- 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:
DATA MEMORY MODULE P20
associated with Fault Code Number (FCN) 241 or 244
- do a check for damage/contamination of the electrical connector P20 of the DATA MEMORY MODULE (DMM)
(1) If the electrical connector P20 of the DMM is damaged/contaminated:
- do a repair/cleaning.
(2) If the electrical connector P20 of the DMM is OK:
- disconnect the electrical connector P20 at the DMM/APU interface.
- do a check and repair of the aircraft wiring from the ECB (59KD) AB/F11,F7 to structural ground; required value > 100 kOhms and the ECB (59KD) AB/F11 to AB/F7; required value > 100 kOhms, (Ref. ASM 49-61/01).
- put a jumper across the sockets 8 and 9 of the electrical connector P20 of the DMM on the APU harness side.
- do a check and repair of the aircraft wiring from the ECB (59KD) AB/F11 to AB F7; required value < 10 Ohms and the ECB (59KD) AB/J2,J3 to structural ground; required value > 100 kOhms and the ECB (59KD) AB/J2 to AB/J3; required value > 100 kOhms, (Ref. ASM 49-61/01).
- put a jumper across the sockets 10 and 11 of the electrical connector P20 of the DMM on the APU harness side.
- do a check and repair of the aircraft wiring from the ECB (59KD) AB/J2 to AB/J3; required value < 10 Ohms and the ECB (59KD) AB/C6 to structural ground; required value > 100 kOhms and the ECB (59KD) AB/C6 to AB/F11; required value > 100 kOhms, (Ref. ASM 49-61/01).
- put a jumper across the sockets 6 and 7 of the electrical connector P20 of the DMM on the APU harness side.
- do a check and repair of the aircraft wiring from the ECB (59KD) AB/C6 to AB/F11; required value < 10 Ohms, (Ref. ASM 49-61/01).
「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, 151-154, ∞∞49-70-00∞∞∞∞∞∞∞∞∞∞Page 219
201-207, Config-2 Aug 01/05 CES
(a) If the resistance values are out of the specified limits:
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