(2) If the fault continues after the first flight on the subsequent day:
- do a check and repair the wiring from the ECB (59KD) AB/D9, J7, J8, D10 to the SERIAL NUMBER ENCODER P20/1, 2, 3, 4 (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 : 001-003, 051-099, 401-499, ∞∞49-70-00∞∞∞∞∞∞∞∞∞∞Page 210
Config-1 Aug 01/05 CES
R **ON A/C 001-003, 051-099, 401-499,
B. Do the test given in para. 3. NOTE : Make an entry in the applicable logbook that you must read the APU
____
CLASS 3 FAULTS after the first flight on the subsequent day.
INDICATING ((131-9(A))) - FAULT ISOLATION PROCEDURES
____________________________________________________
TASK 49-70-00-810-816
Speed Sensor P26 Fault (131-9(A))
1. Possible Causes
_______________
- SPEED SENSOR 1 SHOWS OPEN CIRCUIT
- SPEED SENSOR 2 SHOWS OPEN CIRCUIT
- SPEED SENSOR 1 SHOWS AMPLITUDE FAILURE
- SPEED SENSOR 2 SHOWS AMPLITUDE FAILURE
- damage/contamination of the electrical connector P26
- SPEED SENSOR 1 and/or 2
- aircraft wiring
- ECB (59KD)
- SPEED SENSOR (8060KM)
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
No specific multimeter
B. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 49-00-00-860-008 APU Start by External Power (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 49-71-13-000-003 Removal of the Speed Sensors (8060KM) (131-9(A)) AMM 49-71-13-400-003 Installation of the Speed Sensors (8060KM) (131-9(A)) ASM 49-61/01
3. Fault Confirmation
__________________
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.
「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 201
201-210, Config-2 Aug 01/05 CES
(4) If the MCDU menu shows:
SPEED SENSOR 1 SHOWS OPEN CIRCUIT
SPEED SENSOR 2 SHOWS OPEN CIRCUIT
- do the Fault Confirmation that follows:
(a) Get access to the APU GND SCANNING menu.
(5) If the MCDU menu shows
SPEED SENSOR 1 SHOWS AMPLITUDE FAILURE
SPEED SENSOR 2 SHOWS AMPLITUDE FAILURE
- 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:
SPEED SENSOR P26
associated with Fault Code Number (FCN) 7 or 8
- do a check for damage/contamination of the electrical connector P26 of the SPEED SENSORS 1 / 2.
(1) If the electrical connector of the SPEED SENSORS 1 and/or 2 is damaged/contaminated:
- do a repair/cleaning.
(2) If the electrical connector are OK:
- use a multimeter to do a resistance check of the electrical connector across pin 1 and pin 2 for the SPEED SENSOR 1 and pin 3 and pin 4 for the SPEED SENSOR 2.
(a) If the resistance is > 25 Ohms:
- replace the SPEED SENSOR 1 and/or 2 (Ref. AMM TASK 49-71-13-000-003) and (Ref. AMM TASK 49-71-13-400-003).
「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 202
201-210, Config-2 Aug 01/05 CES
(b) If the resistance is OK:
- do a check and repair of the aircraft wiring from the ECB (59KD) AB/E6,E7 to the electrical connector P26/1,2 (SPEED SENSOR 1) and the ECB (59KD) AB/D3,D4 to the electrical connector P26/3,4 (SPEED SENSOR 2) (Ref. ASM 49-61/01).
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