TASK 31-33-00-810-801
DFDR (1TU) Inoperative
1. Possible Causes
_______________
- DFDR (1TU)
- wiring
2. Job Set-up Information
______________________
A. Referenced Information
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REFERENCE DESIGNATION
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AMM 31-33-00-710-001 Operational Test of the Power Interlocks and Status
Monitoring AMM 31-33-55-000-001 Removal of the Digital Flight Data Recorder (DFDR) AMM 31-33-55-400-002 Installation of the Digital Flight Data Recorder
(DFDR)
ASM 31-33/01
3. Fault Confirmation
__________________
A. Do the Operational Test of the Power Interlocks and Status Monitoring (Ref. AMM TASK 31-33-00-710-001).
4. Fault Isolation
_______________
R **ON A/C 001-049, 051-099, 101-105, 151-158, 201-209,
A. If the test gives the maintenance message DFDR:
- make sure that the CB 7TU and 4RK are closed,
- make sure that the ground control pushbutton is pushed on,
- do a check for 115 VAC at the DFDR (1TU) connectors AA/1 and AA/2 (Ref. ASM 31-33/01).
(1) If there is 115 VAC:
- replace the DFDR (1TU) (Ref. AMM TASK 31-33-55-000-001) and (Ref. AMM TASK 31-33-55-400-002).
(2) If there is no 115 VAC:
- do a check and repair the wiring as necessary (Ref. ASM 31-33/01), between: CB 7TU and relay 6RK A/B, CB 7TU and relay 8RK A/B, Relay 6RK pin A/4 and DFDR (1TU) connector AA/1, Relay 8RK pin A/3 and relay 6RK pin A/4
DFDR ground pin AA/6 and ground,
DFDR ground pin AA/21 and ground,
- do a check for 28VDC at the relay 6RK and 8RK pin A/X and A/Z (Ref. ASM 31-33/01)
(3) If the failure continues check and repair the wiring as necessary
(Ref. ASM 31-33/01) between:
DFDR (1TU) connector AA/23 and SDAC 1 (1WV1) ,SDAC 2 (1WV2) connector
AA/9K,
DFDR (1TU) connector AA/7 and FDIU (2TU) connector AA/9J, DFDR (1TU) connector AA/8 and FDIU (2TU) connector AA/9K, DFDR (1TU) connector AA/9 and FDIU (2TU) connector AA/9E, DFDR (1TU) connector AA/10 and FDIU (2TU) connector AA/9F.
R **ON A/C 106-149, 159-199, 210-299, 301-399, 401-499,
A. If the test gives the maintenance message DFDR:
- make sure that the CB 5TV and 4RK are closed,
- on the 21VU make sure that the RCDR GND CTL switch is on (the blue light indicator is on).
- do a check for 115 VAC at the DFDR (1TU) connectors AA/1 and AA/2 (Ref. ASM 31-33/01).
(1) If there is 115 VAC:
- replace the DFDR (1TU) (Ref. AMM TASK 31-33-55-000-001) and (Ref. AMM TASK 31-33-55-400-002).
(2) If there is no 115 VAC:
- do a check and repair the wiring if necessary (Ref. ASM 31-33/01), between: CB 7TU and relay 6RK A/B, CB 7TU and relay 8RK A/B, Relay 6RK pin A/4 and DFDR (1TU) connector AA/1, Relay 8RK pin A/3 and relay 6RK pin A/4
DFDR ground pin AA/6 and ground,
DFDR ground pin AA/21 and ground,
- do a check for 28VDC at the relay 6RK and 8RK pin A/X and A/Z (Ref. ASM 31-33/01)
(3) If the failure continues check and repair the wiring if necessary
(Ref. ASM 31-33/01) between:
DFDR (1TU) connector AA/23 and SDAC 1 (1WV1) ,SDAC 2 (1WV2) connector
AA/9K,
DFDR (1TU) connector AA/7 and FDIMU (10TV) connector AA/12G, DFDR (1TU) connector AA/8 and FDIMU (10TV) connector AA/12H, DFDR (1TU) connector AA/9 and FDIMU (10TV) connector AB/12G, DFDR (1TU) connector AA/10 and FDIMU (10TV) connector AB/12H.
**ON A/C ALL
B. Do the test given in paragraph 3.A. again to check the correct operation (no maintenance message display).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞31-33-00∞∞∞∞∞∞∞∞∞∞Page 203
Nov 01/03R
CES
R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-210,
TASK 31-33-00-810-802
FDIU (2TU) Inoperative
1. Possible Causes
_______________
- FDIU (2TU)
- AMU (1RN)
- Circuit Breaker 8TU
- wiring
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION
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