(a) go to the TROUBLE SHOOTING DATA page.
(2) If the TROUBLE SHOOTING DATA page gives the maintenance message LIQD LVL XMTR OUTPUT VALUE AT FAILURE ENTRY (MILLIAMP), LIQD LVL SNSR OUTPUT VALUE AT FAILURE ENTRY (VOLT):
- clean the LLT reference line, (Ref. AMM TASK 38-31-00-100-009).
(a) If the fault continues:
- replace the XMTR-LEVEL PHASE OFF (40MG), (Ref. AMM TASK 38-31-62-000-001) and (Ref. AMM TASK 38-31-62-400-001).
(b) If the fault continues:
- Replace the SENSOR-LEVEL (41MG), (Ref. AMM TASK 38-31-63-000-001) and (Ref. AMM TASK 38-31-63-400-001).
(c) If the fault continues:
- replace the DECODER/ENCODER UNIT B (300RH7), (Ref. AMM TASK 23-73-47-000-001) and (Ref. AMM TASK 23-73-47-400-001).
(d) If the fault continues:
- replace the DEU-B (300RH8), (Ref. AMM TASK 23-73-47-000-001) and (Ref. AMM TASK 23-73-47-400-001).
B. Test
(1) Do the test as given in paragraph 3. A. to check the correct
operation.
(2) After the subsequent flight, make sure that the fault does not
continue.
TASK 38-31-00-810-845
28V failure
1. Possible Causes
_______________
- DEU-B (300RH8)
- AIRCRAFT WIRING
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 23-73-47-000-001 Removal of the Decoder/Encoder Units (DEU) B 300RH AMM 23-73-47-400-001 Installation of the Decoder/Encoder Unit (DEU) B
300RH
AMM 38-31-00-710-009 Operational Test of the Toilet Unit
AMM 38-31-00-740-001 BITE Test of the Vacuum Toilet System
ASM 38-31/01
38-31-00-991-001-A Fig. 201A
3. Fault Confirmation
__________________
A. Do a test of the vacuum toilet system (Ref. AMM TASK 38-31-00-710-009).
B. Do the procedure to get access to the CFDS SYSTEM REPORT/TEST menu PAGE (Ref. AMM TASK 38-31-00-740-001).
4. Fault Isolation
_______________
(Ref. Fig. 201A/TASK 38-31-00-991-001-A)
A. If the test gives a different maintenance message, you can find the related trouble shooting procedure in the applicable Page Block 101.
(1) If the LAST/PREVIOUS LEGS Report gives the maintenance message LLT (40MG) and LLS (41MG) and VACU GEN (37MG) SPLY: and The FAP gives the maintenance messages VACUUM SYSTEM DISABLED ON GROUND and NO WASTE QUANTITY DATA AVAILABLE:
(a) do a check of the AIRCRAFT WIRING for 28VDC at:
- the liquid level transmitter pin B,
- the liquid level sensor pin A,
- the vacuum generator plug B pin A, C
- the motor start relay pin G, H.
「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 : 106-149, 301-399, 401-499, ∞∞38-31-00∞∞∞∞∞∞∞∞∞∞Page 269
Aug 01/05 CES
(b) If there is no 28VDC repair the aircraft wiring as necessary (Ref. ASM 38-31/01)
(2) If the fault continues:
- Replace the DEU-B (300RH8), (Ref. AMM TASK 23-73-47-000-001) and (Ref. AMM TASK 23-73-47-400-001).
B. Test
(1) Do the test as given in paragraph 3. A. to check the correct operation.
(2) After the subsequent flight, make sure that the fault does not continue.
TASK 38-31-00-810-846
FAP - Maintenance Messages
1. Possible Causes
_______________
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