- CADENSICON-RIB 2-3, R WNG TK INR GROUP A (19QT2)
- CADENSICON-CTR TK (20QT)
- PROBE-FUEL QTY NO 4 AND CIC,RIB 2-3 R WNG TK INR GRP B (24QT2)
- PROBE-FUEL QTY, NO 5 AND CIC, CTR TK GROUP B (39QT)
- fuel contamination (example, water or microbiological)
- aircraft wiring
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
28-42-00-810-802 Fuel Quantity - Cadensicon 19QT1(2), Left(Right) Wing 28-42-00-810-803 Fuel Quantity - Cadensicon 20QT, Center Tank 28-42-00-810-807 Fuel Quantity/CIC Probe 24QT1(2), Left(Right) Wing
Tank
28-42-00-810-822 Fuel Quantity/CIC Probe 39QT, Center Tank
AMM 12-11-28-650-003 Pressure Refuel with Automatic Control
AMM 12-11-28-650-004 Pressure Refuel with Manual Control
AMM 12-32-28-281-001 Drain Water Content
AMM 12-32-28-281-003 Sample Fuel for Microbiological Contamination
Analysis AMM 28-25-00-650-001 Pressure Defuel AMM 28-25-00-650-003 To Drain Remaining Fuel from the Wing Tanks and the
Center Tank AMM 28-42-00-740-001 Status Report (BITE) AMM 28-42-34-000-001 Removal of the Fuel Quantity-Indicating Computer
(FQIC) (3QT) AMM 28-42-34-400-001 Installation of the Fuel Quantity-Indicating Computer (FQIC) (3QT)
「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, 051-099, 101-149, 151-199, ∞∞28-42-00∞∞∞∞∞∞∞∞∞∞Page D222
201-299, 401-499, Aug 01/05 CES
3. Fault Confirmation
__________________
A. Table of the circuit breakers referred to in this procedure:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU FUEL/FQI/CHAN/1 1QT A13 121VU FUEL/FQI/CHAN/2 2QT M27
B. Test
Use this procedure if:
- during the FQIS operation, with the two (28VDC supply) C/Bs of the FQIC 3QT closed, no FQIS normal mode or class 3 fault messages are given on the CFDS-FUEL
- during the Status Report (BITE) when each C/B of the FQIC 3QT is pulled (in sequence), it causes the powered channel tank grade to change from GRADE 1 to 4 on the CFDS - FUEL, FQIS STATUS.
NOTE : The operating grade numbers for each channel (given before), is as
____
follows:
- GRADE 1 = Normal Operation
- GRADE 4 = Failed Operation (FQIS displays show crosses).
(1) Make sure that all the applicable fuel and fuel tank scheduled servicing tasks from the Maintenance Planning Document (MPD) have been complied with.
NOTE : Steps (1) thru (3) are necessary to eliminate (as far as is
____ possible) the effects of fuel contamination (example, water or microbiological).
(2) If you are not sure when the fuel tanks were last:
(a) Sampled for microbiological contamination, do (Ref. AMM TASK 12-32-28-281-003).
(b) Drained of water content, do (Ref. AMM TASK 12-32-28-281-001).
(3) If you are not sure of the quanlity of all the fuel in the aircraft tanks:
(a) Defuel the aircraft (Ref. AMM TASK 28-25-00-650-001).
(b) Drain the remaining fuel from the fuel tanks (Ref. AMM TASK 28-25-00-650-003).
(c) Refuel (with fuel of known specification) (Ref. AMM TASK 12-11-28-650-003) or (Ref. AMM TASK 12-11-28-650-004).
「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, 051-099, 101-149, 151-199, ∞∞28-42-00∞∞∞∞∞∞∞∞∞∞Page D223
201-299, 401-499, Aug 01/05 CES
(4) Do the Status Report (BITE) (Ref. AMM TASK 28-42-00-740-001).
(a) If, during channel 1 operation (when C/B-2QT pulled) the FQIS STATUS shows:
- CH1 GRADE 4 and CH2 GRADE X, do Para. 4.A.
- CH1 GRADE 1 and CH2 GRADE X, no maintenance steps are necessary.
(b) If, during channel 2 operation (when C/B-1QT pulled) the FQIS STATUS shows:
- CH1 GRADE X and CH2 GRADE 4, do Para. 4.B.
- CH1 GRADE X and CH2 GRADE 1, no maintenance steps are necessary.
4. Fault Isolation
_______________
A. Procedure - When Channel 1 Shows Grade 4
(1) Temporarily replace the FQIC 3QT with a serviceable item (Ref. AMM TASK 28-42-34-000-001) and (Ref. AMM TASK 28-42-34-400-001).
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