(b) If a fuel probe capacitance value is not with-in range, replace the related LRU (Ref. TSM PB 101) for the related Task number(s).
NOTE : The normal range of fuel probe capacitance values is given
____ in (Ref. TSM PB 301).
NOTE : A fuel probe can fail and still stay within its range
____ and/or not be reported on the FQIS STATUS page.
1 Do the test given in Para. 3.B.
_
(c) If the capacitive values of related fuel probe LRUs attached to a FQIS fuel tank harness are shown blank, fluctuate or are outside the range of a similar group:
1_ Do a check of the related aircraft wiring (including the
common drive screen) between the FQIC rack-connector and the
shorting plug as given in a procedure for a fuel probe in the
given group.
a Repair all the unserviceable wiring and connectors (Ref.
_ ESPM 20-00-00).
2 Trouble shoot the related harness as given in a procedure for
_ a fuel probe in the applicable group.
a If necessary, replace the applicable harness.
_ 3 Trouble shoot the fuel probes on the related harness.
_ Start with the multi-sensor (ULTRA COMP, DUAL COMP), if applicable, fuel probes first.
4 Do the test given in Para. 3.B.
_
「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 : 301-399, ∞∞28-42-00∞∞∞∞∞∞∞∞∞∞Page D212
May 01/05R
CES R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
TASK 28-42-00-810-875
FQIs Degraded, Malfunction in a W/Tank when Fused Connector Plugs are Installed An Alternative Task for the Connector Plug Only and Caused by Moisture Ingress
WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
1. Possible Causes
_______________
- fused connector plug 4041VC-A
- fused connector plug 4042VC-A
- fused connector plug 4043VC-A
- fused connector plug 4044VC-A
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific multimeter
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
28-42-00-810-801 Fuel Quantity Indication Computer (FQIC) 3QT
28-42-00-810-873 Fuel Quantity Probe - A Malfunction in the Wing Tank when Fused Connector Plugs are Installed - An Alternative Task (procedure) for the Connector Plug Only
ESPM 20-52-22 AMM 05-25-70-200-004 Zonal Inspection of the False Spar Box AMM 28-42-00-740-003 Interrogation of the FQIS Input Parameters Pages ASM 28-42/05 ASM 28-42/06 ASM 28-42/07 ASM 28-42/08 TFU 28.42.00.039
「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 D213
201-299, 401-499, Aug 01/05 CES 3. Fault Confirmation
__________________
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
Post SB 28-1087 For A/C 001-049,051-061,101-105,201-203,
A. Table of the circuit breakers used in this procedure:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU FUEL/FQI/CHAN/1 1QT A13 121VU FUEL/FQI/CHAN/2 2QT M27
B. Test
NOTE : This task gives an alternative procedure for trouble shooting a
____ degraded FQI display with a reported FQIC (3QT) malfunction. It is related to the wing-tank fused connector plugs only (fault caused by water/moisture ingress).
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