R - FOR 21QT2, 23QT2, 25QT2, 26QT2, 54QT2, 56QT2
R remove 640AB
R - FOR 28QT2, 27QT1
R remove 640BB
R - FOR 29QT2
R remove 640DB
R - FOR 30QT2
R remove 640FB
R - FOR 34QT2
R - remove 640QB
R - FOR 59QT2
R remove 640HB.
R (4) Make sure that the spring-loaded surge door 540AZ (640AZ) is open and
R safetied with the HOOK-COVER (RIB 2 SURGE DOORS).
R (5) Make sure that the spring-loaded surge door 540BZ (640BZ) is open and
R safetied with the HOOK-COVER (RIB2-SURGE DOORS).
R Subtask 28-42-15-865-063
R C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and
R tagged
R -------------------------------------------------------------------------------
R PANEL DESIGNATION IDENT. LOCATION
R -------------------------------------------------------------------------------
R 49VU FUEL/FQI/CHAN/1 1QT A13
R 121VU FUEL/FQI/CHANNEL/1 AND 2 8QT L26
R 121VU FUEL/FQI/CHAN/2 2QT M27
R 4. Procedure_________
R Subtask 28-42-15-420-057
R A. Preparation for Installation
R (1) Clean the component interfaces and the adjacent areas with a
R MISCELLANEOUS (Material No. 19-003) made moist with CLEANING AGENTS
R (Material No. 11-026).
R (2) Do an inspection of the component interface and/or the adjacent area.
R (3) Make sure that the parts retained from the removed component are
R clean and in the correct condition.
R Subtask 28-42-15-420-058
R B. Installation of the Fuel-Quantity-Probe
R CAUTION : REFER TO THE MATCH MARKS MADE DURING THE REMOVAL WHEN YOU_______
R CONNECT THE ELECTRICAL WIRES.
R INCORRECT CONNECTION OF THE WIRES WILL CAUSE DAMAGE TO
R EQUIPMENT.
R FOR 21QT1, 21QT2
R (Ref. Fig. 405/TASK 28-42-15-991-004)
R (1) Installation of the probe 21QT1 (21QT2):
R (a) Install the bracket (13) on the probe (11).
R (b) Put the probe (11) in the correct position and loosely install
R the bolts (12), the bolts (10) and the washers (9).
R (c) Measure the clearance between the structure and the top and
R bottom of the probe(11). Make sure that the clearance is a
R minimum of 7.0 mm (0.2755 in.).
R NOTE : When a probe is installed, a minimum clearance of 7.0 mm____
R (0.2755 in.)is recommended. (A clearance of less than 7.0
R mm (0.2755 in.) but more than 5.0 mm (0.1968 in.) is
R acceptable, if local installation does not allow the
R recommended clearance)
R (d) To prevent possible static discharge, make sure that the fuel
R probe is not less than 5.0 mm (0.1968 in.)from:
R - the nearest structure
R - rib and tank wall
R - pipework
R - brackets and p-clips
R - fasteners and other metal parts.
R (e) TORQUE the bolts (10) to between 0.45 and 0.56 m.daN (39.82 and
R 49.55 lbf.in) (Ref. TASK 20-28-00-912-002).
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