S 424-008

 (2)  
Put the densitometer in its position on the mounting bracket.

 NOTE: Make sure the UP arrow on the densitometer is aligned
____
 correctly.

 S 434-009
 (3)  
Install the screws, washers, and nuts (4 locations) to attach the densitometer to the mounting bracket.

 S 284-029

 (4)  
Measure the bonding resistance between the densitometer and the tank structure (faying surface bond) (SWPM 20-20-00).

 NOTE: The bonding resistance must not be more than 0.010 ohm.
____
 S 434-014
 (5)  Install the terminals of the FQIS wire bundles (8 locations) on the terminal stud of the densitometer.
 NOTE: The terminal studs have different dimensions to prevent
____ errors in the installation. Install each terminal on the correct terminal stud.
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 S 434-015
 (6)  Tighten the nuts to these torque limits:
 ~........................................................... | TERMINAL | TORQUE | NUT SIZE | ............................................................. | SENSE | 6-8 pound-inches | 0.112-40 | ............................................................. | SENSE SHIELD | 12-15 pound-inches | 0.138-32 | ............................................................. | DRIVE -| 15-20 pound-inches | 0.164-32 | ............................................................. | DRIVE + | 25-30 pound-inches | 0.190-32 | ............................................................. | KR0 | 25-30 pound-inches | 0.190-32 | ............................................................. | KR1 | 15-20 pound-inches | 0.164-32 | ............................................................. | KR2 | 12-15 pound-inches | 0.138-32 | ............................................................. | KR3 | 6-8 pound-inches | 0.112-40 | 2....................…........................….............1
 S 434-018
 (7)  
Install the nuts on the terminal block of the densitometer.

 S 414-011

 (8)  
For the densitometer in the center wing tank, install the access doors in the spanwise beam, 131AZ and 131BZ (AMM 28-11-09/401).

 S 864-012

 (9)  
Go out of and close the fuel tank (AMM 28-11-00/201).

 E.
Operational Test

 S 744-031
 (1)  
Do this CMCS ground test with the fuel tank(s) dry:
 <FUEL QUANTITY IND (AMM 28-41-00/501).

 (a)  
If the ground test fails, with related CMCS densitometer messages, then do the corrective action per the 28-CMCS MESSAGE INDEX.

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 (b)  If the ground test passes, then continue.
 S 654-032
 (2)  Add or transfer fuel to fully cover the densitometers (AMM 12-11-01/301), (AMM 28-26-00/201).
 NOTE: Table 401 contains the minimum fuel quantity necessary to
____
 cover the densitometers.

 S 744-034
 (3)  Do this CMCS ground test again (with fuel in the tank): <FUEL QUANTITY IND (AMM 28-41-00/501).
 NOTE: Do not do this test immediately after a refuel operation.
____ Let the densitometer values stabilize before you do this test.
 (a)  
If the ground test fails, with related CMCS densitometer messages, then do the corrective action per the 28-CMCS MESSAGE INDEX.

 (b)  
If the ground test passes, then the densitometer is
 satisfactory.

 ~.............................................
 | FUEL TANK | MINIMUM FUEL QUANTITY |
 ...............................................
 | M1 AND M4 | 324 GALS (1227 LITERS) |
 ...............................................
 | M2 AND M3 | 107 GALS (405 LITERS) |
　
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