TM 55-1520-240-23-7
8-80.5.1
TEST AND ADJUST FUEL QUANTITY INDICATOR USING PSD 60-1AF FUEL QUANTITY
TEST SET (Continued)
8-80.5.1
PART III. TESTING AND TROUBLESHOOTING FUEL
QUANTITY SYSTEM
SECTION A: MEASURING CAPACITANCE OF EMPTY
TANKS
1.
Read and observe all safety precautions listed at
the beginning of this procedure.
2.
Ground aircraft to earth ground per approved
procedures.
3.
Completely drain sumps. Failure to do so
invalidates measurements.
4.
Open fuel tank access panel for tank to be
measured.
5.
Connect PSD60-1AF Fuel Quantity System
tester CHASSIS jack (J-7) to airframe ground
between MAIN and AUX fuel tank (Figure 1)
(STA 210.00).
6.
Lift latches to unlock tester. Turn ON-OFF switch
to ON. If words "LO BAT" appear in upper left
corner of LCD (Figure 24), replace batteries.
7.
Allow tester to warm up for 3 minutes before
taking any measurements.
8.
Connect PSDAF-106 "T" cable lead marked
"MAIN & AUX HIZ" to TANK UNITS HIZ terminal
(J-5) (Figure 10).
Figure 24. LO BAT Indication
8-246
Change 1
