TM 55-1520-240-23-7
8-80.5.1
TEST AND ADJUST FUEL QUANTITY INDICATOR USING PSD 60-1AF FUEL QUANTITY
TEST SET
8-80.5.1
INITIAL SETUP
Applicable Configurations:
All
Tools:
Electrical Repairer’s Tool Kit, NSN 5180-00-323-4915
Fuel Quantity Test Set PSD60-1AF, NSN
6625-01-297-5305
Fuel Quantity System "Dual T" cable PSDAF-106
Hearing Protectors
Fuel Sump and Drain Equipment
Phillips Screwdriver No. 2
Jeweler’s Screwdriver
Materials:
None
Personnel Required:
Aircraft Electrician
Inspector
Equipment Condition:
Battery Connected (Task 1-39)
AC Electrical Power On (Task 1-67)
Fuel Tank Left and Right Forward Access Panel Open
(Task 2-3.1)
Fuel Quantity Operations Test I/A/W/ TM
55-1520-240-T-2 (Task 8-11.3)
Helicopter Defueled (Task 10-34 or 10-35)
Ground Aircraft to Earth Ground Per Approved
Procedures
SAFETY PRECAUTIONS REQUIRED WHEN TESTING
AND/OR CALIBRATING FUEL QUANTITY SYSTEM
DO NOT USE ANY FUEL QUANTITY
TESTER OTHER THAN THE
PSD60-1AF with this procedure. The
PSD60-1AF is battery-powered, and
therefore inherently safe. Testers
powered by 115 vac require voltage
and ground continuity tests which are
not required by the PSD60-1AF.
ALWAYS GROUND THE TESTER to
a good, clean aircraft ground. DO
NOT CONNECT ground wire behind
circuit breaker panels or near any
exposed power termination. Failure
to comply could result in a fuel tank
explosion or fire, and serious injury
to personnel.
NEVER CONNECT a fuel gauge or
signal conditioner unit to an electrically
live connector. Such practice may be
a hazard to the aircraft and personnel,
and may damage the gauge or SCU.
If a circuit breaker pops during
calibration or troubleshooting, a short
circuit is indicated. Refer to FAULT
ISOLATION PROCEDURES and
correct fault before reapplying power.
USE ONLY AUTHORIZED TEST
EQUIPMENT to test, troubleshoot,
and calibrate the fuel quantity system.
Shop testers, including multimeters
and meggers, are NOT CERTIFIED
SAFE for use on any wiring to the fuel
tank. Failure to comply could result
in a fuel tank explosion or fire, and
serious injury to personnel.
Always ground the aircraft under
test to earth ground per approved
procedures. Failure to comply could
result in a fuel tank explosion or fire,
and could result in serious injury to
personnel.
DO NOT attempt to calibrate a fuel
quantity system that has a known
failure.
APU causes dangerous noise levels.
Wear appropriate hearing protection.
8-233
