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Fuel System Adjustment
WARNING
The procedures and values provided apply to
TCM fuel injected engines that have not been
modified from their type design. Refer to
supplemental type certificate (STC) holder
information and instructions for aircraft and
engines that have been modified from their
type design.
Aircraft and engines that have been modified from
their type design must have the fuel injection system
maintained in accordance with the Supplemental
Type
Certificate
instructions.
CAUTION...
Engine performance, service life and reliability will
be compromised if the engine's fuel injection system
is neglected.
The following adjustment procedures are presented
in a sequential format that must be followed to
insure proper fuel system adjustment. Reference the
applicable Aircraft Maintenance Manual for detailed
fuel system adjustment and maintenance procedures.
Any fuel system that can not be adjusted to meet the
specified values will require repair or replacement of
the affected components prior to further engine
operation.
CAUTION...
Refer to section 2, chapter 9, Tables 1 and 2 for
specified values when torquing all hose connections
and fittings.
Adjustment Tools And Equipment Required
A complete set of tools and test equipment is
essential for correct setup of TCM fuel injection
systems. Various combinations of these tools and
equipment will be used, depending on the engine
model. A proper inventory of tools and equipment
for fuel system adjustment will include the
following:
1.
Holders
FAA
approved
TCM recommends the Model 20 ATM - C Porta
Test Unit P/N 630045-20 ATM-C or equivalent
to insure the fuel injection system meets all
pressure
and
flow
alternative procedure would be to use
calibrated gauges. You may acquire a Model
20 ATM-C Porta Test Unit by contacting the
following company:
AERO TEST, Inc.
29300 Goddard Road
Romulus, Michigan 48174
(313) 946-9000
a. One
(1)
calibrated
graduated in 1 PSI increments. This gauge
will be used for unmetered pressure
measurement.
b. One (1) calibrated differential gauge, 0-50
PSI
maximum,
(maximum) increments. This gauge will be
used for metered pressure measurements and
verification of aircraft fuel flow gauge on
turbocharged engines only.
2. Two (2) P/N MS51523-B4 swivel tee. These
fittings will be used to tee into fuel lines for
unmetered and metered pressure reference.
3. Hoses of appropriate diameters and sufficient
lengths to keep personnel and equipment away
from propeller arc area.
4. Common hand tools including: 7/8", 11/16",
9/16", 1/2", 3/8", 7/16", 11/32", and 5/16"
wrenches. A 1/4" drive: ratchet and sockets,
universal swivel, extension and a 5/32" allen
wrench, common screw driver, a calibrated
torque wrench, an oil can, mirror and flashlight.
Safety equipment including hearing and eye
protection.
5. Tachometer verification instrument - various
types are available. Verify aircraft tachometer
accuracy prior to fuel system adjustment.
Post Maintenance
specifications.
An
0-60
PSI
gauge,
graduated
in
.2
PSI
19-3
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