Supplement Airplane Maintenance Manual
Cessna 172 with TAE 125-02-99 / -114
AMM-20-02
Chapter:
Issue:
Issue Date:
Page:
Content:
20-AMM-71-02
3
06.11.2013
20
46
Rev. No:
Rev. Date:
1
25.08.2014
Table 71-13a Troubleshooting / Induction / Exhaust System
Code
Indication
Code
Task / Check
Check by
Corrective Action
30
Lack of
manifold
pressure
30.1
Inspect induction
system for leaks
Inspect MP lines to FADEC,
inspect all hoses, connections.
Pressurize induction system
to 2.5 bar, while closing turbo
intake and rotating engine so all
valves are closed if necessary. Do
not disassemble system if no leak
has been found.
Repair hoses, connection as
necessary.
30.2
Check waste gate
adjustment
Connect FADEC Service Tool.
Waste gate duty cycle must be
65-88% at sea level conditions
and max. power.
Check and adjust waste gate
according to Repair Manual.
30.3
Inspect pneumatic
waste gate control
hoses
If hoses have been worked on,
check for correct routing /
connection.
Install correctly, repair as
necessary.
30.4
Inspect wiring harness
for damage or
penetration
Replace damaged / penetrated
harness
30.5
Measure waste gate
control signal
Refer to instructions for
measuring actuator control signal
30.6
Verify waste gate
control valve function
Replace waste gate control valve
31
Smut build-up
around
exhaust
manifold
31.1
Some smut build-up is
normal
Check for cracked manifold.
Check for distinct single cylinder
combustion noise during cold
engine start-up.
Replace exhaust manifold and
gasket if necessary
Induction / Exhaust System
Summary of Contents for Cessna 172
Page 8: ......
