Supplement Airplane Maintenance Manual
Cessna 172 with TAE 125-02-99 / -114
AMM-20-02
Chapter:
Issue:
Issue Date:
Page:
Content:
20-AMM-61-02
3
06.11.2013
4
6
Rev. No:
Rev. Date:
1
25.08.2014
TROUBLESHOOTING
Table 61-1a Troubleshooting Propeller
Trouble
Cause
Corrective Action
check oil level at oil viewer
glass at front side of the
gear box
fill up gear box oil (see
OM-02-02)
check, when micro filter
has been changed last
time (every 50 operating
hours)
authorised maintenance
will change the microfilter
change gear box oil
broken connection
between FADEC and
pressure control valve
check electrical
connection to pressure
control valve
incorrect function of the
pid-regulator
contact authorised
maintenance or engine
manufacturer
dirty gear box oil
Contaminants in dirty gear
box oil can cause
blockage of close
tolerance passages in the
CSU, leading to erratic
operation. Timely gear box
oil changes should
eliminate this problem
low level of gear box oil
high contamination of
micro filter
Propeller surging or
"wandering"
Summary of Contents for Cessna 172
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