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Engine Condition
Annunciators (Cont.)
The NTO or TLO annunciator is
illuminated but can still make
rated power
(Indicates a component has failed
and has put the engine in a back-
up mode - any additional failure
can cause loss of power)
TLO annunciator illuminates
during flight
Annunciator fails
All annunciators fail
"PFT in Progress" indication is
cleared while the PFT is in
progress
Engine Operation
Engine roughness
Engine hesitates, misses
Low, high or surging rpm
Low or fluctuating oil pressure
Oil pressure falls below the
minimum level
High oil temperature
High oil pressure
Low or high fuel flow
Excessive manifold pressure
Engine Conditions
Page 70
TEO-540-A1A Engine Installation and Operation Manual
Table 1 (Cont.)
Action for Engine Conditions
Explanation/Corrective Action
Complete a safe landing and speak to Maintenance to
isolate faults.
The current flight can continue for up to 20 hours as long
as no other annunciators are illuminated and there are no
other engine problems. After landing, speak to
Maintenance to isolate faults.
Have Maintenance replace the annunciator as soon as is
practical.
Have Maintenance examine all annunciators and wiring
as soon as possible.
The PFT annunciator will flash as an indication that the
pre-flight test was not completed. The pilot must push
and then let go of the PFT button to clear this condition
and then re-start the pre-flight test.
Complete a safe landing and speak to Maintenance.
Complete a safe landing and speak to Maintenance.
Complete a safe landing and speak to Maintenance.
Complete a safe landing and speak to Maintenance, refer
to the section "Low Oil Pressure During Flight" in this
chapter.
Complete a safe landing. Refer to the section "Low Oil
Pressure During Flight" in this chapter.
Complete a safe landing and speak to Maintenance.
Before increasing the power control, allow the oil
temperature to increase.
Complete a safe landing and speak to Maintenance
Complete a safe landing and speak to Maintenance.
© 2018 Avco Corporation. All Rights Reserved
October 2018
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