Lycoming TEO-540-A1A Installation And Operation Manual page 87

TEO-540-A1A Engine Installation and Operation Manual
(7) All cylinders operate correctly when only the primary sparks are enabled and the
fueling is set to a specified air-fuel ratio
(8) All cylinders operate correctly when only the secondary spark is enabled and the
fueling is set to a specified air-fuel ratio
B. The EECS enables and disables each pre-flight test in sequence through calibration. The
EECS continues the pre-flight test to completion even if the expected system response
does not occur.
NOTICE: Allow sufficient time for the pre-flight test to complete (as shown by the PFT
annunciator) before making any power control changes. Otherwise the pre-flight
test could be inadvertently cancelled with no other indication that the check is
incomplete.
C. If the PFT annunciator:
(1) Never came on, the pre-flight test did not run.
(2) Blinks, the pre-flight test was aborted. Press the PFT button momentarily to
acknowledge that the check was not completed. After an aborted start PFT, wait 5
seconds after re-establishing correct engine speed and ensure average CHT is
within limits before pressing the PFT button again.
D. Once the pre-flight test starts, it will abort if any of the following occur:
• Power control changes more than ± 5% from where it was at the start of the sequence
• Engine speed goes below 1000 rpm
• Engine speed goes above 2300 rpm
• Engine load goes below 15%
• Average CHT goes below 140º (60ºC)
• Average CHT goes above 425ºF (218ºC)
• If the PFT button is pressed while the pre-flight test is running.
6. During pre-flight test, monitor the following:
• Ignition Check - engine speed will dip twice as each half of the redundant ignition system
is disabled and then re-enabled, deactivating half of the spark plugs during each check
• Primary Fuel Injector Test - engine speed will decrease slightly and then recover
• Primary Turbocharger Test - manifold pressure will briefly increase slightly
• Primary Propeller Control Cycle - the propeller will briefly operate in a cycle to coarse
pitch and decrease the rpm, then go back to fine pitch
• Secondary Fuel Injector Test - engine speed will decrease slightly and then recover
• Secondary Turbocharger Test - manifold pressure will briefly increase slightly
• Secondary Propeller Control Cycle - the propeller will briefly operate in a cycle to
coarse pitch and decrease the rpm, then go back to fine pitch
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October 2018
Engine Operation
Page 65