Precision Simulator update 10.167 (12 March 2023) is now available.
Navburo update 13 (23 November 2022) is now available.
NG FMC and More is released.
Quote from: ASCTU744 on Thu, 30 Mar 2023 10:41So only a loss of PT2 (ADC) results in a change of reversionary mode. When the TAT data is lost, the ECU uses T12.
When PT2 is lost and the transition occurs, the ECU chooses not to use T12 data. But instead the last valid ADC data is used. (Why?)
Quote from: Hardy Heinlin on Thu, 30 Mar 2023 11:46"The normal control mode is used if PT2 LADC and PT2 RADC are both available and valid, and agree within 0.437 psia. Probe heat must also be ON. If these conditions are not met, the EEC automatically enters a soft reversionary control mode."
Despite the agreement check, this text says that the soft reversionary mode even occurs when just either PT2 alone is unavailable.
QuoteIf an input signal is determined to be faulty or missing, the
EEC is generally able to use the input from the opposite [EEC]channel.
QuoteADC - TAT, P (AMBIENT).. USE ENGINE SENSORS
ADC - PT2............... SWITCH TO REVERSIONARY MODE
T12, P0................. USE CROSS CHANNEL DATA. IF BOTH SENSORS FAIL, USE LAST KNOWN DATA
N1, N2, P3, T25......... USE CROSS CHANNEL DATA. IF SENSORS DISAGREE, USE CLOSEST TO CALCULATED VALUE. BOTH SENSORS FAIL, USE CALCULATED VALUE
QuoteLOSS OF BOTH EEC CHANNELS: DRIVERS (EHSV, SOLENOID)... SWITCH TO FAILSAFE FOR ALL FUNCTIONS, EHSV TO NULL BIAS, ENGINE SHUTDOWN