FADEC 2019 Flashcards
What are the six functions of the FADEC?
- Starting
- Speed control
- Automatic backup control
- Overspeed protection
- System monitoring
- Fault management
FADEC 2019
Describe the FADEC overspeed protection feature?
DECU activates the Stop Valve through the BIM when the engine reaches 429RPM +/-4
FADEC 2019
What are the reason that an engine status light might illuminate?
- Oil pressure < 25 PSI
- Major FADEC fail
FADEC 2019
What does the ADU probe do?
VEMD OAT
FADEC 2019
Describe the OEI-GOV mode.
Comes on anytime N1>40%, N1 difference is > 6%, and either engine is in an idle or off state
FADEC 2019
When are the 4 times that OEI will default to HI?
- Major FADEC failure
- BACKUP mode selected on one engine
- N1 difference between the two engines is >6%
- There is an engine failure
FADEC 2019
When are the 2 times that OEI default to LO?
- TRNG switch is in IDLE
- either engine is degraded
FADEC 2019
What is the function of the DECUs? Locate them on your preflight.
Control Electronic Fuel Flow Governing
FADEC 2019
The engine idles at ___% N1.
68
FADEC 2019
FADEC attempts to match _____ for both engines.
N1
FADEC 2019
When will the DIF N1 light illuminate?
6%
FADEC 2019
What are the functions of the N2 controller?
- NR-Hi
- Variable NR
FADEC 2019
When torque limited, what are the AEO FADEC stops
- 110%
- 118% when NR decreases to <335 RPM
- 125% NR<317 or dropping faster then 2 RPM/sec and NR<324 RPM
FADEC 2019
When torque limited, what are the AEO FADEC stops
- 110%
- 118% when NR decreases to <335 RPM
- 125% NR<317 or dropping faster then 2 RPM/sec and NR<324 RPM
FADEC 2019
Describe the 3 levels of FADEC failures.
- Level 1 = Loss of redundancy
- Level 2 = Loss of non redundant resource
- Level 3 = Represent a total failure of the respective FADEC
FADEC 2019
