Powerplant Flashcards
Whats the minimum oil pressure? What oil pressure triggers a RWP Oil PRS light?
- 36 psi minimum.
- less than 20 will trigger a RWP and Triple Chime.
What are the minimum oil temps for takeoff?
16 degrees per AFM.
21 degrees recommended.
26 degrees KLA SOP.
What overrides FADEC on the overhead panel?
Continuous Ignition.
When is ignition provided?
5.2% to 40% N2.
Whats the minimum N2 for a windmilling air start?
9%
When will FADEC automatically shut down an engine?
ITT over 1,000 C (hot start).
ITT
What happens when you move the thrust levers to idle?
- FADEC creates a ‘false overspeed’.
2. Wire triggers motor that moves fuel shutoff valve.
How do we reset FADEC?
thrust levers to cutoff
What are the three parts of FADEC?
- EEC (electronic engine control)
- HMU (hydromechanical unit)
- TLA (thrust lever angle)
During engine start, when does auto ignition occur?
When N2 reaches 5.2% and continues until 40% N2.
What type of engine do we have?
PW306B
What drives the fan?
The inner shaft.
What is the Compressor Section comprised of?
4 Axial Stages.
1 Centrifugal Stage.
Do all 24 fuel nozzles provide fuel during start?
Two of them are “HYBRID NOZZLES” which atomize fuel at a lower pressure.
These two are the only two that provide fuel during start.
Whats the minimum amount of air pressure for a pressure start?
12 PSI opens the ATS (air turbine start valve).
20 PSI is minimum recommended for a good start.
