OIL SYSTEM
How do you reset the oil filter bypass indicator?
Remove and invert the filter bowl while depressing the indicator.
How many stages of variable vanes are their in the HP Compressor?
What component provides engine specific EPR and TGT trimming
Data Entry Plug
How many main fuel filters are installed on the BR710 engine?
2 (1 HP and 1 LP filter)
Which gas path does the thrust reverser redirect when deployed?
Hot stream and cold stream gas paths.
How many scavenge pumps are there and what type of pumps are they
4 vane type pumps
What kind of alloy are stages 7 thru 10 made of?
Nickel Alloy
How many pressure ports are located on the EEC and what are they?
4 P0, P20, P30 and P50
What component within the FMU controls VSV Actuator?
The EHSV (Electro Hydraulic Servo Valve)
What component provides thrust reverser door angular position feedback to the EEC?
LVT's
What kind of cooler is used to cool the VFG's?
SACOC Surface Air Cooled Oil Cooler
What 2 features help identify the #1 blade position on the fan blade retaining ring?
Yellow paint and a guide pin.
What health level do both EEC channels have to be before the engine is commanded to shut down?
Health level 3
What component within the FMU do the IOP's interface with to shut the engine down in an overspeed situation
COSS (Combined OverSpeed and Shutoff Solenoid)
What engine parameter is thrust being controlled by while the thrust reverser is deployed
N1
How many oil pressure transducer(s) are installed on the engine and what pressure(s) are measured?
Two / Pressure Pump Outlet and RBC Scavenge Pressure
What is the RPM of the HP Compressor at 100% speed?
15898 RPM
What are the three main components that make up each EEC channel?
PSU, CPU and IOP
How many sensors are installed on the FCOC and what are they?
2 LP Temperature Sensor and LP Filter Differential Pressure Sensor
What safety precautions must be taken when performing maintenance on or around the thrust reverser?
Thrust levers at idle and tagged do not operate. Pull circuit breakers. ICU Manual Inhibit Lever in the deactivate position