DAY 9: Dash 1 Section 1 (Oil, Fuel, Electrical)

How much shaft horsepower does the T-6 engine produce?

1100 pounds shaft horsepower (SHP)

What is the capacity of the oil system?

18.5 quarts

What 4 main subsystems comprise the oil system?

Pressure, scavenge, cooling, and breather

How soon after engine shutdown must the oil level be serviced? When is it recommended you check the oil for most accurate results?

30 minutes, 15 to 20 minutes

The engine oil pressure system may display oil pressures up to ___ psi with the engine shut down.

4 psi

The EDM passes oil pressure data to what computer that contains the logic to illuminate CWS annunciators?

Signal Conditioning Unit (SCU)

What indicates an SCU failure?

Illumination of both red and amber OIL PX annunciator while the oil pressure gage indicates normal pressure

Where is the chip detector located?

In the reduction gearbox

Because the engine is flat rated, 100% torque is available up to what altitude range on a standard day?

Sea level to 12,00 - 16,000 feet MSL

What computer controls the propeller pitch and how does it do it?

The Propeller Interface Unit (PIU). It varies the amount of oil pressure sent to the propeller

What RPM does the propeller normally operate at?

2000 RPM

With the PMU functioning, the mechanical overspeed governor limits Np below ____%

106%

The electronic governor will maintain Np at ____% with the PMU functioning.

100%

How does the propeller change pitch?

PMU controls the RPM by varying the blade angle with oil pressure through the PIU

With the PROP SYS circuit breaker pulled, what will happen if the engine is shut down?

The prop will not rapidly feather and may not fully feather until after landing

How many volts AC does the PMA supply?

32 VAC

The PMU switches to the battery bus when the propeller RPM drops below what Np?

When it drops below 40-50% Np

How long will the ST READY annunciator remain illuminated activated even if the PCL is moved out of the auto start position?

3 seconds

At approximately what percent N1 does the PMU deactivate the igniters and boost pump (if fuel px is above 10 PSI)?

50%

If issues with the PMU not serious enough to revert the system to manual are encountered in flight, the PMU STATUS light will illuminate how many minutes after landing?

1 minute

What does a PMU STATUS light in flight indicate?

A fault in either of the weight-on-wheel switches. N1 will not shift from flight idle to ground idle upon landing and landing distance may be slightly longer than normal.

True/False: Flattening, twisting, kinking or denting of the fire warning loop will not affect test or flight operations

True

True/False :The firewall shutoff handle can only be reset by maintenance after being pulled.

False

Which buses are FIRE 1 and FIRE 2 located on?

FIRE 1: Battery Bus

FIRE 2: Generator Bus

What are the six annunciators relating to fuel systems?

Red FUEL PX

Amber FUEL BAL

Amber L/R FUEL LO

Green M FUEL BAL

Green BOOST PUMP

What are the volts/amps of the starter/generator?

28 VDC, 300 amps

What are the volts/amps of the main battery?

24 VDC, 42 amp-hours

What are the volts/amps of the auxiliary battery?

24 VDC, 5 amp-hours

What is the only item automatically shed when the GEN annunciator illuminates?

The Air Conditioning

What is on the auxiliary battery bus?

Standby instruments

Lighting for the standby instruments

UHF transceiver and backup UHF control

FIRE 1 fire warning system

What items are on the hot battery bus?

Battery Switch

ELT

FDR MAINT

OBOGS

RAM Air Valve

Emergency Flaps

Clocks

Do not connect external power if battery voltage is below ___ volts.

22.0 volts

Expect a minimum of ___ minutes of battery power to the battery bus items with the bus tie open.

30 minutes