Phase 1 DQ’s

Question 1

What are the definitions of warnings, cautions and notes in the operators manual?

Answer 1

Warnings- potential loss of life or injury

Cautions-damage to aircraft systems or equipment

Notes- something essential to highlight or emphasize

Question 2

Where does the APU get its fuel?

Answer 2

Left main fuel tank

Question 3

Where is the APU DESU and what does it do?

Answer 3

Left side aft cabin/ramp area

Monitors APU start and operation

Question 4

What is the difference between angle of incidence and angle of attack?

Answer 4

Angle of incidence- angle between the chord line and rotational relative wind

Angle of attack-angle between the chord line and the resultant relative wind (factors in induced flow)

Question 5

How is dissymmetry of lift compensated for in a fully articulated rotor system?

Answer 5

Lead, lag, flap, and feathering

Question 6

During run up, prior to engine start, how are the flight control hydraulics pressurized?

Answer 6

Utility power system (pressurized by APU motor pump) provides pressure to flight control hydraulics through the PTU’s (power transfer units)

Question 7

Below what altitude will the engine driven fuel pump draw fuel from the main tanks if both main pumps fail?

Answer 7

Below 6,000’ PA

Question 8

Explain GO/NO GO torque

Answer 8

Predictors during hover power checks that predict the ability/capability to attempt OGE maneuvers

Question 9

Explain validation factors

Answer 9

Verifies GWT and TQ factors and indicates an exceedance of MAX GWT for mission profile

Question 10

How long is the aircraft from AFT + FWD rotor tip with rotors turning?

Answer 10

98 feet 10.7 inches

Question 11

At what fuel quantity will the L FUEL LVL or R FUEL LVL be displayed on the WCA page?

Answer 11

320-420 lbs (main tanks fuel lvl sensors)

-or-

Either main fuel tank quantity is less than 360 lbs for more than 2 seconds (when sensors fail and reported by CAAS)

Question 12

Under what conditions will the XFEED FUEL VALVE WARNING LIGHTS illuminate?

Answer 12

-normal operation
-short circuit
-valve protection relay fail

Question 13

Where can you find the list of useable fuels that may be used in a CH47?

Answer 13

Chapter 2 in the operators manual

Question 14

Define ground resonance

Answer 14

A self energizing condition in which the rotor blades become unbalanced due to improperly serviced parts or alternating wheel strikes upon landing, etc.

Question 15

Describe where the ground proximity switches are and how they enhance ground handling

Answer 15

On both aft landing gear, they drive the LCT’s to “Ground” which tilts the rotor system to aid in taxiing and reduces pitch axis gain by 50%

Question 16

What is the caution associated with the WOW switches?

Answer 16

If the landing lights remain on upon take off, the DASH will not function properly and LCTs may remain in GND

Question 17

What is the corrective action for ground resonance in a CH47?

Answer 17

Immediate take off

Question 18

How will the WOW switches be affected during a water landing or upslope landing?

Answer 18

They won’t turn on: LCT’s won’t be driven to ground and pitch axis gain won’t be reduced, LCTs will need to be manually actuated to GND

Question 19

What are the ground speed based “Velocity Stabilized” modes?

Answer 19

TRC-Translational Rate Command

PH-Position Hold

Question 20

What are the design features of the aircraft that enhance DAFCS OFF flight?

Answer 20

Spoilers on FWD pylons
Blunted AFT pylon
Strakes on fuel pods and ramp

Question 21

Identify the different types of drag

Answer 21

Parasitic, profile, induced, total

Question 22

In the event of IIMC, on what frequency should you attempt to contact ATC?

Answer 22

121.5 or 243.00

Question 23

What initial response steps are carried out during an emergency?

Answer 23

Establishing aircraft control, alerting the crew and starting the FADEC-F process.

Question 24

What is the single most important consideration during an emergency?

Answer 24

Aircraft control

Question 25

Define retreating blade stall and its effect on tandem rotor helicopters

Answer 25

Condition in which the zero lift portion of the retreating blade increases in span and cannot produce enough lift to sustain flight.
In tandem rotor helicopters retreating blade stall produces insignificant pitch variations, but will result in increased vibrations and probable loss of altitude.

Question 26

What five conditions lead to retreating blade stall?

Answer 26

Turbulent air
high GWT
high DA
high G maneuvers
low NR

Question 27

How do you recover from retreating blade stall?

Answer 27

Decrease airspeed and decrease altitude if able and increase rotor speed if able

Question 28

What are the indications of an ENG FAIL?

Answer 28

-ENG 1/2 FAIL on MFD

• decrease in NG and TQ on failed engine

-increase in NG and TQ on healthy engine

-possible decrease in NR and potential loss of altitude

Question 29

When does ENG 1/2 FAIL warning activate?

Answer 29

-NG <48%

-power turbine shaft failure (NP >3% of NR)

• Engine flameout

-Abort start or engine shutdown (only available with FADEC PRI)

• FADEC PRI and REV fail

Question 30

Discuss considerations for TCL inputs after a single engine failure at a hover

Answer 30

<20’ TCL should be maintained in position
>20’ TCL should be lowered to maintain at least 96% NR

Question 31

Discuss considerations for cyclic inputs during an engine failure at a hover

Answer 31

Low hover- maintain hover attitude
High hover-establish a landing attitude

Question 32

What airspeed should be maintained after a single engine failure in flight?

Answer 32

Calculated best single engine airspeed for planned conditions, an airspeed not to exceed limitations based on PPC

Question 33

If both generators fail in flight what is the only source of electrical power available?

Answer 33

On board Battery

Question 34

When do the FLT CONTR Pressure cautions become active and inactive?

Answer 34

Active-below 1,800 psi
Inactive- approaching 2,300 psi

Question 35

What items may be affected/isolated in the event of a utility hydraulic system failure?

Answer 35

Power steering
Brakes
Swivel locks
Ramp
Center cargo hook
Winch
PTU’s

Question 36

What type of approach should you make if both LCTs fail in the extended position?

Answer 36

Set brakes, shallow approach to a hover/touchdown with no forward movement

Question 37

Should a thrust CCDA fail while VMC what should be done with the AFCS switch?

Answer 37

OFF then BOTH after reducing airspeed

Question 38

When a MFD FAIL advisory activates what should be done with the selector knob on the MFD?
what is the associated caution?

Answer 38

OFF then NORM
uncouple from FD and DAFCS modes to prevent any unforeseen inputs

Question 39

What airspeed should you adjust to if one EGI fails?

Answer 39

<100KCAS or VNE

Question 40

If both EGIs fail, what is the primary instrument used for attitude and reference heading in flight?

Answer 40

SFD’s

Question 41

Explain the caution and note associated with emergency descents

Answer 41

-recovery must be initiated prior to 600’ AGL
-VSI will not accurately indicate true rate of descent
-higher NR will reduce the float effect experienced during recovery and deceleration

Question 42

What conditions must be present for settling with power to occur?

Answer 42

-vertical or near vertical descent >300 fpm
-downwind approach (tailwind)
-below ETL
-20-100% of TQ applied

Question 43

In a CH47, what are the corrective actions if experiencing settling with power?

Answer 43

Lower thrust (altitude permitting) and apply lateral cyclic to escape downwash