Phase 1 DQ’s Flashcards
What are the definitions of warnings, cautions and notes in the operators manual?
Warnings- potential loss of life or injury
Cautions-damage to aircraft systems or equipment
Notes- something essential to highlight or emphasize
Where does the APU get its fuel?
Left main fuel tank
Where is the APU DESU and what does it do?
Left side aft cabin/ramp area
Monitors APU start and operation
What is the difference between angle of incidence and angle of attack?
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)
How is dissymmetry of lift compensated for in a fully articulated rotor system?
Lead, lag, flap, and feathering
During run up, prior to engine start, how are the flight control hydraulics pressurized?
Utility power system (pressurized by APU motor pump) provides pressure to flight control hydraulics through the PTU’s (power transfer units)
Below what altitude will the engine driven fuel pump draw fuel from the main tanks if both main pumps fail?
Below 6,000’ PA
Explain GO/NO GO torque
Predictors during hover power checks that predict the ability/capability to attempt OGE maneuvers
Explain validation factors
Verifies GWT and TQ factors and indicates an exceedance of MAX GWT for mission profile
How long is the aircraft from AFT + FWD rotor tip with rotors turning?
98 feet 10.7 inches
At what fuel quantity will the L FUEL LVL or R FUEL LVL be displayed on the WCA page?
Approximately 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)
-10, pg. 2-53
Under what conditions will the XFEED FUEL VALVE WARNING LIGHTS illuminate?
- normal operation
- short circuit
- valve protection relay fail
Where can you find the list of useable fuels that may be used in a CH47?
Chapter 2 in the operators manual
Define ground resonance
A self energizing condition in which the rotor blades become unbalanced due to improperly serviced parts or alternating wheel strikes upon landing, etc.
Describe where the ground proximity switches are and how they enhance ground handling
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%
What is the caution associated with the WOW switches?
If the landing lights remain on upon take off, the DASH will not function properly and LCTs may remain in GND
What is the corrective action for ground resonance in a CH47?
Immediate take off
How will the WOW switches be affected during a water landing or upslope landing?
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
What are the ground speed based “Velocity Stabilized” modes?
TRC-Translational Rate Command
PH-Position Hold
What are the design features of the aircraft that enhance DAFCS OFF flight?
Spoilers on FWD pylons
Blunted AFT pylon
Strakes on fuel pods and ramp
Identify the different types of drag
Parasitic, profile, induced, total
In the event of IIMC, on what frequency should you attempt to contact ATC?
121.5 or 243.00
guard
What initial response steps are carried out during an emergency?
Establishing aircraft control, alerting the crew and starting the FADEC-F process.
What is the single most important consideration during an emergency?
Aircraft control
Define retreating blade stall and its effect on tandem rotor helicopters
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.
What five conditions lead to retreating blade stall?
Turbulent air high GWT high DA high G maneuvers low NR
How do you recover from retreating blade stall?
Decrease airspeed and decrease altitude if able and increase rotor speed if able
What are the indications of an ENG FAIL?
- 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
When does ENG 1/2 FAIL warning activate?
- 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
Discuss considerations for TCL inputs after a single engine failure at a hover
<20’ TCL should be maintained in position
>20’ TCL should be lowered to maintain at least 96% NR
Discuss considerations for cyclic inputs during an engine failure at a hover
Low hover- maintain hover attitude
High hover-establish a landing attitude
What airspeed should be maintained after a single engine failure in flight?
Calculated best single engine airspeed for planned conditions, an airspeed not to exceed limitations based on PPC
If both generators fail in flight what is the only source of electrical power available?
On board Battery
When do the FLT CONTR Pressure cautions become active and inactive?
Active-below 1,800 psi
Inactive- approaching 2,300 psi
-10, pg. 2-80
What items may be affected/isolated in the event of a utility hydraulic system failure?
Power steering Brakes Swivel locks Ramp Center cargo hook Winch PTU’s
What type of approach should you make if both LCTs fail in the extended position?
Set brakes, shallow approach to a hover/touchdown with no forward movement
Should a thrust CCDA fail while VMC what should be done with the AFCS switch?
OFF then BOTH after reducing airspeed
When a MFD FAIL advisory activates what should be done with the selector knob on the MFD?
what is the associated caution?
OFF then NORM
uncouple from FD and DAFCS modes to prevent any unforeseen inputs
What airspeed should you adjust to if one EGI fails?
<100KCAS or VNE
If both EGIs fail, what is the primary instrument used for attitude and reference heading in flight?
SFD’s
Explain the caution and note associated with emergency descents
- 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
What conditions must be present for settling with power to occur?
- vertical or near vertical descent >300 fpm
- downwind approach (tailwind)
- below ETL
- 20-100% of TQ applied
In a CH47, what are the corrective actions if experiencing settling with power?
Lower thrust (altitude permitting) and apply lateral cyclic to escape downwash
