NATOPS Lists Flashcards
Primary Missions
SUW
ASW
EW
CC
NCO
Secondary Missions
AMW
AW
HS
FS-O
INT
LOG
NSW
30% of airflow is used for combustion, the rest is used for:
Inlet temperature (T2)
Discharge pressure (P3)
Combustion and turbine cooling
Oil seal pressurization
Fuel is tapped off of the HMU for:
Metering valve
Variable geometry vane servo
Amplify T2, P3, Ng signals
PAS sets max available Ng for:
Fail safe to high power
Power available with OEI
Functions of the HMU
Rapid engine transient response through collective compensation
Auto fuel scheduling for start
Ng overspeed protection at 110 +- 2
Flameout and compressor stall protection
Acceleration limiting
Ng governing
Functions of the ODV
Trap fuel upstream so priming isn’t required
Return fuel back to HMU in Np overspeed or hot start
Injectors - provide fuel to 12 injectors
Purge fuel overboard after shutdown to prevent coking of injectors
EDECU Functions
Np governing
Np overspeed protection
Np overspeed test
Ng decay rate relight
Contingency Power (auto, man, dual)
Hot start prevention
Engine speed trim
Fault diagnostics
TDI
Auto ignition
Signals
TGT limiting
Engine load sharing
DECU lockout
Three ways to anti-ice the engine
Vent bleed air into engine swirl vanes and IGV
Vent bleed air into airframe engine inlet
Pump hot oil through scroll vanes
Three ways to determine a malfunctioning anti-ice/start valve
Appearance of ANTI-ICE on outside of the ranges in the associated chart
No appearance of anti-ice on when switch is on
No rise in TGT when anti-ice is on
Three pigs
Backup hydraulic pump (No. 1 AC Pri)
Mission avionics system (No. 1 AC Secondary (TR DE-ICE also)
Main rotor de-ice (AC Monitor)
GCU Protection
Over voltage, under voltage, feeder faults, under frequency
Battery Analyzer/Conditioner Functions
Fault conditions, battery charge, internal temperature, cell conditions, battery charging capability
4 Reasons for Auto Backup Hyd Pump
1 HYD PUMP
#2 HYD PUMP
#1 RSVR LOW
#1 TAIL ROTOR SERVO
5 things required for a Hyd Leak Test
W - WOW
A - AC Power
A - Backup Hyd pump in AUTO
A - All reservoirs full
R - Rotors engaged
Hyd Leak Test Lights
1 RSVR LOW
#2 RSVR LOW
BACK UP RSVR LOW
SAS
BOOST
AFCS DEGRADED
#1 TAIL ROTOR SERVO
#2 TAIL ROTOR SERVO ON
BACK UP PUMP ON
MASTER CAUTION
Functions of the AFCS System
5 holds - Airspeed, RADALT, BARALT, pitch and roll attitude, heading
4 hovers (plus auto depart) - auto approach, coupled hover, cable angle hover, crew hover, auto depart
3 stabs - stability augmentation, stabilator control, maneuvering stability
Blade fold
Auto preflight check
Diagnostics
Turn coordination
Gust alleviation/hover augmentation
Trim
Mixing Unit Functions
Collective to Yaw
Collective to Lateral
Collective to Longitudinal
Yaw to Longitudinal
Collective/airspeed to yaw
4 inputs to the Stab
Collective position
Lateral acceleration
Airspeed
Pitch rate
Requirements for Cable Angle Hover
Ground speed less than 5 knots
RADALT within 10 feet
AFCS Degraded not illuminated
AUTO PLT engaged
Dome wet
DPRT or crew hover not engaged
5 things required for Automatic Preflight Checks
Both EGIs
Rotor brake on
Engine torques below 10%
WOW
SAS 1 engaged
In what order does ALL STORES JETT work
Sonobuoys
LIB
RIB
LOB
ROB
INOP WITH A COMPLETE ELECTRICAL FAILURE
Automatic ADHEELS Activation
Fresh or saltwater immersion
Impact of 11-13 Gs or greater
Attitude changes of 100+-5 or greater in pitch or roll
IHEELS Automatic Activation
Fresh or saltwater immersion
Attitude changes of 100+-5 in pitch or roll
What are the four operational restrictions for JP-4/JET B?
All takeoffs shall stabilize in a hover with no fuel px cautions for a minimum of 10 seconds
Single engine training is prohibited
Operating characteristics may change
Next two refuelings shall be treated as if JP-4/JET B is still present
Primary Fuels
JP-5
JP-8
F-24
TS-1
Restricted Fuels
JET A
JET A1
JET B
JP-4
Emergency Fuels
JP8+100
F-27
Five reasons to abort start
Ng doesn’t reach 14% within 6 sec
No oil px within 30 seconds of starter initiation
No light off within 30 seconds of IDLE
ENG STARTER dropout before 52% Ng
TGT likely to exceed 851 before idle speed attained
Four Types of Approaches to a Ship
Visual
Instrument
ELVA
Offset or Ordnance Approach
Cable Angle Hover Corrective Action Techniques
Cyclic 4-way trim
Fly against lateral trim
Using trim release, reposition the aircraft
Fly against longitudinal trim
Five Rescue/Recovery Methods
Landing to effect a rescue
Rescue via one or two wheels
Rescue via hoist
Rappelling
Direct deployment
How to get out of retreating blade stall
Severity of maneuever - decrease
Collective pitch - decrease
Airspeed - decrease
Altitude - decrease
Rotor RPM - increase
Gross Weight - decrease
LTE Effects
AOA Reduction - 060-120
Weather Vaning - 120-240
TR VRS - 210-330
ME Disc Vortex - 280-330
Vortex Ring State Requirements
Rate of descent > 700 fpm
0-20 KIAS
Worse at > 1500 fpm
5-10 KIAS
Recovery from VRS
Decrease collective pitch
Increase airspeed
Enter autorotation if altitude permits
Five thing that should be performed for all aircraft emergencies (MADCD)
Maintain aircraft control.
Alert crew.
Determine precise nature of the problem.
Complete the applicable emergency procedure or take action appropriate for the problem.
Determine landing criteria and land as required.
High Side Failure Conditions
TRQ is 10% or greater then other engine
Ng is 5% or greater than other engine
Np is matched within 5%
Nr is at or above 103%
Low Side Failure Conditions
TRQ is 10% below the good engine
Ng is 5% or less than good engine
Np is at or below 98%
Nr is at or below 97%
High Speed Shaft Failure Conditions
Np is greater than Nr by more than 3%
Engine TRQ is less than 10%
Indications of Main Trans Imminent Failure
Yaw attitude excursions with no control input
Increased power required for a fixed collective setting
Failure of main gen or hyd pump
Increased noise
Increased vibrations
Abnormal fumes
Indications of Tail/Int Gearbox Imminent Failure
Strong medium frequency vibrations
Hot metal fumes
Any other associated indication
Three Types of Tail Rotor Malfunctions
Control cable failure
Servo failure
Restricted flight controls
With the stab in manual mode, the following are not recommended:
Swimmer deployments lower than 15’
Night takeoffs, approaches, landings (except one time landing following failure)
Automatic approaches to a hover
Simulated EPs
Flight in known IMC
Three things to be performed for every sonar emergency
Alert crew.
Execute Reeling Machine Malfunction EP.
Complete the Sonar Troubleshooting Checklist.
Five Sections of the Engine
Inlet, Compressor, Combustor, Turbine, Exhaust
Flow of Air through Engine
Inlet cowling, inlet fairing, swirl vanes, IPS, collection scroll (dumped overboard by blower assembly), scroll vanes, de swirl vanes, compressor.
What does the Ng turbine drive?
Compressor
AGB
What do you lose and retain in LOCKOUT?
Lose: TGT limiting, load sharing, Np governing.
Retain: Np overspeed.
Two functions of the engine driven fuel boost pump
Provide reliable suction feed from fuel tank to the engine
Provide discharge px to satisfy minimum inlet px of HMU
Three control parameters of EDECU
Np sensing
Np overspeed and torque sensing
TGT monitoring
Inputs the EDECU Receives
ENG SPEED TRIM
CONT PWR
ENG OVERSPEED A AND B
EDECU sends these signals to cockpit
TRQ
Np
TGT
CONT PWR
What three things get power from the alternator?
AC power to igniter assembly, EDECU, and Ng signal to VIDS
Three factors that must be present to enter into Ground Resonance
- Total loss of hydraulic pressure to the main rotor damper system
- Lateral disturbance of main rotor head on deck or upon landing
- Convergence of fuselage roll frequency and main rotor lag frequency
When de-ice manual mode should be used?
- The pilot has determined by judgement of icing intensity that the icing rate system is inaccurate.
- Torque required has increased to an unacceptable level.
- Helicopter vibration has increased to an unacceptable level.
What are the assumptions when calculating FlyAway Torque?
1.5 sec reaction time from first torque split
C-Power on
70ft AGL min hover
Nr maintained between 96-100%
Satisfactory Maneuver execution
