NATOPS Flashcards
1
Q
When may the APU be used?
A
EPs
Single Engine Training
Practice Autos
Powering ECS during extreme temp operations
2
Q
What are the steps for every EP?
A
- Maintain control of the aircraft
- Alert Crew
- Determine the precise nature of the problem
- Complete the applicable emergency procedure or take action appropriate for the problem
- Determine landing criteria and land as required
3
Q
What functions does the HMU provide?
A
- Rapid engine transient response through collective compensation
- Auto fuel scheduling for engine start
- Ng Overspeed protection (Ng 110+/- 2)
- Flameout and compressor stall protection
- Acceleration limiting.
- Ng governing
4
Q
Functions of the ODV
A
- Provides fuel to the 12 fuel injectors
- Purges fuel overboard after engine shutdown to prevent coking of the injectors
- Traps fuel upstream in the fuel/oil heat exchanger to prevent the need for priming
- Returns fuel back to the HMU in event of Np overspeed
5
Q
What do you lose in EDECU lockout?
A
TGT Limiting
Np governing
Load Sharing
6
Q
What do you keep in EDECU lockout?
A
Np overspeed protection
7
Q
Signals sent from EDECU to the cockpit?
A
Torque
Np
TGT
CPWR
8
Q
Indications of malfunctioning anti-ice/start bleed valve:
A
- ENG ANTI-ICE ON advisory with >90 Ng or >94 Ng if OAT is >= 15C
- No ENG ANTI-ICE ON advisory when Ng <88
- No ENG ANTI-ICE ON advisory when ENG ANTI-ICE switch is ON
- No rise in TGT when ENG ANTI-ICE switch is ON
9
Q
With ENG ANTI-ICE ON, what is the max torque reduction?
A
Up to 18% per engine
10
Q
How does the INLET ANTI ICE bellow function?
A
1.<4C, valve is open and INLET ANTI-ICE ON advisory appears when inlet temp reaches 93C
2. 4C - 13C, Freon filled bellows begin closing, and should be closed be 13C
3. >13C, valve is closed and INLET ANTI-ICE ON advisory extinguishes when inlet cowling temp is <93C
11
Q
Indication of inlet anti ice malfunction and corresponding consequence?
A
INLET ANTI-ICE ON advisory when OAT >13C.
Up to 49% loss of torque with valves open
12
Q
3 little pigs of the electrical system
A
- B/U Hyd Pump (No.1 AC Pri)
- Mission avionics system (AC Secondary), as well as tail rotor deice
- Main rotor deice (AC Monitor)
13
Q
Primary Fuel
A
Authorized to use for continuous unrestricted ops
JP-5/8, F-24, TS-1
14
Q
Restricted Fuel
A
Imposes operational restrictions on the aircraft
A1, A, JP-4, B
15
Q
Emergency Fuel
A
May be used for a minimum time when no other fuel is available in case of emergency or operational necessity.
JP8+100, F27
16
Q
Minimum Equipment for Night Flight over water
A
LAWS (Low altitude warning system)
Altitude Hold
17
Q
Is the fuel dump system protected by WoW?
A
No, fuel can be dumped on deck.
18
Q
Minimum Fuel Dump Rate
A
800 lbs/min
19
Q
AFCS Inner Loop
A
Rate damping
Fast response, limited authority, operates without movement of the flight controls
20
Q
AFCS Outer Loop
A
Long term inputs
Trims flight controls
Full authority
Limited rate of 10 percent / sec
21
Q
Four inputs to position the stab
A
Collective position
Lateral acceleration
Airspeed
Pitch rate
22
Q
Criteria required for Hyd Leak Test
A
WoW
AC Power
Rotors Engaged
B/U Hyd Pump in AUTO
All Hyd reservoirs full
23
Q
Indications of degraded xmsn lubrication system
A
- Steady px outside of 45-60, but w/n 30-65
- Fluctuations not exceeding a range of 10 PSI, but w/n 30-65
24
Q
What defines a no flow oil condition?
A
0 xmsn oil px during rotor engagement. Limited to <1min and shall be documented on a MAF
25
Indications of imminent xmsn fail
Yaw attitude excursions with no control input
Increase in pwr req for fixed collective setting
Failure of main gen or hyd pump
Increased noise
Increased vibes
Abnormal fumes in caboin
26
How long does CABLE ANGLE hover take to calculate velocity biases?
25 seconds
27
Cable Angle Hover corrective actions
1. Cyclic trim (3kgs input)
2. Fly against lateral trim
3. Reposition aircraft using trim release button
4. Fly against longitudinal trim
28
Static Rollover
28 degrees
Parked on very steep embarkment
29
Critical Rollover
Max lateral angle of slope that can be negotiated in a takeoff or landing.
12 degrees with left wheel uphill and brakes on
30
Dynamic Rollover
Buildup of angular velocity of helicopter cg about a wheel ground contact point.
31
Minimum Equipment for Passengers
Helo emergency egress lighting system shall be operational for all overwater flights requiring passengers/non aircrew in the cabin
32
NATOPS Operational Necessity Items
Night HIFR
Night VERTREP
1 or 2 wheel rescues
33
At what Nr do the generators drop off?
With WoW: <94 Nr
In Flight: <=80 Nr
34
At what Nr will the generators reconnect?
97 Nr
35
What buses are powered by the number 1 gen?
No.1 AC Pri
AC Essential
AC Secondary
36
What buses are powered by the number 2 gen?
No. 2 AC Pri
AC Monitor
37
What does the batter power?
Utility Bus
38
At what battery percentage may the battery not activate the fire extinguisher CADs?
<30%
39
What is the hyd system pressurized to?
3000 psi
Trim actuators are powered to 1000 psi
40
What does the number 1 hyd system power?
1st stage pri servos
Tail Servo
41
What powers the hyd pumps?
Accessory module off of the transmission
42
What does the number 2 hyd system power?
2nd stage pri servo and PAS assembly
43
How long does it take the b/u hyd pump to energize?
4 sec on APU or external power
or
0.5 sec of main gen
44
When do antiflapping restraints come out?
35% Nr
45
When do droop stops come out?
70% Nr
46
When should droop stops be in by?
50% Nr
47
How much of the total lift does the tail rotor supply?
2.5%
48
Functions of the AFCS
SAS
Trim
Auto Pre Flight Check
Blade Fold
Stabilator
Diagnostics
Sonar Cable Angle Hover
Auto Approach to Hover
Depart (auto)
Maneuver Stability
Augmentation (Hover/Gust)
Turn Coordination
Crew Hover
Hover Coupler
5 hold:
Attitude Hold
Altitude Hold
Heading Hold
Baralt Hold
Radalt Hold
AFCC
49
When should starter dropout occur?
52-65 Ng
50
What are the modules in the transmission?
Input module
Accessory Module
51
What shall the donee engine in a crossbleed start prior to PCL to IDLE?
24 Ng
52
What does the Accessory Module do?
Drives the ac gen and hyd pump module
53
What does the input module do?
Supports the front of the engines
Contains a freewheeling unit
54
What does the freewheeling unit do?
Diseengages the engine from the transmission when Nr exceeds Np in an autorotation
55
When do you get the MAIN XMSN PRESS LOW caution?
<14 psi
56
When do you get the MAN XMSN OIL HOT caution?
117C
57
When is the Xmsn chip burnoff feature disabled?
Oil temp >140C
58
How long must ferrous material be on the xmsn chip detector prior to an alert?
30 seconds
59
How long does a CHIP IBIT take?
2 min
60
How long is 28 vdc interrupted on a chip IBIT?
40 sec
61
What is the system capacity of the main fuel tank?
4k lbs
62
When is the external fuel tank ALL STORE JETT inhibited?
When the external fuel tank is less than 272lbs
(Reads in 50lb increments so really 300lbs)
63
When does AUTO fuel xfer activate?
2640lbs
64
When does the FUEL LOW caution appear?
One of the fuel cells reaches 300lbs
Total fuel reaches <600lbs
65
How long must a fuel low condition be detected for a caution?
>5 seconds
Deactivated if not detected for 20seconds
66
How can the aircraft be refueled?
Gravity
Pressure
HIFR
67
What HIFR system do we use?
Wiggins quick disconnect
68
If there is an air bubble during refueling, when should fueling be stopped?
Before the right cell is full (1700lbs)
69
How much fuel does the APU use?
150 lbs/hr
70
What is minimum accumulator pressure required for starting the APU?
2650 psi
71
What does the GCU do?
Connects gen to the bus system
Regulates output
Protects system from overvoltage, undervoltage, feeder fault, underfrequency
72
When would you see the GEN cautions?
No supply to the buses
Generator is OFF
Failure of gen, GCU, contactor control relay
Wiring fault
73
At what charge does the battery not power the dc essential bus?
<35%
74
At what charge may the battery not power the fire extinguisher CAD?
<30%
75
At what charge will you see a BATTERY LOW CHARGE caution?
<40%
76
WoW b/u pump in OFF
Backup pump is off
77
WoW b/u pump in ON
Recirculates fluid to and from each module
Maintain pressure in the APU accumulator and rescue hoist systems
78
WoW b/u pump in AUTO
Maintains pressure in No.1 and No.2 systems, and 2nd stage tail rotor servo
79
Weight off wheels b/u pump in OFF or AUTO
Maintains hyd pressure in the No.1 and/or No.2 hyd systems
Maintains pressure in 2nd stage tail rotor servo
80
Weight off wheels b/u pump in ON
Recirculates hyd fluid to and from each module
Maintains pressure in the APU accumulator and rescue hoist
81
When does the hyd b/u pump automatically turn on?
Loss of No1 or No2 HYD PUMP
No.1 RSVR LOW
No1 TAIL RTR SERVO
82
What does the priority valve do?
Restricts hyd fluid to the rescue hoist if b/u pump pressure decreases
83
What does the velocity fuse do?
Secures fluid flow to the APU accumulator if flow rate exceeds a limit
84
What does the utility hyd system do?
Operates the sonar reeling machine
85
What is the utility hyd system pressurized to?
1000psi when deenergized
3000psi when energized
86
What position can the stab travel to?
42 up
10 down
87
What is stab travel restricted to upon failure?
35 if failed full down
30 if failed full up
88
What occurs if a SAS channel fails?
The remaining channel doubles its gain, but is still limited to +/-5 percent authority
89
Yaw trim disengagement @ >50kts
Pedal microswitches
Cyclic TRIM REL
90
Yaw trim disengagement @ <50kts
Pedal microswitches
91
When is the coordinated turn featured activated?
>50kts
92
Automatic approach to hover above profile, profile
360'/min descent
Airspeed hold
93
Automatic approach to hover be low profile, profile
2.5kt/sec decel
rad alt hold
94
Automatic approach to hover on profile >40kt, profile
2.5kt/sec decel
215'/min descent
95
Automatic approach to hover on profile <40kt profile, profile
1.5kt/sec decel
130'/min descent
96
What profile will automatic depart put you in?
150', 120kts
97
When does hover coupler engage?
Within 1kt and 2'
98
When is the hot scale main transmission dip stick used?
30 min - 2 hr
99
When is the cold scale main transmission dip stick used?
>2hrs after shutdown
100
When is VRS measurable?
700 fpm descent
0 - 20 kts
101
When is VRS worst?
1500 fpm descent
102
3 Tail Rotor Control Malfunction Categories
Tail Rotor Control Cable Failures
Tail Rotor Servo Failures
Restricted Flight Controls
103
Best speed Tail Rotor Control Fail
AT 25 and 145 with helo at 19500lbs
104
Best Speed Tail Rotor Servo Failure
Between 40 and 120
105
Best landing for tail rotor servo failure
Rolling landing above 40kts
106
Loss of tail rotor control best landing
Rolling landing above 40kts
107
Edecu functions
Np Gov
Np Overspeed Protection
Np Overspeed Test
Ng Decay Rate Relight
Cockpit Signals
Hot start prevention
EDECU Lockout
Transient Droop Improvement
Auto Ignition System
CPWR
TGT Limiting
Eng Load Sharing
Eng speed trim
108
AFCS Functions
Sas
Trim
Autopreflight
Blade fold
Stab auto control
Diagnostics
Sonar cable angle
Auto App to Hover
Depart, auto
Maneuvering stability
Augmentation (pitch/roll/gust)
Turn cord
Crew hover
Hover coupler
Airspeed hold
Hdg hold
BarAlt hold
Attitude hold
Radalt hold
109
Generator numbers
35kVa
115Ac
400hz
3 phase
110
Dc power supply rating
24 vdc
111
Max comm nav range
Ground - 120
Air - 300
112
Aux fuel tank capacity
120 or 113 gal
113
Primary Missions
SUW
ASW
EW
Command and Control
Non Combat Ops
114
Secondary Missions
Fleet Support Ops (SAR)
Intel Ops (ISR)
Logistics (Vertrep)
Navy Spec Ops
Health Services (Medevac)
Air Warfare (LSF)
Amphib Warfare (NSFS)
