RANDOM Questions Flashcards
What is mounted to the MWGB? What is driven by the MWGB?
(1,2,3, And 4; R-squared, O)
CFG1 (D), SDC (D), HYD3 (D), APU, VFG4 (D), RPU, Rotor Break,
Oil Cooler (D)
(D) = Driven by
Functions of the DRIVE SYS
- transmit torque form the engines to the proprotors
- provide synchronization of the proprotors & single engine operation of the proprotor sys
- POWER GENERATION FOR ELECTRICAL, PNEUMATIC, & HYDRAULIC POWER
PRGB components (4)
- Proprotor mast
- Integral lubrication sys
- Input Quill Assembly
- Breather Assembly
The LEFT TAGB drives the # ___ VFG and the # ___ HYD Pump
No. 3 VFG ; No. 1 HYD Pump
Drive sys components (9)
- PRGB
- ELS
- TAGB
- NACELLE HEAT EXCHANGER
- MWGB
- PYLON SUPPORT ASSEMBLY & CONVERSION SPINDLE
- ICDS
- ROTOR BREAK
- DSIU
INTERIM POWER: allows Nr up to ___% and Qm up to ___%
ARMED: ___KCAS, ___ deg Nacelles
ON: ___KCAS, ___ deg Nacelles
104%Nr ; 117%Qm
ARMED: >60KCAS, <70deg Necelles
ON: <55 KCAS, >70deg Nacelles
EAPS
AUTO mode: ON ___ kts / OFF ___ kts
Engine Air Particle Separator
ON <60kts / OFF >70kts
OIL CONDITIONING UNIT COMPONENTS
(at least the top/main 3)
Oil filter (3-micron)
Fuel oil heat exchange
Ail/oil separator (removes ~90% of air)
Oil Temp sensor
Debris Sensor
Oil Level sensor (bottom of oil tank)
Engine gulping - yellow region of oil level displayed as green for first 15mins of weight off wheels
FADEC will initiate an engine shutdown when: (6)
- ECL aft of START
- Ng/Np overspeed
- No light-off detection at engine start
- Failure to relight on flame-out detection
- Failure of second FADEC (dual FADEC incapable) & Ng speed <53%
- MGT >779C during a start
MAJOR ASSEMBLIES OF THE ENGINE
- TORQUEMETER ASSEMBLY
- GAS GENERATOR ASSEMBLY
- POWER TURBINE ASSEMBLY
- ACCESSORY DRIVE GEARBOX ASSEMBLY
To prevent thermal lockup, normal engine shutdown procedure includes a ___min cool down to a stable MGT less than ___C at flight idle or below.
BONUS: Describe thermal lockup.
2 mins ; 537C MGT
Thermal lockup is identified by an inability to turn the compressor rotor by hand, or to achieve an Ng increase when cranking the engine
Each engine is controlled by a dual-redundant electronic control sys comprised of ___ and ___.
FADECs and FPMUs
COANDA is AUTO activated:
Qe <28%
Ng >67%
Nacelles >52deg
MGT <593C
Weight ON Wheels
What does the power turbine do?
converts gas energy to mechanical energy
Accessory Drive Gearbox Assembly components (FESPA)
FPMU (fuel pressure controls hydraulically powered CVG actuator)
Engine oil pump & regulator assembly (oil pressure sensor)
Starter (primary Ng) (Motors 26%) (Drops at 57%) (Powered by HYD 3)
PMA (Secondary Ng) (Powers ignition sys at 10%, FADECs at 50%
AVV (vents all air from fuel) (Open 2.5% Ng, Close 25% Ng)
Power Turbine Assembly components (PPGS14)
Power turbine forward shaft
Power turbine rotor (Np)
Gas generator turbine rotor (Ng)
Speed Sensor (Np)
14 Thermocouples (MGT) (7 each FADEC)
Gas Generator Assembly (AAAABDI216)
ABC valve (14th stage) (controls ABVs)
ABV Valve (8th stage)(OPENS at 2.5% Ng, CLOSED at 54% Ng)
Air Inlet Housing (bottom strut heated by oil) (lube starter shaft)
Axial Flow Compressor (14 stages)
Bleed Air Port - COANDA, ENG Anti-ice (14th stage)
Diffuser
IGV (1), CVG (5), Stationary (8)
2 Spark igniters
16 Fuel nozzles
Torquemeter Assembly components (METR)
Monopole sensors (Qe) (Secondary Np) (Magnetic Sensors)
Engine mount
Torque shaft
Reference shaft
If any FADEC fails, certain FCC processed FADEC information will be disabled.
Once the FADEC failure is clear or FADEC B override switch is initiated, pressing the ___ will reestablish the normal FADEC processing.
PFCS FAIL RESET
CFG 1/2 are rated to ___ kVA
40 kVA
What is ETL and at what airspeeds is it achieved?
Effective Translational Lift ; 20-30 KCAS
Chip detection/burn - how many in:
- ENG
- PRGB
- TAGB
- MWGB
How many total?
What are the chip detectors/burns monitored by?
ENG - 1/0
PRGB - 3/3
TAGB - 2/Unlimited
MWGB - 1/Unlimited
15 total (1 on APU, 1 on SDC)
Monitored by DSIU
FFR indicator changes to Stall meter/AOA indicator at ___deg Nacelles, only if ___.
<35deg Nacelles ; only if there is no FFR caution
VFG 3/4 are rated to ___kVA
What do they provide power for?
50/80 kVA
Provide power for electro-termal anti-icing/de-icing, avionics cooling, & fuel pumps
Battery:
What kind of battery?
Provides power for?
Low voltage indication comes on at ___ volts
Battery will be disconnected UNLESS one of these 4 conditions (name those conditions).
24-ampere-hour sealed lead/acid battery
Provides for APU or ground maintenance
Low voltage indication comes on at <23.2 volts
BATT disconnection UNLESS one of these conditions exist:
- CFG 1 or 2 is operating
- External power is being supplied
- WOW signal is absent
- APU start sequence has been initiated
APLN mode airspeed limitation
84% Nr ; 280 KCAS
100% Nr ; 220 KCAS
HYD 3 Utility System (CREWCREWLAN)
Cargo Ramp/Door
Rotor brake
Engine starter
Wheel brakes
Cargo winch
RPU
EAPS
Wingstow/Lockpins
Landing gear
ARRP
NWS
The right TAGB drives the #___CFG and the #___ HYD pump.
2 CFG ; #2 HYD pump
Each proprotor assembly is provided electrical power through what component?
Slip Ring Assembly
What is the purpose of the DSIU?
Monitors and controls the ELS
Monitors debris sensors in the PRGBs, TAGBs, MWGB, and both engines
The APU is disengaged from the MWGB at ___% Nr
84% Nr
What component changes the angle of drive and transmits power from the same side PRGB to the mid-wing gearbox and to the opposite TAGB in the event of a single engine failure?
Pylon drive shaft (bevel section of the TAGB)
What provides pressurized compressed air to the ECU and what is that air pressurized to?
SDC ; 40psi
What is the compressed air produced by the SDC used for? (5)
- aircraft air-conditioning
- over-pressurization
- OBIGGS/OBOGS
- pneumatic wing de-icing
- airflow for particle scavenging for the avionics cooling system
What are the steps for EMERGENCY SHUTDOWN?
(ETRABE)
ECL - OFF
T-HANDEL - ARM
ROTOR BREAK - ON unless the reason for the emergency shutdown is due to an ICDS fail or mid-wing fire or mid-wing accessories
APU - STOP
BATTERY - OFF
EGRESS - AS REQUIRED
How often does the GPS update the INS?
every second
When does the EELS come on when armed?
NR <20%
APU - EMERG RUN/ENGAGE allows the ______ to override a ________ (except turbine overspeed/underspeed) which would otherwise cause an emergency shutdown.
ECU ; detected BIT fault
The ELS activates anytime either PRGB oil pressure drops below ______ psi.
30 psi
What gearbox drives the SDC?
MWGB
What does MAP stand for?
MANEUVER SEVERITY - REDUCE
AIRSPEED - <200 KCAS
PFCS - RESET
The PMA supplies power to what components?
- FADECS
- Ignition excitors
- FPMU
- other engine electrical components
What system provides info to both the operator and maintainer regarding vibration, structural life, and rotor track/balance?
VSLED (Vibration Structural Life and Engine Diagnostics
Power required for vertical take-off and landing terminal operations training:
Approach:
-Clear escape route: OGE Hover power
-Restricted escape route or potential LVA: OGE +5%
Departure:
-Clear escape route: 30ft hover power
-Restricted escape route or LVTO: OGE power
At what percent, NR, should number 1/2 generator come online?
72% NR
What is the normal oil pressure range for the MWGB?
40-65 psi
The FADEC requires ______ secs after aircraft power application to complete FADEC power-up self-test.
10 seconds
Power steering lis lost if the nose wheel is outside the ______ deflection limit.
+- 75deg
When does the radar tape automatically declutter and redisplay
Above 1,000 ft
Below 950 ft
When does the altitude digital readout automatically declutter
Above 10,000 ft
Redisplayed below 9,950 ft
Maximum altitude the FE summary CDU control layer will display
30,000 ft
Thunderstorm limits:
At or Above FL230 ; Avoid by 20nm
Below FL230 (not low level) ; Avoid by 10nm
Low Level ; Avoid by 5nm
At what Ng does the APU stabilize
55%
