Stuff Flashcards
8 reasons for FADEC shutdown
1.) ECL aft of start
2.) Ng over speed
3.) Np over speed
4.) no light off detection on eng start
5.) stagnated start or flameout on eng start
6.) failure of second FADEC and Ng speed <59%
7.) failure to relight on flameout detection
8.) MGT > 779 on Eng start
Coanda auto activated when?
1.) Qe <28%
2.) Ng >67%
3.) nacelle angle >52 deg
4.) MGT < 593
5.) NIU receives WOW indication
Main purpose of the inner outer loop?
Maintain Nr
When does the temperature switch shutdown FADEC B?
> 80 deg C
FADEC B override switch
Overrides the shutdown of FADEC B from temps over 80
Purpose of the FPMU
Controls fuel pressure and flow as well as the CVG actuator in response to signals from the FADECs
AVVs?
Air vent valves purge air in the fuel pump outlet during engine start
PMAs power what?
Exciters, FADECs, FPMU, and other engine electrical components
PMAs provide sufficient power to drive the ignition system at all speeds above ____% Ng and to power FADECs at a min of ____% Ng
10%
50%
Engine oil tank quantity
3 gallons
Engine oil gauge yellow region is displayed as green for the first ____ min of weight off wheels due to _____
15
Gulping
Interim power on?
Nac < 70
Aspd < 60
An engine restart cannot be initiated until Ng is below ____%
29%
EAPS auto mode on ____ and off ____
On: < 60 KCAS
Off: > 70 KCAS
How many thermocouples? Why?
14; 7 per FADEC
What do monopole sensors measure?
Qe and secondary Np
Where does the starter get power from?
Hyd 3
What happens at 2.5% Ng?
AVV/ ABVs Open
Main purpose of the drive system?
- transmit torque from the engines to the proprotors
- provide synchronization of the props
- provide power for electrical, hydraulic, and pneumatic powers
What is mounted on the MWGB?
Rotor break
RPU
CFG 1
VFG 4
SDC
APU
oil cooler
Hyd 3
When does the RADALT declutter?
Disappear?
1,000 ft
10,000 ft
Purpose of DSIU?
Monitor chip burn and ELS
when does ELS kick in? Turn off?
PRGB oil pressure drops below 30 psi
Off at 35 psi
Hard Braking: ____
Light braking: ____
< 20 KCAS
< 60 KCAS
Wing feed tanks designed to maintain a ___ min supply of fuel
30
8 major functions of the FMU
- measure fuel quantity
- manage fuel burn sequence
- manage ground/ aerial refueling defueling and fuel dump
- monitor fuel sys health and isolate component faults
- communicate sys status to GRDP
- communicate sys status to avionic system
- communicate fuel status to SFD
- communicate low engine/ gearbox oil levels to the GRDP and maintenance flight summary page
Max touchdown speed for a ROL?
88 GS
MLG bay fire indications?
No indications
LG isolation valve closed?
-WOW
-up / down and locked
- airspeed > 180 KCAS
- hyd 3 detects a leak
Out of range switch for nose wheel
70 deg from center
Max airspeed down for LG
150 KCAS
Max airspeed with gear retracting or extending
140 KCAS
Sink rate > 46,000 lbs
600 fpm
Sink rate < 46,000 lbs
720 fpm
What allows Hyd 3 to pressurize all systems?
Ground checkout valve
HYD PRESS LO comes on < ____
4600 psi
What Nr does Hyd 1 and 2 begin pressurizing their respective systems? What valve sends Hyd 3 back?
58% Nr
Fluid compensation valve
Hyd 1 and 2 detection levels
30, 40, 50 in ^2
Hyd 3 detection levels
45, 60 in ^2
How many INSs
3, one per FCC
Stall warning is only produced for what nacelle angles?
0-35 deg
If the cabin doors are not locked, the nacelles don’t go past ___
45 degrees
Max flaps?
73 deg
Can you fly with out VSLED sensors operational?
No
Before a PAC, operate engine for ___ min with MGT > ____
5 min; 620 deg
SDC provides air to…
OBIGGS/ OBOGS
air cooling
Over pressurization
Wing de icing
Particle scavenging
Heading hold < ___ KCAS
Coordinated turn > ____ KCAS
45
50
Opposed lateral cyclic
4 degrees to reduce downwash over wings and improve power
Max angle of bank
60 deg
Which FADEC is located inner of the firewall
FADEC B
Beta gorverning
The engine is unable to keep up with PDS and the rotors begin to slow, to compensate, they take pitch out and spin the rotor back up and reintroduce pitch
Starter drops out at ___ % Ng
57
____ ft diameter rotor blades
38 ft
Primary path through rotor blade? Secondary?
Primary CV joint
Secondary Beam
Pitch horns are connected to ….
Trailing edge of proprotor
Blade twist
47.5
84% Nr limited to ___ KCAS or ___ mach
100% Nr limited to ____ KCAS or ___ mach
280 KCAS/ .48 mach
220 KCAS / .46 mach
How wide is the CV
85 ft
ICDS upward tilt ___ and forward wing sweep ____
3.5 deg
6 deg
What happens if the SDC gets a chip
Shuts down
Parameters for BFWS
WOW
ECLs off
Nr 0 deg
Rotor brake off
INS drift rate
.8 nm/ hr
Enhanced Interrupted Alignment
Reduces INS drift rage from .8 to .5 nm/ hr by doing a 90 deg turn during alignment
GPS and INS must be accurate within ____
300 ft or .05 min
