NATOPS prep Flashcards
which pitot tube provides info to ESIS
1 pitot
what info is on ESIS
attitude, slip/skid, altitude, airspeed, heading
flight control system type
rigid control rod
collective routing
collective to torque tube beneath cockpit seats then up left pillar and across to mixing unit. along path is lvdt
cyclic routing
cyclic to 2 torque tubes then up right pillar then SAS actuators to mixing unit
pedal routing
pedals combine under center console then rods and bellcranks to yaw sas actuator then t/r servo then link in tail boom to pitch change mechanism
3 functions of pitch change levers
blade flapping limiter stop
pass pitch change inputs from pitch change links to blades
act as mount for hyd dampers
purpose of chinese weights
provide zero pitch return moment to reduce pitch control loads
t/r pitch change names
pitch change links connect to crosshead to pitch change horns to blades
how many T/R driveshafts
2
DC sys numbers
28VDC
AC sys numbers
115/26 Vac 400 Hz single phase
how to secure main bus
turn off gen sw
CB symbology
single block: batt bus
double block: emer bus
nothing: main bus
Battery numbers
24V 27Ah NiCd batt
batt hot at 71+-3C
what does GCU control for
starter control, voltage reg, overvolt, short circuit protection, reverse current protection
AUX GCU job
voltage reg, overvolt, aux bus tie connector, short circuit protec, reverse current protect
EXT pwr voltage requirement
28V
what’s the AC sys for
VG and SAS actuators
ENG name
PT6B-37A
eng type
free turbine turboshaft
1 of axial compressors
3
how is eng mounted to main frame
parallel rod on AGB
tripod of right RGB
bipod on left RGB
when does bleed air valve close for normal ops
91%
What does the AGB drive
HFSOON
high px fuel pump to fcu
FCU
starter generator
oil px pump
oil scavenge pump
N1 tach gen
What is mounted on the AGB
POOF FAS
P3 filter
oil filler neck
oil filter
fuel heater
fuel filter
AGB chip det
starter generator
where is eng oil tank
area between inlet case and AGB
what does RGB drive
main shaft and tail shaft
N2 mech governor
what does RGB provide support for
ILINER
internal torquemeter
left/right eng mounts
internal freewheeling unit
N2 speed sensor
ext torque transducer
rgb chip detector
what kind of sys is eng oil sys
pressurized circulating
what does eng oil sys lubricate
agb, gas gen section, power section, rgb
eng oil cooler bypass numbers
80-90 C through cooler
bypass if backpressure is 35-52 psi
which chip detector is not burnable
AGB
oil flow path
from tank via px pump to px regulating valve to ext oil filter, to lubricate or cooler then scavenged pump back
Inputs to the FCU
P3, twist grip position via RVDT, N2 governor
biggest difference between EEC and MEC
EEC uses LVDT MEC uses in line through mixing unit for collective position
rotor high and low numbers
108.5 and 96.5
when does ITT limit display swap from start to norm
51% N1
where are eng oil temp and px sensors
left lower AGB
fuel tank quantities
upper 538 lb
lower 265 lb each
fuel flow
upper tank through flanges to lower cell then through flapper valves to respective pumps through eng oil/fuel heater, then filter assembly then eng driven fuel pump then another pump then fcu to fuel nozzles
what is mounted on xmsn
1/2 hyd pumps, oil cooler fan, aux gen, rpm sensor
what acts as sump of main xmsn
xmsn AGB
what acts as reservoir for main xmsn
upper case
where are chip detectors in main xmsn
AGB and upper case
what kind of oil sys is main xmsn
splash and spray type
main xmsn oil flow
from upper housing to px pump side of dual pump then to external filter then to oil jets, drains to agb sump, scavenge pump side sends it to ext oil cooler then back to bell housing
thermostatic bypass on oil cooler numbers
bypass begins to close at 54C so more goes to cooler at 78 should be completely closed all oil to cooler
where is xmsn oil px sensor
xmsn agb
where is xmsn oil temp sensor
ext oil filter
TR gearbox oil sys
splash type wet sump
which hyd sys boosts tail
1
where are hyd rservoirs
right side cabin roof
nominal px of hyd sys
1550 psi
hyd fluid flow
reservoir to pump to filter group to by accumulator to servos back to filter group back to reservoir
what differential px do hyd filter pdis pop
70 psi
when does servo off caution turn on
less than 1138+-50 psi
when does hyd overperssurization valve relieve
1640-1850 psi
where are hyd px sensors
in px line after filter
total number of linear actuators
5
