SYS 3 Flashcards
Steady IRU “NAV OFF” Light means:
A - Aligning (for 10 minutes)
O - Off (When IRU selected off)
F - Failed (When IRU fails)
Flashing IRU “NAV OFF” Light means:
NO, BAD, MOVE
NO INIT (haven’t pushed “Initialize IRS *” prompt within 10 minutes of selecting IRU to NAV.
BAD present position loaded (> 1 degree from shutdown coordinate, about 60 nm.
MOVE-ment during the align process.
CADC provides what info on PFD/ND
SPEEDS AND ATL’s
- Airspeed Tape
- Top Foot
- Altitude Tape
- TAS
IRU provides what info on PFD/ND
AXIS MOTION ITEMS AND GROUND SPEED
- Attitude
- Heading (True and Magnetic)
- Vertical Speed
- Ground Speed
- Position
APU on the ground provides:
Electric and Air
APU in flight
Electric Only
Trim Air Manifolds run through:
The Avionics Bay
“ECON” (air panel) will auto ON/OFF:
For various reasons including SMOKE ELECT/AIR switch operation. Most normally used during delayed engine start.
“AVNCS FAN” “FLOW” Switch Light Illuminated
C.P.A.
- Cooling (Insufficient air for cooling, avionics or CAC)
- Pressurization (Cabin inflow is insufficient for press)
- Alt (Cabin Alt is above 10,000’
“CAB ALT” >10,000’ in “AUTO” or “MAN” has what result on the air system?
ECON off (Packs at high flow)
“NO MASKS” light
Masks didn’t drop by 14,770’
Button only functional after the light comes on.
Hold switch for 3 seconds to drop masks in LAV/CRA
“AVNCS OVHT” Light
Assumes leak in trim air manifold.
Betty closes both Trim Air PRV’s in Auto or Manual.
CABIN AIR “SMOKE/OFF” switch
In AUTO or MANUAL: (Only AFTER you push the switch) - closes Cargo Zone Conditioned Air S/O Valve.
Should you connect 2 or more Eng. pneumatic supply systems?
NO
“MANF” light on #1
Leak between #1 Engine and Fuselage
“MANF” light on # 1 & #2
Leak in Left forward tunnel, forward of CAC
“MANF” light on #2 only
Leak aft of the CAC
“MANF” light on # 3 only
Leak between #3 engine and fuselage or right forward tunnel.
“MANF” light all 3 systems
Leak in CAC
Number of pressurization controllers
2 controllers, 1 channel each
Max Dif Press on Ground
.5 psid
Pressurization system maintains 100’< Field Elevation on takeoff until when?
5000’ AFE for emergency return.
Eng 2 Anti-Ice Duct Overheat Indications Dual Shroud
Level 1 Alert “ENG 2 A-ICE DUCT”
OK to use system.
Eng 2 Anti-Ice Duct Overheat Indications Single Shroud
Level 1 Alert “SEL ENG 2 AI OFF” transitions to
“ENG 2 AI OFF” when selected off.
or
Level 3 Alert “ENG 2 A-ICE DUCT” if valve doesn’t close (fails to self protect).
