EIS- Electric Instrument System Flashcards
ADIRS & FMGS supply 3 DMCs. What does each DMC supply?
DMC 1- Captain EFIS and ECAM
DMC 2- FO EFIS
DMC 3- Backup
How many channels per DMC?
One channel which can simultaneously provide management of EFIS & ECAM.
Where is sensor data supplied to and then where is it sent?
Supplied to 2 SDACs, which process data and send some of it as system data to the 3 DMCs.
Also sent to FWCs for warnings/alerts.
What is the purpose of data sent from FWCs:
From SDACs?
System sensors?
SDACs- To generate most of amber cautions.
System sensors- to generate red warnings, and remaining amber cautions.
What do the FWCs supply?
-DMCs for display of alert messages.
-attention getters.
-loudspeakers for aural alerts.
How is each ADIRU split?
ADR- receives information from the pitot/static system.
IR- responsible for determining aircraft’s present position and attitude.
Where does each ADR receive information from?
ADIRU 1- captains AOA probe, TAT probe pitot tube and static ports.
ADIRU 2- FOs probes/ports.
ADIRU 3- standby AOA, CAs TAT, standby pitot tube and static ports.
Where does IRU portion of ADIRU receive information from?
Three ring laser gyros (one each for roll, pitch and yaw)- 9 for aircraft.
These detect changes in orientation and spin.
Also from accelerometers (one each for roll, pitch and yaw)- 9 for aircraft. These measure changes in acceleration and gravity-induced forces.
Under normal operations, which DMCs supply which DUs?
-DMC 1 supplies CA PFD and ND, and both ECAM DUs.
-DMC 2 supplies FO PFD and ND.
-DMC 3 is backup and can supply any DU.
2 SDACs (System Data Aquisition concentrators) gather information from aircraft sensors and transmit data to DMCs. What is the data used to generate?
-System display pages
-Engine operating parameters
SDACs also trigger FWCs to generate level 2 cautions.
What is data sent to FWCs from SDACs used for?
-warnings (red) and cautions (amber)
-aural alerts (loudspeakers)
-MASTER WARN and MASTER CAUT
Which ILS receivers supply which DUs?
ILS 1 provides information to CA’s PFD and FO’s ND.
ILS 2 provides information to FO’s PFD and CA’s ND.
Where are indications supplied from for ISIS? (Integrated standby instrument system)
-attitude info from ADIRU 1 & 3 as well as it’s own internal gyro.
-airspeed/altitude info supplied from the standby pitot static system.
-localiser/glideslope info from ILS 1.
Where does information come from for backup display DDRMI? (Digital distance and RMI)
Captains ADIRU.
What does an amber box surrounding digital VSI signify?
IRU vertical speed is unavailable, and ADR is providing a backup barometric signal.
What conditions is DFDR (flight recorder) automatically energised? (4 items)
- For 5 minutes after applying power on the ground.
- On the ground with an engine running.
- Continuously when airborne.
- For 5 minutes after the second engine is shutdown.
When are TO and LDG INHIBIT displayed?
Takeoff- 80kts to 1500AGL
Landing- 800AGL to 80kts
The following failures are not inhibited:
-engine/APU fires.
-engine failures/LO OIL pressure.
-L+R elevator fault.
-FWC 1+2 fault.
-takeoff config warnings (takeoff only).
What do the IR units provide?
(FAT HAAG)
-Flight path vector
-Airplane position
-Track
-Heading
-Attitude
-Acceleration
-Ground speed
What do the ADR units provide?
(BOATS)
-Barometric altitude
-Overspeed warnings
-AOA
-Temperatures
-Speed/mach
What does a flashing IR FAULT light mean?
It is possible that attitude and heading information may be recovered in ATT mode.
What does a flashing IR ALIGN light mean? (3 possibilities)
-IR alignment fault
-no PPOS detected after 10 mins
-difference between shutdown location and entered position exceeds 1 deg of lat/long
What are the post flight accuracy checks for ADIRUs in normal ops?
1) if position deviation is greater than 5 NM on any IRS, and/or
2) GS >= 15 kt on any IR when aircraft is stopped with TK/GS selected on ADIRS panel.
What are the implications of a dual IR fault? ASLD
-Alternate Law
-Speed limit 320 kts
-Landing distance increased 20 percent
-Direct Law Flaps 3 landing
When is speed brake extension inhibited?
(SAFE)
S - SEC 1 and 3 fault
A - AOA protection active
F - Flap configuration full
E - Elevator (L or R) fault (only spoilers 3 and 4 are inhibited)
