Frontier Airlines Study Guide, VOL 3 Flashcards
What does the ON BAT light indicate?
That at least one of the ADIRU’s is powered by the aircrafts battery. Also illuminates briefly during the beginning of a full alignment.
How long will each ADIRU stay on battery power?
ADIRU 2 and 3 will only remain on battery power for 5 minutes to hold alignment until a generator can be restored. ADIRU will remain on battery power until generator power is restored or battery #2 fails.
What information is provided by the “IR” units?
Flight path vector
Attitude
Track
Heading
Acceleration
Airplane position
Ground speed
What information is provided by the ADR units (BOATS)?
Barometric altitude
Overspeed warnings
AOA
Temperatures
Speed/Mach
What does a steady align light mean (older panel with a keypad)?
The respective IR is in the Align mode
What are the indications on the E/WD when an IR is in ALIGN mode?
Before any engine is started (displayed on E/WD):
IR IN ALIGN X MN memo appears in green when at least one active IRS is being aligned
When one engine is started (displayed on E/WD):
IR IN ALIGN X MN memo appears in amber during IRS alignment
IR NOT ALIGNED is displayed as an ECAM Caution Message if the alignment of one IRS is faulty
IR IN ATT ALIGN appears in green during the IR alignment in Attitude Mode
What does a flashing white align light mean (older panel with keypad)?
There are three reasons that the white align lights will flash:
There is no current position
The position is incorrect
The aircraft moved during alignment
How is the crew alertered to the FMGS having no current position, an incorrect position or if the aircraft has moved during the alignment?
IR IN ALIGN X MN memo pulses in green on the E/WD
How do you do a fast alignment of the ADIRU?
Select each ADIRU selector off and then back to NAV (one at a time) within 5 seconds
What does the IR push button do on the newer ADIRS panel?
Inertial data output of the respective IR is disconnected
What does steady illumination of the amber IR FAULT light indicate?
A fault affects the respective IR
What does flashing illumination of the amber IR FAULT light indicate?
Attitude and heading may be recovered in ATT mode (you have lost the navigation portion)
What does the amber ADR FAULT light indicate?
A fault is detected in the Air Data Reference portion
(FOM VOL III-DSC-34-NAV-10-20)
Does turning the IR Mode Rotary switch to OFF also turn off the ADR?
Yes
Can you turn the ADR OFF and still have the IR?
Yes
(FOM VOL III-DSC-34-NAV-10-20)
When is a full ADIRU alignment required? How about a fast alignment?
Full alignment:
Before the first flight of the day
When there is a crew change
When GPS is not available and NAVAID coverage is poor on the expected route
When GPS is not available and the expected flight time exceeds 3 hours
All international and Alaska flights
Flight in Class 2 airspace
Fast alignment:
A fast IRS alignment must be performed if a complete IRS alignment is not necessary N2 the difference between the IRS position and the FMGC position is at or above 5nm (see MCDU POSITION MONITOR page)
What would be missing on the captains PFD and ND if IR1 failed or was turned OFF?
Attitude and navigation information would be lost. ATT and HDG flags will be displayed on the PFD and MAP NOT AVAIL will be on the ND
What action would recover the attitude and navigation information if IR1 failed or was turned off?
Selecting CAPT3 on the EIS Switching Panel AIR DATA Selector
Describe a post flight ADIRU accuracy check?
If the drift for any IR is >5nm, refer to the IRS performance chart located in FOM VOL II, section 3.20
How many ELACS are installed?
2
What are the functions of the ELAC (Elevator aileron computer)?
Normal elevator and stabilizer control
Normal aileron control
Normal pitch and roll
Alternate pitch
Direct pitch and roll
Abnormal attitude
Aileron droop
Acquisition of autopilot orders
Under NORMAL LAW, what does ELAC 1 control?
Primary - aileron control (roll)
Standby - Elevator/Trimmable Horizontal Stabilizer control (backs up ELAC 2)
What does SEC stand for?
Spoiler Elevator Computer
How man SEC’s are installed?
3