Term
| Which FCCs do AFCS 1 and 2 utilize? |
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Definition
AFCS 1 - uses FCC 1A and 2A
AFCS 2 - uses FCC 1B and 2B |
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Term
| Are both AFCSs always powered and used? |
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Definition
Yes, they are always powered.
AFCS 2 is normally in standby mode. |
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Term
| How is each FCC channel powered? |
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Definition
1A, 1B - BATT BUS
2A - DC ESS BUS
2B - DC BUS 2 |
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Term
| What are the green lights on each side of the flight control panel buttons? |
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Definition
Status Indicator Lights
Left side = FCC 1 (A or B)
Right side = FCC 2 (A or B) |
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Term
| How does the FD function? Onside/offside, Autopilot on/off? |
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Definition
AP off: onside - removes info from both PFDs, offside - alternately removes/displays FD from offside only
AP on: onside - does nothing, offside - removes offside FD |
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Term
| What are the criteria for engaging the autopilot? |
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Definition
At least 1 yaw damper engaged
AP DISC in NORM position
No faults in active pair of FCCs
No significant instability (rates, attitudes, G loads)
2 independent IRS attitude inputs |
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Term
| How many ways can the autopilot be manually disconnected? |
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Definition
6
stab trim switch, AP engage button on FCP, AP DISC bar on FCP, TOGA button, switching AFCS selector, yaw damper DISC switch |
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Term
| When is the autopilot automatically disconnected? |
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Definition
FCC failure or power loss
loss of IRS input
dual yaw damper failure
excessive attitude
stick shaker activation
decreasing performance windshear warning |
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Term
| When are the yaw dampers engaged in flight? |
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Definition
Both are engaged for flight
Above 256 kts, only one is active |
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Term
| When are the flight directors operating independently? |
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Definition
| Takeoff, Go-around and Approach modes |
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Term
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Definition
Rolls to zero bank < 5°
> 5° maintains bank angle
30-45° - returns to 30° |
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Term
| When is half bank automatically engaged? |
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Definition
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Term
| When is half bank mode automatically cleared? |
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Definition
| Takeoff, Go-around, APPR and LOC modes |
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Term
| How are Takeoff and Go-around modes cleared? |
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Definition
Selecting or capturing another active mode
engaging the autopilot
FD SYNC button |
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Term
| When does the ATS self test? |
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Definition
| After the auto-throttle computer is powered up and during the lamp test |
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Term
| When is the ATS system engaged - manually and automatically? |
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Definition
Manual - ATS button
Automatically - 75% N1 |
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Term
| When does Climb mode begin? |
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Definition
AP engaged
Airspeed is 10 kts below bug or
New FMS thrust limit is chosen |
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Term
| When will the ATS disengage automatically? |
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Definition
Wing/cowl is selected at/above 30,000'
N1 split of 13% or greater
either thrust reverser unlocks
N1 > 98.4%
IRS 1 fails |
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Term
| What are the criteria to engage N2 SYNC? |
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Definition
Autopilot engaged
ALT Hold
ATS Speed mode
Speed on speed bug
Airspeed is mach
N1 speeds are withing 6%
Parameters are stable for 30 seconds |
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Term
| What does a flashing "AOALIMIT" mean? |
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Definition
| Low Speed Protection 1.2 VS |
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Term
| What does a flashing "SPEED" mean? |
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Definition
Airspeed is 20 kts below bug speed
Thrust limit is 1% N1 of FMS thrust limit or
Deceleration > .1 kts/sec for more than 10 seconds |
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Term
| What does a flashing "VMOLIMIT" or "MMOLIMIT" mean? |
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Definition
ATS reverts to SPEED mode
Retards throttles for 4 seconds |
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Term
| Which flight director modes can be synced? |
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Definition
| FLC, VS, ALT, PTCH and ROLL |
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Term
| What does a flashing "SPEED" at 100' RA mean? |
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Definition
Retard mode is set.
At 50', "ATS RETARD" will appear and the throttle levers will begin to retard.
At WOW the TLs will fully retard then disengage after 3 seconds. |
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Term
| What happens when the XFR button is pushed on the FCP? |
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Definition
| Couples the autopilot and flight director to the right hand side |
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