The RED ARROW lights up if the landing gear is not locked down when the aircraft is in the landing configuration, and a red warning appears on ECAM. What does the RED ARROW on the landing gear selector lever indicate?Ī11. The lights on the LDG GEAR indicator panel come on as long as the LGCIU#1 is electrically supplied. Is it true that the lights on the LDG GEAR INDICATOR panel illuminate if the LGCIU #1 is supplied with electricity?Ī10. The RED UNLK Lights come on Red if the gear is not locked in the selected position. What is the meaning of red UNLK lights on the LDG Gear Indicator panel?Ī9. They also supply information about the landing gear to ECAM for display, and send signals indicating whether the aircraft is in flight or on the ground to other aircraft systems. Two Landing Gear Control and Interface Units (LGCIUs) control the extension and retraction of the gear and the operation of the doors. It also switches over in case of failure.Ī8. One LGCIU controls one complete gear cycle, then switches over automatically to the other LGCIU at the completion of the retraction cycle.
How many LGCIUs are fitted on A320 a/c and what is the transfer logic for each LGCIU?Ī7. After emergency gear extension do the gear doors remain open? Is nose wheel steering available after emergency gear extension? –> Allows gravity to drop the gear into the extended position. –> Unlocks the landing gear doors and the main and nose main gear, –> Isolates the landing gear hydraulics from the green hydraulic system, When a crew member turns the crank, it :. What happens when the Emergency Gear Extension crank handle is operated?Ī4.
–> Landing Gear Extension must be performed by gravity. –> Landing Gear retraction is inoperative In the case of ADR1+3 Fault, the Landing Gear Safety Valve is controlled closed. Will landing gear operate normally if ADR 1 + 3 fail?Ī3. At what speed will the safety valve cut off hydraulic pressure to the landing gear? When the aircraft is flying faster than 260 knots, a safety valve automatically cuts off hydraulic supply to the landing gear system What happens to the green hydraulic supply to L/G when a/c is flying faster than 260kts?Ī1. If there is any conflicting information, your FCOM shall be the overriding reference.
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