DOC AIRBUS | AMM A320FTHRUST REVERSER CONTROL AND INDICATING - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
The thrust reverser is controlled from the cockpit by means of the throttle control lever and is only operative on ground.
A thrust reverser control lever, when actuated, allows the throttle control lever to be moved rearward in the reverse thrust selection area and the thrust reverser to be controlled by the Electronic Control Unit (ECU). The throttle control lever, when actuated in the reverse thrust selection area, allows the SOV to be opened through the SEC and a static relay.
The ECU incorporates a thrust reverser command logic based on throttle control lever selection, thrust reverser feedback position and ground/flight configuration, the calculated Mach number, which generates a command signal to the pressurizing valve and the directional valve.
The signal from the ECU to the directional valve is fed to an inhibition relay controlled by the Engine Interface Unit (EIU) according to throttle control lever position.
Each channel of the ECU can control and monitor the thrust reverser.
The hydraulic power required for the actuator is supplied from the normal hydraulic system.
During blocker doors transient, the ECU commands the engine to idle.
The thrust reverser is controlled from the cockpit by means of the throttle control lever and is only operative on ground.
A thrust reverser control lever, when actuated, allows the throttle control lever to be moved rearward in the reverse thrust selection area and the thrust reverser to be controlled by the Electronic Control Unit (ECU).
The ECU incorporates a thrust reverser command logic based on throttle control lever selection, thrust reverser feedback position and ground/flight configuration, the calculated Mach number, which generates a command signal to the pressurizing valve and the directional valve.
The signal from the ECU to the directional valve is fed to an inhibition relay controlled by the Engine Interface Unit (EIU) according to throttle control lever position.
Each channel of the ECU can control and monitor the thrust reverser.
The hydraulic power required for the actuator is supplied from the normal hydraulic system.
During blocker doors transient, the ECU commands the engine to idle.
The ECU is able to know the inhibition status of the thrust reverser through a dedicated MCDU menu. The activation/deactivation through MCDU menu is requested through the deactivation/activation AMM task. Since the ECU knows if the TR are inhibited, it will no longer command deployment when they are inhibited.
In addition, the ECU sends this inhibition status to the FWC which is able to display ENGX REV INHIBITED E/W. When the inhibition status is changed on one channel, the opposite channel synchronized its own inhibition status to avoid discrepancy between channels.
** ON A/C NOT FOR ALL The thrust reverser is controlled from the cockpit by means of the throttle control lever and is only operative on ground.
Thrust Reverser SystemA thrust reverser control lever, when actuated, allows the throttle control lever to be moved rearward in the reverse thrust selection area and the thrust reverser to be controlled by the Electronic Control Unit (ECU). The throttle control lever, when actuated in the reverse thrust selection area, allows the SOV to be opened through the SEC and a static relay.
The ECU incorporates a thrust reverser command logic based on throttle control lever selection, thrust reverser feedback position and ground/flight configuration, the calculated Mach number, which generates a command signal to the pressurizing valve and the directional valve.
The signal from the ECU to the directional valve is fed to an inhibition relay controlled by the Engine Interface Unit (EIU) according to throttle control lever position.
Each channel of the ECU can control and monitor the thrust reverser.
The hydraulic power required for the actuator is supplied from the normal hydraulic system.
During blocker doors transient, the ECU commands the engine to idle.
The thrust reverser is controlled from the cockpit by means of the throttle control lever and is only operative on ground.
A thrust reverser control lever, when actuated, allows the throttle control lever to be moved rearward in the reverse thrust selection area and the thrust reverser to be controlled by the Electronic Control Unit (ECU).
The ECU incorporates a thrust reverser command logic based on throttle control lever selection, thrust reverser feedback position and ground/flight configuration, the calculated Mach number, which generates a command signal to the pressurizing valve and the directional valve.
The signal from the ECU to the directional valve is fed to an inhibition relay controlled by the Engine Interface Unit (EIU) according to throttle control lever position.
Each channel of the ECU can control and monitor the thrust reverser.
The hydraulic power required for the actuator is supplied from the normal hydraulic system.
During blocker doors transient, the ECU commands the engine to idle.
The ECU is able to know the inhibition status of the thrust reverser through a dedicated MCDU menu. The activation/deactivation through MCDU menu is requested through the deactivation/activation AMM task. Since the ECU knows if the TR are inhibited, it will no longer command deployment when they are inhibited.
In addition, the ECU sends this inhibition status to the FWC which is able to display ENGX REV INHIBITED E/W. When the inhibition status is changed on one channel, the opposite channel synchronized its own inhibition status to avoid discrepancy between channels.
2. Component Location
** ON A/C NOT FOR ALL | FIN | FUNCTIONAL DESIGNATION | PANEL | ZONE | ACCESS DOOR | ATA REF |
|---|---|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||||
| 3001KM1 | ACTUATOR-BLOCKER DOOR, UPPER R | 410 | 78-31-41 | ||
| 3001KM2 | ACTUATOR-BLOCKER DOOR, LOWER R | 410 | 78-31-41 | ||
| 3001KM3 | ACTUATOR-BLOCKER DOOR, LOWER L | 410 | 78-31-41 | ||
| 3001KM4 | ACTUATOR-BLOCKER DOOR, UPPER L | 410 | 78-31-41 | ||
| 3002KM1 | LATCH-BLOCKER DOOR, UPPER R | 410 | 78-31-19 | ||
| 3002KM2 | LATCH-BLOCKER DOOR, LOWER R | 410 | 78-31-19 | ||
| 3002KM3 | LATCH-BLOCKER DOOR, LOWER L | 410 | 78-31-19 | ||
| 3002KM4 | LATCH-BLOCKER DOOR, UPPER L | 410 | 78-31-19 | ||
| 4101KS1 | HCU-THRUST REV, 1 | 410 | 71-13-00 | ||
| 4101KS2 | HCU-THRUST REV, 2 | 420 | 71-13-00 | ||
| 4102KS | PRESS SW-HCU | 410 | 78-31-16 | ||
| 4103KS1 | SW-BLOCKER DOOR DEPLOY, L | 410 | 78-31-17 | ||
| 4103KS2 | SW-BLOCKER DOOR DEPLOY, R | 410 | 78-31-17 | ||
| 4104KS1 | SW-BLOCKER DOOR STOW, UPPER R | 410 | 78-31-18 | ||
| 4104KS2 | SW-BLOCKER DOOR STOW, LOWER R | 410 | 78-31-18 | ||
| 4104KS3 | SW-BLOCKER DOOR STOW, LOWER L | 410 | 78-31-18 | ||
| 4104KS4 | SW-BLOCKER DOOR STOW, UPPER L | 410 | 78-31-18 | ||
3. Indicating
The thrust reverser system and thrust reverser operating sequences are monitored through warnings and REV indication on the lower ECAM display unit.
Pressure switch, stow position switches and deploy position switches information are sent to the ECU.
ECAM warning will be displayed in case of fault detection: these warnings are NO GO conditions for the aircraft dispatch.
The thrust reverser system and thrust reverser operating sequences are monitored through warnings and REV indication on the lower ECAM display unit.
Pressure switch, stow position switches and deploy position switches information are sent to the ECU.
ECAM warning will be displayed in case of fault detection: these warnings are NO GO conditions for the aircraft dispatch.
A. Thrust reverser stow position indicating
In case of fault during flight phase, an ECAM warning will be displayed. An amber REV indication will also be displayed:
It first flashes for 9 seconds and then remains steady.
In case of fault during flight phase, an ECAM warning will be displayed. An amber REV indication will also be displayed:
It first flashes for 9 seconds and then remains steady.
B. Thrust reverser operation indicating
(1) Deploy sequence
On ground during deployment, an amber REV indication will come on ECAM in view at the midle of the N1 dial when at least one reverser blocker door is unstowed or unlocked (stroke > 1%). This indication will change to green colour when the reverser doors are fully deployed and the max reverser thrust can be commanded by the ECU.
On ground during deployment, an amber REV indication will come on ECAM in view at the midle of the N1 dial when at least one reverser blocker door is unstowed or unlocked (stroke > 1%). This indication will change to green colour when the reverser doors are fully deployed and the max reverser thrust can be commanded by the ECU.
(2) Stow sequence
During stowage phase, the indication changes to amber when one door at least is less than 95% and disappears when all the doors are stowed.
During stowage phase, the indication changes to amber when one door at least is less than 95% and disappears when all the doors are stowed.