Operational Check of Ram Air Turbine (RAT) Automatic Deployment

ATA29
HVN-A318-_-A319-_-A320-_-A321-AMM-01-Nov-2020-29-22-00-710-006-A-Operational-Check-of-Ram-Air-Turbine-RAT-Automatic-Deployment

  • The Hot Battery Bus 701PP supplies 28 V DC to the deploy solenoid 1 on the RAT actuator when the OVRD HYD switch 2805GE is operated.
  • The elec ovrd (24XE) and hyd ovrd (2805GE) pushbutton switches are installed in the flight compartment. The hyd ovrd pushbutton switch is on the HYD section of the overhead panel 40VU. The elec ovrd pushbutton switch is on the EMER PWR section of the overhead panel 21VU. Both pushbutton switches make it possible for the flight crew to extend the RAT from the flight compartment. Both pushbutton switches have guards to stop accidental operation.
  • The hyd ovrd pushbutton switch (identified as RAT/MAN/ON in the flight compartment) when operated connects the 28 V DC supply from HOT BUS 1, 701PP directly to solenoid 1.
  • The elec ovrd pushbutton switch (identified as RAT & EMER GEN/MAN ON/AUTO in the flight compartment) when operated connects the 28 V DC supply from No. 2 BATTERY through circuit breaker 6XE to solenoid 2. At the same time the 28 V DC is supplied to the control unit of the CSM/G 8XE.
  • Ở vị trí AUTO , solenoid 1 của RAT được cấp bởi nguồn 703PP khi đáp ứng đầy đủ các điều kiện của mạch AUTO DEPLOY LOGIC.
  • Logic của AC FAIL tại 2 ENG liên quan đến 2 nguồn : 101XP và 202XP , khi 2 cầu chì 9XE và 11XE được nhổ , mạch AC FAIL được đáp ứng.
  • Điều kiện 100 kts đáp ứng được thực hiện khi test trên MCDU.
  • Lưu ý khi thực hiện test : Do not operate the RAT deployment solenoids for more than 60 seconds. You can operate the solenoids more than once during the test. When th e time of operation (solenoids energ ized) is max. 60 seconds, you must let the solenoids cool for 30 minutes.
ASM-A318A319A320A321-HVN-Rev.-num_-69-01-Nov-2020-Figure-24-24-02-SCH-02-P-0025-SHEET-1_2-ELECTRICAL-POWER-AC-EMERGENCY-GENERATION-AC-EMERGENCY-GENERATION-CSM_GGCU

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