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(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

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04/27/21

Message Overview:

Message Name:

MAIN ENTRY DOOR HARD OR SLOW TO OPEN

Identifier: 521OBS002
Effectivity: Aircraft 20501 - 20999
System: Doors
Associated CAS: None
System Description: 52-00-00
Schematic Diagram: 52-11-00
Wiring Diagram: 52-11-25

Message Description:

The Main Entry Door (MED) seems stiff or slow to open in the beginning of the opening sequence.

Possible Causes:

  • Passenger (PAX) Door Telescopic Struts
  • PAX Door Actuator (MPE33)
  • Relay (K191)
  • Relay (K193)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

NOTE: If the problem occurs in cold weather, door can be cleaned with alcohol and dried to remove any residual moisture.

Quick Links:

Open the Passenger Door AMM 52-11-00-010-801
Close the Passenger Door AMM 52-11-00-410-801
General Visual Inspection of the Passenger Door - External AMM 52-11-00-210-801
General Visual Inspection of the Passenger Door - Internal AMM 52-11-00-210-802
Detailed Inspection of the Passenger Door Alignment AMM 52-11-00-220-804
Adjustment of the Passenger Door AMM 52-11-01-820-801
Removal of the Passenger Door Actuator AMM 52-11-25-000-801
Installation of the Passenger Door Actuator AMM 52-11-25-400-801
Removal of the Passenger Door Telescopic Strut AMM 52-11-41-000-801
Installation of the Passenger Door Telescopic Strut AMM 52-11-41-400-801
Adjustment of the Passenger Door Telescopic Strut AMM 52-11-41-820-801
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02

Troubleshooting Recommendations:

  1. Perform a general visual inspection of the door.

    1. If defects are found, rectify as required.
    2. If no defects are found, continue with next step.

  2. Make sure the door is properly lubricated.
  3. Inspect the telescopic struts.

    1. If the struts are found leaking or damaged, rectify as required.
    2. If the condition of the struts is good, continue with next step.

  4. Perform the adjustment of the PAX door telescopic struts. Is the problem still present?

    1. If YES, continue with next step.
    2. If NO, do close out.

  5. Perform an electrical check of relays K191 and K193 using SSM 52-11-00.

    1. If the relays function properly and all contacts are open/close as per drawing, continue with next step.
    2. If defects are found, rectify as required.

  6. Replace the PAX door actuator.
  7. Do close out.

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