Farm the Sciser in the bottom runway, then shinecharge. Interrupt using the Sciser on the center mountain.

Entrance condition:

{
  "comeInWithRMode": {}
}

Requires:

"Gravity"
"Morph"
{
  "or": [
    "h_CrystalFlashForReserveEnergy",
    {
      "and": [
        "h_RModeCanRefillReserves",
        {
          "partialRefill": {
            "type": "ReserveEnergy",
            "limit": 20
          }
        }
      ]
    }
  ]
}
"h_shinechargeMaxRunway"
{
  "autoReserveTrigger": {}
}
"canRModeSparkInterrupt"

Dev note: Samus is able to enter this door in R-mode, even if the tunnel is not expanded. She can then morph and 'fall' into the tunnel.