まだ飛行機まで7時間くらいあるけどチェックインしにT3まで来た。

なんか搭乗券がレシートっぽい感じで残念… https://t.co/3tgFoRsMR8
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Terminal 3
[]
CHANGI AIRPORT
7 t3
  [
    {"relatedness": False, "type": "none", "explanation": "This is not related to public housing or maintenance."},
    ]

It seems that the post does not relate to a maintenance report feedback to a public flat house. The post simply says "7 t3" without providing any context or information that would suggest otherwise. Therefore, the answer is that the post does not relate to a maintenance report feedback to public flat house.