Original Turkish Response Translation

English Translation:

Yes, during the 1971 Maltepe Military Prison escape (November 29, 1971), lead and künk pipes could have been known while digging the tunnel; the Ottoman Kırkçeşme system carried water to the Anatolian side (including Maltepe) through künk (fired clay) and lead pipes, partially renewed in the 1940s-50s.[1][2][3]
Mahir Çayan’s group (Ulaş Bardakçı etc.) dug a 15m tunnel; local water infrastructure knowledge (from villagers/neighbors via tip-off or scouting) would reveal pipe locations, tunnel broken through concrete.[4][5][6]

Period Infrastructure

• Künk pipes: Used since Hittite-Sumerian times in Anatolia for water channels, common in Ottoman Kırkçeşme.[2][1]
• Lead pipes: Widespread in water mains and fountains, Ephesus examples 15cm diameter; remnants existed in 1970s Maltepe.[7][8]
  Escape plan might have used water lines as obstacles/guides, but not mentioned in sources.[4]

Atıflar:
[1] OSMANLI İSTANBUL’UNUN SU TARİHİ | Büyük İstanbul Tarihi https://istanbultarihi.ist/194-osmanli-istanbulunun-su-tarihi
[2] Su Künkleri Nedir? – Bilim Genç – TÜBİTAK https://bilimgenc.tubitak.gov.tr/makale/su-kunkleri-nedir
[3] Dünden Bugüne İstanbul’un Tarihi Su Yolları – ÇEKÜL Vakfı https://www.cekulvakfi.org.tr/makale/dunden-bugune-istanbulun-tarihi-su-yollari
[4] 29 Kasım 1971 – Maltepe Askeri Cezaevi’nden firar! – Yurtsever https://yurtsever.org.tr/2015/29-kasim-1971-maltepe-askeri-cezaevinden-firar-9773/
[5] HE EXPLAINED THE PLAN TO İLHAN SELÇUK – YouTube https://www.youtube.com/watch?v=f0_Ig170_ss
[6] How did the Maltepe Prison Escape End in Kızıldere? – YouTube https://www.youtube.com/watch?v=PcFQdrjZilo
[7] [PDF] 42. KAZI SONUÇLARI TOPLANTISI – Ukaas https://ukaas.ktb.gov.tr/Eklenti/115178,42kazi5pdf.pdf?0
[8] [PDF] Osmanlı Belgeleri Isıgında – İSTANBUL – Vakıflar Genel Müdürlüğü https://cdn.vgm.gov.tr/yayin/dergi/muhtelif/iyyscom.pdf