As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN-FLIGHT, NR 1 LOW OIL PRESSURE LIGHT ILLUMINATED, NR 1 OIL PRESSURE GAUGE READ JUST ABOVE LOWER RED RADIAL. OIL QUANTITY READ ZERO. PRECAUTIONARY SHUT DOWN OF NR 1 ENGINE. RETURNED TO BRUSSELS (BRU). GENERATED FROM PILOT REPORT. FOUND LEAKING FITTING AT GEARBOX, STRIPPED BOSS AT FITTING ON OIL PSI SWITCH LINE. HELICOIL INSTALLED BY SABENA. ENGINE RUN AND LEAK CHECK PERFORMED. HELICOIL INSTALLED PER CHAPTER 20-00. (X)