Before descent, the flight crew prepared for a RNP approach with LNAV/VNAV minima3 to CDG runway 27R4 . The meteorological conditions indicated in the ATIS Q used by the flight crew when preparing the approach were the following: transition level 70, wind 280 / 10 kt, visibility 10 km, broken clouds at 1,500 ft, few cumulonimbus (CB) at 5,000 ft, temperature 19 °C, dew point 14 °C, QNH 1001. The crew stated that during all the approach they remained in clouds, without visual references. They experienced moderate turbulence and flew through heavy rain, using the wipers at high speed ... At the time of the incident, the ILS of runway 27R was out of service.
No ILS ? - um, remind me how many parallel main runways CDG, one of the key airports of Europe, has. And in heavy rain, with questionable cloud base. And seemingly advised even at first contact they were getting a runway with no ILS.