Study program after failing IREX.
DAY 1 - Insert 6 pack (full strength) x 2 if required.
DAY 2 - Get AIP look in section Pg no ENR 1.5 -31 refer to 5.4 runways equipped with HIAL NO ILS. If its out and the vis is below the minima plus the 900m then alternate required. ILS ENR 1.5 -33 Section 8 for ILS 1.5Km no HIAL then vis <1.5Km alternate required.
DAY 3 - Pass IREX
DAY 4 - Refer to Day 1