I reviewed the posts you mentioned and remember reading them a long time ago. I didn't think the anti collision light flashing was relevant because that is the flashing red light you turn on before engine start. The strobes however won't come on until nose oleo strut extends on takeoff. If the poster meant strobe lights flashing during refueling that comes off a different relay than R2-5. That would indicate the nose oleo switch was in air mode, not a failure of R2-5. The nose oleo strut switches control all the relays, not just R2-5. I had a fairly short taxi and was first for takeoff so probably the RAT heater didn't have time to get noticeably hot. Madrid is a much longer taxi for takeoff. I would have assumed they would have checked to see if on taxi out they were in approach idle, if transponder was on on the ground, FDR functions and other nose squat switch functions.