This will be my first posting in the TECH/OPS section, so please excuse my ignorance. Also, I couldnt find this topic.
Back in the day, I remember looking out the window at night during our MIA/LIM route on Eastern Airlines L1011s. I vividly remember staring at the engine covers and seeing about 4 or 5 red lights blinking (turning on and off slowly) in a row. Nowadays, I believe the gran majority of planes have a single strobing red light. Anyway, why the 4 to 5 lights? and why in a row? I also had a poster of an EA L1011 and I remember recalling the picture of the lights on the belly of the airplane. Thanks in advance!!