Runway Edge Lights - Downgrade
My current employer has the standard EASA table for 'Failed or Downgraded Equipment' in the OM. This only gives a downgrade for, 'Edge Lights, Threshold Lights and Runway End Lights' but does not state what percentage of lights failed is classed as failed. Does anyone have a reference to any further information?
I'm sure that previously there was a table or statement referring to the amount of runway lighting available and then a subsequent increase in required RVR. For example, an aerodrome reports a failure to circuit 1 of 2 and 50% of lights are failed, is this classed as failed or operational?