Runway Edge Lights - Downgrade

[Venkman]

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?

[underfire]

This is FAA stds, look at the tables to see what effect and/or NOTAM language is req'd per system degradation or lighting failure.

FAA Instrument Landing System and Ancillary Electronic Component Configuration
and Performance Requirements


This is interesting:

https://www.brainscape.com/flashcard.../packs/6250776

Another checklist:

http://www.airportsindia.org.in/aai_...chapter_11.pdf

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?

The difference in RVR or notification of degraded equipment with reason/effect would be in the NOTAM.