ED Decision 2021/003/R
EXAMPLE OF REPORTING DEPTH OF CONTAMINANT WHENEVER THERE IS A SIGNIFICANT CHANGE
(a) After the first assessment of runway condition, a first RCR is generated. The initial report is:
5/5/5 100/100/100 03/03/03 SLUSH/SLUSH/SLUSH
Note: The full information string is not used in this example.
(b) With continuing precipitation, a new RCR is required to be generated as a subsequent assessment reveals that the depth of contamination has increased from 3 mm to 5 mm along the entire length of the runway and therefore a change in the RWYCC is needed. A second RCR is therefore created as:
2/2/2 100/100/100 05/05/05 SLUSH/SLUSH/SLUSH
(c) With even more precipitation, a further assessment reveals that the depth of contamination has increased from 5 mm to 7 mm along the entire length of the runway. However, a new RCR is not required because the RWYCC has not changed (change in depth is less than the significant change threshold of 3 mm).
(d) A final assessment of the contamination reveals that the depth has increased to 10 mm. A new RWYCC is required because the change in depth from the last RCR (second RWYCC), i.e. from 5 mm to 10 mm is greater than the significant change threshold of 3 mm. A third RCR is thus created as below:
2/2/2 100/100/100 10/10/10 SLUSH/SLUSH/SLUSH
For contaminants other than STANDING WATER, SLUSH, WET SNOW or DRY SNOW, the depth is not reported. The position of this type of information in the information string is then identified by /NR/.
When the depth of the contaminants varies significantly within a runway third, additional information is to be given in the plain-language remark part of the situational awareness section of the RCR.
This example illustrates RCR reporting for slush depth changes, showing when new RCRs are required based on the 3 mm significant change threshold and RWYCC changes.
* Summary by Aviation.Bot - Always consult the original document for the most accurate information.
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