Division 7.2.3.2 When the manufacturer requests to conduct a running-in procedure in accordance with point 7.2.3.1, it may be carried out on either of the following:

1. (a)

   all the engines that are tested;

2. (b)

   the first engine tested, with the determination of an evolution coefficient as follows:

   1. (i)

      the pollutant emissions shall be measured both on the newly manufactured engine and before the maximum of 125 hours set in point 7.2.3.1 on the first engine tested;

   2. (ii)

      the evolution coefficient of the emissions between the two tests shall be calculated for each pollutant:

      • Emissions on second test/Emissions first test

      • The evolution coefficient may have a value less than one.

The subsequent test engines shall not be subjected to the running-in procedure, but their emissions when newly manufactured shall be modified by the evolution coefficient.

In this case, the values to be taken shall be the following:

1. (a)

   for the first engine, the values from the second test;

2. (b)

   for the other engines, the values when newly manufactured multiplied by the evolution coefficient.