Which of the following would be the correct quarter scheduling for the 18M-1 as you are verifying your PMS Schedules that started on the first quarter?

The choice indicating 1, 7, 13, and 19 is correct because it follows the established pattern for scheduling periodic maintenance system (PMS) checks that are based on quarterly intervals. In this scheduling system, the number 1 represents the starting point for the first quarter. Subsequent numbers follow at intervals of six months, corresponding to the various quarters throughout the year.

When analyzing the sequence, it's evident that each quarter progresses by adding six months to the previous occurrence. Therefore, starting from 1 (Q1), the next installment would be 1 + 6 = 7 (Q2), followed by 7 + 6 = 13 (Q3), and finally, 13 + 6 = 19 (Q4). This systematic approach aligns perfectly with the typical practice of setting maintenance schedules based on quarterly operations.

Other options do not align with this quarterly scheduling structure, as they either start on the correct initial quarter but miss the subsequent intervals necessary to maintain consistency over the quarters, or they suggest starting points that do not fit within the established framework of quarterly implementation.