Please tell me the number of the Singaporean aircraft when filling in the data for the purchase of the test to write with letters? that is, sq-361 for example.

[Alina]

Please tell me the number of the Singaporean aircraft when filling in the data for the purchase of the test to write with letters? that is, sq-361 for example.

[Andrew]

You need to write the flight number. And yes, the flight number contains letters.