jQuery serializeArray() into new JSON array with individual items

I am using jQuery serializeArray() and it successfully collects the engine form info. However, I need the info in an array so that each “engine” is an item in the new array. Engine 1, Engine 2 etc. Below is my foreach loop that delivers all the engines into the form (2 in this example), and then below that the output I get. How can I get that output in a new JSON array so I can iterate through each item? hope that makes sense.

    



[
 {
  "name": "engine_number",
  "value": "1"
},
{
  "name": "engine_make",
  "value": "P&W"
},
{
  "name": "engine_time",
  "value": "1200"
},
{
  "name": "engine_tbo",
  "value": "2000"
},
{
  "name": "engine_notes",
  "value": "Great engine in good condition"
},
{
  "name": "engine_number",
  "value": "2"
},
{
  "name": "engine_make",
  "value": "P&W"
},
{
  "name": "engine_time",
  "value": "1500"
},
{
  "name": "engine_tbo",
  "value": "2200"
},
{
  "name": "engine_notes",
  "value": "Great engine in good condition"
}
]