Records are arranged by service number in series ADM 273. If you do not have the service number, the card index to names in The National Archives should help you to identify it.

Royal Air Force (RAF), RFC & RNAS: First World War, 1914-1918: Service Records

British Armed Services: Campaign Medals, and other Service Medals

First World War: Disability and Dependants' Pensions

Royal Air Force: Operational Records

William Spencer, Air Force Records for Family Historians, (PRO, 2000)

It may be worthwhile checking to see whether the officer was awarded any medals.