| Crewmember | Flight Sergeant F R Spencer |
|---|---|
| Rank | Flight Sergeant |
| Service number | unknown |
| Awards | unknown |
| Date as recorded | 15-16-06-44 |
| Date range | unknown |
| Squadron / unit | 514 |
| Aircraft | Lancaster II (LL690, code JI-J) |
| RAF station / departure | Waterbeach |
| Time | 23:14 |
| Location / duty / target | Valenciennes |
| Incident | Crashed near Iwuy {Nord} |
| Fate | Killed |
| Buried or commemorated | Rieux Communal Cem |
| Command | Bomber Command |
