My pilot father recounted a story once where he was going through the landing checklist. He was interrupted by the controller on the radio, then continued with the checklist. He'd skipped lowering the landing gear, which is a deadly mistake (he was informed of this by the ground).
Thereafter, whenever he was interrupted while doing the checklist, he started it over.
I recall an "Aviation Disasters" episode where the cause was the pilot was interrupted during his takeoff checklist, and skipped setting the flaps to takeoff position.
My pilot father recounted a story once where he was going through the landing checklist. He was interrupted by the controller on the radio, then continued with the checklist. He'd skipped lowering the landing gear, which is a deadly mistake (he was informed of this by the ground).
Thereafter, whenever he was interrupted while doing the checklist, he started it over.