Allosaurus...totally agree...this is the simplest way to prevent a recurrence..current pre UOE incident policy required a tech log entry when cowls were opened but apparently rarely done..already post UOE a duplicate sign off in AML needed when cowls have been opened.....totally impracticable on a walkround for flight crew to lie under the engine to confirm latch closure especially if cowling weight gives impression of totally closed and if latches have been secured closed when cowling was open...fault lies with poor design feature and also with authorities for failing to act on many previous events...VS A320 LGW Incident in 2000? raised all these concerns.