IGh...
Thanks for that, re the 717. Hard to cater for (any) incorrectly applied Maint procedures
On the B757/767 and A320 series, the lock out pins / whatever are clear to the Flt Crew on the walkround... less obvious maybe on other types, particularly with engines mounted about your level. That said, the error you relate might not even be as simply seen as "pins in place"?
NoD