Thanks for that, re the 717. Hard to cater for (any) incorrectly applied Maint procedures
Nigel, in that case, the 717 T/R lockout pins were not installed correctly. If maintenance does it wrong (as they did then), crews can still detect it during their preflight (pins are obvious, red painted and protrude when installed correctly in the B717 as well as some other types as you relate). I do not know about the MD8x.