Designer-err? or PILOT err?
From slot #21:
"... that NationAir story.... It was also in an older type with poor (or no) overheat loop protection..."
Part 25 still does NOT require Wheel Well Fire Warning -- the DC8, DC10, MD80, MD11 still have NO Wheel Well Fire Detection. We'll need another Nation Air exemplar -- in the USA -- to get that fire safety feature included in future Part 25 Cert' Standards. That's how a FIRE inside ValuJet Cargo Compartment prompted regulator to re-establish the same Fire Safety standard [detection in Cargo] that had first been law in 1947 (after "Star of Lisbon"), but then later abandon in the early '50's (in favor of the narrowbody's newer air-tight concept for the Cargo Compartment on B707).