Here's a picture I found. You can see the burn-thru hole on top of the fuselage, just ahead of the leading edge of the vertical fin – the black blob above the Air Force star.. Looks a real mess close up, burnt wiring bundles and some structural damage. Lucky the crew spotted the fire on the roll; a few minutes later and it might easily have become another ValuJet.
Haven't found any reference to the use of locking wire on the oxygen system unions in the accident report yet, but still reading ..... Perhaps it isn't used (any more) ???
We picked up a jumbo for a two-sector home run years ago. The ground engineer said "Bit of an oxygen leak, the flight manager says its ok, he brought it out like that. We've topped it right up so you shouldn't need more at your transit station." (NB not permitted to replenish oxygen with pax on board and no desire to off-load and re-board the transit pax with the joiners.)
We said 'Where's it coming from ? Where's it going to ? Bucket of soapy water time ...."
IIRC, this model had two crew bottles and eight large pax bottles in the underfloor hold. Of the pax bottles, one was found to be shut off completely and another had the union nut tightened onto it's own locking wire so it was never going to stop leaking. Took less than ten minutes to find and fix. Never found out (and hate to think) how long it had been like that.
LFH