PPRuNe Forums - View Single Post - Nitrogen Tyre Inflation
View Single Post
Old 7th Mar 2009, 13:03
  #10 (permalink)  
Graybeard
 
Join Date: Nov 2006
Location: SoCalif
Posts: 896
Likes: 0
Received 0 Likes on 0 Posts
FAA Requires it in Part 121

and probably in Part 25 ops.

It was about 1987 that a Mexicana 727-200 arrived at Mexico City airport with squawk of dragging brake. Departing Capt took the plane without delay, had his wife aboard and kid on his lap to depart for KLAX and Disneyland. It was a full 178 SOB, at gross.

Brake was still dragging, so he powered back to help tug move the plane. MEX is 7400' elevation, with warm to hot temps. Normal initial climbout in 727-2 there is 500'/min until cleaned up, after rotating upon reaching the red lights at the last 1,000' of 13,000.

Pilot had retracted gear right after takeoff, of course. There was a catastrophic explosion before they reached cruise.

Cause was initially thought to be a bomb. Reportedly this was the Capt wife first flight since surviving a bomb in a 727 as FA some years prior.

NTSB determined that oxygen in the tire combined with volatile gases released from the very hot rubber made an explosive mixture, and only needed a spark.
--------

A similar fate befell a DC-8 on hajj in that same year.

-------

Yes, 100% nitrogen is better than air in even your car tires. Its larger molecules won't leak out as easily, so I'm told.
Graybeard is offline