Re: Swissair MD11 Crash - additional details

Date:         10 Sep 98 03:04:31 
From:         kls@ohare.Chicago.COM (Karl Swartz)
Organization: Chicago Software Works, Menlo Park, California
References:   1 2 3 4
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> http://www.ntsb.gov/NTSB/Query.htm shows 10 incidents on the MD-11 since 1
> January 1996, none fatal; that same database shows 20 for the 767, including
> 1 fatal (Ethiopian) in the same time period, 21 for the 757 (3 fatal), 20 for
> the 747 (3 fatal), 8 for the TriStar (1 fatal), and 11 for the DC-10 (none
> fatal). If the MD-11's record since 1996 qualifies it for "a string of
> incidents" then so does that of everyone else ...

But the MD-11 fleet size is only around 170-180, versus over 700 for the
767 and over 800 for the 757.  The 747 fleet size is surely much larger
than for the MD-11, though with retirements an exact count is harder to
come up with.  Counts for the L-1011 and DC-10 are likewise difficult to
pinpoint.

So, the MD-11 incident rate per aircraft in service is over twice that
of the 767, 2.24 times that of the 757, and probably at least a bit
higher than its stablemate, the DC-10.

The MD-11 is furthermore a longer-range aircraft than any of the others
you mention except for the 747, hence the incident rate per cycle
(takeoff and landing) probably shows an even greater spread.  While not
exactly a staggering difference, it does seem that the MD-11 has had
more than its fair share of incidents.

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Karl Swartz	|Home	kls@chicago.com
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