More on landing problems

Date:         23 Nov 96 03:36:24 
From:         Stefano Pagiola <spagiola@worldbank.org>
Organization: World Bank
References:   1 2 3
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Continuing with the debate of landing problems due to safeguards preventing
in-flight deployment of spoilers:

In addition to the Piedmont 737 accident at Charlotte, there's also the
USAir DC-9 accident at Erie, PA, on Feb 21, 1986 (DC-9-31 N961VJ).  The
aircraft landed on runway 24, which was covered with snow, with a
quartering tailwind.  Although armed, the spoilers did not auto-deploy.
The Pilot's handbook for the DC-9 cautions crews to monitor spoilers when
landing on slippery runways, since THE SPOILERS AUTO-DEPLOY ONLY WITH
WHEEL SPIN-UP OR WHEN THE NOSE WHEEL IS ON THE GROUND.  The pilot operated
the spoilers manually, actuated reverse thrust, and lowered the nose, but
was unable to stop on the runway.  The aircraft over-ran the runway and
was damaged beyond economic repair.  Luckily, there was only 1 minor
injury.

So there you have it, all of you who thought only aircraft designed by
state-subsidized European manufacturers with delusions of grandeur had
such problems.

Stefano
All opinions expressed are my own