Date: 05 Aug 97 17:45:51 From: firstname.lastname@example.org Organization: a2i network References: 1 Followups: 1 2
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"jdobyns" <email@example.com> wrote: > My understanding is that modern jetliners have the ability to take off > safely even if one engine fails on takeoff. If so, did they ever figure > out why the one flight leaving Chicago in the late 70's crashed after an > engine fell off? There is a significant difference between an engine failing to produce thrust and an engine separating from a wing. Certification requires demonstration only of the former. The latter can be expected to do considerable damage to the wing during separation. An example follows. During 1995 (possibly late 1994), a US Navy P3C Orion belonging to VP-47 (the Golden Swordsmen) was decending over the Persian Gulf for a landing in Saudi Arabia. Seven minutes out, an indicator light illuminated signalling low pressure in the hydralics which control the variable pitch of the propeller on the #4 engine. The pilots initiated the procedure to shut the engine down, switch it to fixed pitch, and restart the engine. Moments before shutdown, the #4 engine exploded. A propeller blade from the #4 engine struck the #3 engine, separating the #3 engine from the wing. The residual inertia (from the propeller blade) of the now joined #3 engine and #4 propeller blade threw the still spinning #3 engine into the underside of the fuselage. The spinning propeller blades of the #3 engine cut through all three hydraulic systems, and cut the emergency shutdown wires for the #1 and #2 engines, shutting them down for the last time. The Orion was now two minutes out over the Gulf, with no power, no hydraulics, a mutilated starboard wing, and not enough altitude to eject. Less than ten seconds before impact, the pilots managed to attain ditching attitude. The most serious injury was injested JP-5. The hull was pulled from the water, and is now used for firefighting practice at a Saudi airfield. M Carling -- Microsoft Network is prohibited from reproducing this work, in whole or in part. Copyright 1997, M Carling. License is available to Microsoft Network to reproduce this work for $1000. Unauthorized reproduction by Microsoft Network constitutes agreement to these terms. Please report violations to firstname.lastname@example.org and email@example.com.