EVA Air B747 - Abnormal/Emergency Landing TPE
Join Date: Jan 2003
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The Quote above refers to the B747-100/200/300/SP where you were able to depressurise the un-affected gear and then retract the affected gears partner thus landing on symmetrical gear. Bit wobbly with only body gear remaining so not a good idea to taxi. With only wing gear the freighter or combi might tend to tip onto it's tail so take a parachute to evacuate.
Capt. Alan Dyson did a body gear only landing in JFK many years ago and got a call from the manufacturer the day after asking how it went? Just fine he replied but why? "First one we've heard of so we were just interested" was allegedly the reply ....
On the -400 it is not possible to selectively retract the gear so a landing on available gear is called for (which was also the procedure on the -200 for a while as I recall)
Happy Wintermas to all!
Capt. Alan Dyson did a body gear only landing in JFK many years ago and got a call from the manufacturer the day after asking how it went? Just fine he replied but why? "First one we've heard of so we were just interested" was allegedly the reply ....
On the -400 it is not possible to selectively retract the gear so a landing on available gear is called for (which was also the procedure on the -200 for a while as I recall)
Happy Wintermas to all!
The Reverend
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OK, being a mere flight engineer, I never got near the 400 but I'm certain you can still depressurize No. 4 hydraulic system and not extend the remaining wing gear after recycling the gear. Failing that, you can still retract all operating gear and extend the body gears only by alternate gear extension.
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Our Classic FHB still says: "LAND ON ALL AVAILABLE GEAR."
We have no procedures for selectively raising gear, or attempting to selectively lower gear after a failure of one set to extend. However, I do realize that it is possible to do so.
We have no procedures for selectively raising gear, or attempting to selectively lower gear after a failure of one set to extend. However, I do realize that it is possible to do so.
In this particular case they had already lost the number 4 hydraulic system so there was no way to retract the left wing gear. I believe Boeing's recommendation is if possible to land on body gear only but not possible this time around.
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I believe Boeing's recommendation is if possible to land on body gear only but not possible this time around.
The airline I work for have their own Flight Crew Training manual which I thought contained the reference but it now just states to land on all available gear. I would presume that this has come from the Boeing Flight Crew Training manual.
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QRH states:
If Landing Gear lever DN or OFF and any gear not down: (continued)
For all other combinations of partial gear extension:
LANDING GEAR LEVER (If possible) . . . . . . . . . . . . .DN
GROUND PROXIMITY/CONFIGURATION
GEAR OVERRIDE SWITCH . . . . . . . . . . . . . . . . . . OVRD
Land on available gear.
If Landing Gear lever DN or OFF and any gear not down: (continued)
For all other combinations of partial gear extension:
LANDING GEAR LEVER (If possible) . . . . . . . . . . . . .DN
GROUND PROXIMITY/CONFIGURATION
GEAR OVERRIDE SWITCH . . . . . . . . . . . . . . . . . . OVRD
Land on available gear.
