Stored/Parked Aircraft With Flaps Extended? — Tech Ops Forum

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Stored/Parked Aircraft With Flaps Extended?

Warreng24 From United States, joined Nov 2005, 577 posts, RR: 0
Posted (3 years 2 weeks 2 days 22 hours ago) and read 2840 times:

Why are the stored aircraft parked with theiy flaps extended? Any particular reason?

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10 replies: All unread, jump to last

Bingo From United States, joined Nov 2006, 353 posts, RR: 1
Reply 1, posted (3 years 2 weeks 2 days 21 hours ago) and read 2834 times:

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AMARC takes these birds apart to provide parts for those still in service. I would imagine that this configuration makes them easier to take apart. Once the fluids and batteries are gone, I dont think it would be too easy to take some of these structures apart.

PPVRA From Brazil, joined Nov 2004, 6073 posts, RR: 48
Reply 2, posted (3 years 2 weeks 2 days 21 hours ago) and read 2806 times:

Quoting Bingo (Reply 1):

Makes sense. Also, could wind have anything o do with it? Making the aircraft less likely to shift if not even flip over (unlikely, but happens to smaller planes)?

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474218 From United States, joined Oct 2005, 3756 posts, RR: 1
Reply 3, posted (3 years 2 weeks 2 days 20 hours ago) and read 2778 times:

The flaps can not be lowered without hydraulic power, so they extend them so you can get to all the attaching hardware.

L-188 From United States, joined Jul 1999, 28604 posts, RR: 73
Reply 4, posted (3 years 2 weeks 2 days 20 hours ago) and read 2777 times:

On some aircraft the flaps will bleed down over time.

I remember a DC-6 one that had to RON at my airfield, Over the course of the night you could visible see the flaps get lower and lower

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CanadianNorth From Canada, joined Aug 2002, 3207 posts, RR: 16
Reply 5, posted (3 years 2 weeks 2 days 19 hours ago) and read 2756 times:

Quoting L-188 (Reply 4):
On some aircraft the flaps will bleed down over time.

I remember a DC-6 one that had to RON at my airfield, Over the course of the night you could visible see the flaps get lower and lower

I was thinking it could be something along those lines as well. At my work last summer we had a mower that did something like that, hydraulics are what hold up the cutting units while your driving between areas that you're going to mow, and on longer rides you would have to pull the lever a few times because the cutting units would slowly sink down as you went along. So yeah, my guess would also be whatever holds the flaps up lost its grip over time.

CanadianNorth

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Pilotpip From United States, joined Sep 2003, 2628 posts, RR: 14
Reply 6, posted (3 years 2 weeks 2 days 19 hours ago) and read 2749 times:

By the time I finish fueling a 727 the Fowler flaps are usually dropped all the way down because the hyd system is not powered.

When fueling a DC-10 that's been sitting all weekend it's not uncommon for all the control surfaces to be "drooped" a little.

DMI

HAWK21M From India, joined Jan 2001, 27785 posts, RR: 61
Reply 7, posted (3 years 2 weeks 2 days 18 hours ago) and read 2734 times:

Easier to access components when unpowered condition.
regds
MEL

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Sinlock From United States, joined Dec 2000, 1474 posts, RR: 4
Reply 8, posted (3 years 2 weeks 1 day 11 hours ago) and read 2537 times:

Also, Woth aircraft that are being used for parts some of the first things to go are hydraulic fittings, sequnce valves, and actuators. So in many cases you couldn't power up the systems if you wanted to.

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Miamiair From , joined Dec 1969, posts, RR:
Reply 9, posted (3 years 2 weeks 1 day 11 hours ago) and read 2531 times:

Quoting Pilotpip (Reply 6):
By the time I finish fueling a 727 the Fowler flaps are usually dropped all the way down because the hyd system is not powered.

Minor Correction:
Kruger/Leading Edge Flaps. The Fowlers are the trailing edge flaps...

[Edited 2006-11-14 15:40:36]

N231YE From , joined Dec 1969, posts, RR:
Reply 10, posted (3 years 2 weeks 4 hours ago) and read 2381 times:

Two reasons:

a) to permit easier access to various hardware and auctuators, so that they can be removed and salvaged,

b) the hydralic system(s) is drained to enable it to be taken apart and salvaged: so once the flaps are extended, system drained and dismantled, the flaps are permanently extended.