PIC: Fokker 100 unsafe gear, doors slide over the runway...

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Stratofreighter
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PIC: Fokker 100 unsafe gear, doors slide over the runway...

Post by Stratofreighter »

http://avherald.com/h?article=433fc9f0&opt=0
Gear doors in general are a continued source of worry on the F70/100. Uplock failures are common as are corrosion and structural failures in the form of cracks.

In this case however, the doors hanging down is caused by using the alternate system, which opens the doors but doesn't close them after gear extension.

Depending on acft weight and type og gear fitted the doors either just clear or just touch the tarmac.
Any "hands on" expert on this forum care to comment :?:

PHOTO at http://avherald.com/h?article=433fc9f0&opt=0
Incident: Austrian F100 at Minsk on Nov 29th 2010, unsafe gear

By Simon Hradecky, created Monday, Nov 29th 2010 10:12Z, last updated Monday, Nov 29th 2010 17:58Z


Passenger disembark (Photo: BMOE)

An Austrian Airlines Fokker 100, registration OE-LVK performing flight OS-689 (dep Nov 28th) from Vienna (Austria) to Minsk (Belarus) with 81 passengers and 4 crew,

did not receive a gear down and locked indication for the left hand main gear while on approach to Minsk and aborted the approach.

The crew performed an alternate gear extension and subsequently landed safely in Minsk with open gear doors about 25 minutes later.

The return flight the following morning was cancelled.

Belarus' Ministry of Emergencies (BMOE) reported, that the landing was safe, the unsafe indication for the left hand main gear was false.

Austrian Airlines said, that the crew prepared the passengers for a possible gear up landing according to checklists and had them brace for landing.

The airplane landed normally.

Technicians have been flown to Minsk to examine the aircraft and determine what caused the unsafe indication, which probably was caused by a fauly sensor and an indication problems.

Both main gear struts extended after landing (Photo: BMOE):
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Benjamin
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Re: PIC: Fokker 100 unsafe gear, doors slide over the runway...

Post by Benjamin »

True,

Alternate down gives an hydraulic full dump, not possible to reset by pilots so no closure of the doors and no nose wheel steering. (only brakes)

During landing doors close a little bit due to ground effect, at slow speeds the doors begin to grind over tarmac.
(No matter how light aircraft is, allways hits the ground, thick alluminium pad are there to protect the doors.)

Need to know more ? Just ask ;)

Btw i do wonder why above poster tells us about common problems with uplocks when the actual problem this time was a downlock sensor ;)
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