Luxair E145 at Saarbruecken on Jul 3rd 2006, lost nosewheel on taxiing out and departed

Last Update: August 24, 2015 / 14:31:02 GMT/Zulu time

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Incident Facts

Date of incident
Jul 3, 2006

Classification
Report

Airline
Luxair

Flight number
LG-9727

Departure
Saarbruecken, Germany

Destination
Munich, Germany

Aircraft Registration
LX-LGI

Aircraft Type
Embraer ERJ-145

ICAO Type Designator
E145

A Luxair Embraer ERJ-145, registration LX-LGI performing flight LG-9727 from Saarbruecken to Munich (Germany), was taxiing via taxiway C to runway 09. While turning left the axle of the left nose wheel fractured and the wheel separated. The crew remained unaware the nose wheel had separated, however noticed metallic debris on the threshold of runway 09. The crew commenced takeoff, and after becoming airborne reported they had seen metal debris on the runway. A runway inspection found the left nose wheel as well as two metallic rings, the crew was notified accordingly. On approach to Munich the crew performed a low approach to have the gear inspected from the ground, the inspection suggested the right nose wheel had remained undamaged. The aircraft landed without further incident.

The BFU released their final report without formal conclusion, but reporting:

The nose landing gear of the Embraer EMB 145 was equipped with a through axle which was fitted in the centre of the landing gear leg. The two nose wheels were mounted with tapered roller bearings to the two axle legs to the left and right of the landing gear leg. Crown nuts held the mounting and therefore the wheels in place. The fastening torque of the crown nuts determined the bearing clearance. Bolts prevented the crown nuts from spinning off the axle.

The left axle leg fractured in the area of the inner wheel mounting. The mounting directly adjacent to the fracture was destroyed, and showed distinct staining due to overheating.

The fracture pieces were examined at the Technische Universität Braunschweig, Institut für Werkstoffe (IfW). The macroscopic appearance of the fracture surface did not allow a definite identification of the type of fracture. Therefore the fracture surface was examined using a scanning electron microscope. The micro-ductile comb structure typical for forced raptures was found. To verify the result a reference fracture was induced on the larger of the fracture pieces which subsequently showed the same micro topography. In summary it was determined that the wheel axle was not pre-damaged by a fatigue crack. No indications were found pointing to a corrosive attack. The entire fracture surface showed exclusively signs of forced rupture.
Incident Facts

Date of incident
Jul 3, 2006

Classification
Report

Airline
Luxair

Flight number
LG-9727

Departure
Saarbruecken, Germany

Destination
Munich, Germany

Aircraft Registration
LX-LGI

Aircraft Type
Embraer ERJ-145

ICAO Type Designator
E145

This article is published under license from Avherald.com. © of text by Avherald.com.
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