The invention relates to a rotary shaft arrangement carrying equipment at
one end and extending rearwards from the equipment, the shaft (1) being
supported by a first bearing (2) behind the equipment, and by a second
bearing (3) behind the first bearing (2), the first bearing (2) being
carried by a casing (4) surrounding the shaft (1) and extending rearwards
from the first bearing (2) to a stator structure (5) to which the casing
(4) is fastened by screws (6) that extend parallel to the shaft (1) and
that are fusible in traction, the arrangement being characterized by the
fact that the second bearing (3) is disposed with radial clearance (J) in
a bore (7) of an annular support (8) secured to the stator structure (5),
and is fastened to said annular support (8) by screws (9) that are
parallel to the shaft (1) and that are fusible in shear, whereby the
second bearing (3) can bear against said support (8) in the event of said
screws (9) rupturing. The invention relates more particularly to the
support for the fan shaft of a turbojet.