The reserve energy absorption drop test must be conducted as follows:
(a) The drop height must be 1.5 times that specified in §27.725(a).
(b) Rotor lift, where considered in a manner similar to that prescribed
in §27.725(b), may not exceed 1.5 times the lift allowed under that
(c) The landing gear must withstand this test without collapsing.
Collapse of the landing gear occurs when a member of the nose, tail, or
main gear will not support the rotorcraft in the proper attitude or allows
the rotorcraft structure, other than the landing gear and external
accessories, to impact the landing surface.
[Doc. No. 5074, 29 FR 15695, Nov. 24, 1964, as amended by Amdt.
27-26, 55 FR 8001, Mar. 6, 1990]
n=limit inertia load factor.
nj=the load factor developed, during impact, on the
mass used in the drop test (i.e., the acceleration dv/dt in g
's recorded in the drop test plus 1.0).