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Federal Aviation Regulations

Sec. 27.619 — Special factors.

(a) The special factors prescribed in §§27.621 through 27.625 apply to each part of the structure whose strength is—

(1) Uncertain;

(2) Likely to deteriorate in service before normal replacement; or

(3) Subject to appreciable variability due to—

(i) Uncertainties in manufacturing processes; or

(ii) Uncertainties in inspection methods.

(b) For each part to which §§27.621 through 27.625 apply, the factor of safety prescribed in §27.303 must be multiplied by a special factor equal to—

(1) The applicable special factors prescribed in §§27.621 through 27.625; or

(2) Any other factor great enough to ensure that the probability of the part being understrength because of the uncertainties specified in paragraph (a) of this section is extremely remote.

NEXT: Sec. 27.621 - Casting factors.
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