14 CFR · Part 25
14 CFR § 25.619
Special factors.
The factor of safety prescribed in § 25.303 must be multiplied by the highest pertinent special factor of safety prescribed in §§ 25.621 through 25.625 for each part of the structure whose strength is—
(a)
Uncertain;
(b)
Likely to deteriorate in service before normal replacement; or
(c)
Subject to appreciable variability because of uncertainties in manufacturing processes or inspection methods.
Regulations Referenced
Reflects the eCFR edition current as of September 29, 2026. Retrieved from ecfr.gov on October 16, 2026.
Primary Source