14 CFR · Part 27
14 CFR § 27.1017
Oil lines and fittings.
(a)
Each oil line must be supported to prevent excessive vibration.
(b)
Each oil line connected to components of the rotorcraft between which relative motion could exist must have provisions for flexibility.
(c)
Flexible hose must be approved.
(d)
Each oil line must have an inside diameter of not less than the inside diameter of the engine inlet or outlet. No line may have splices between connections.
Reflects the eCFR edition current as of September 29, 2026. Retrieved from ecfr.gov on October 16, 2026.
Primary Source