Federal Aviation Regulations
Sec. 23.1021 — Oil system drains.
A drain (or drains) must be provided to allow safe drainage of the oil system. Each drain must—(a) Be accessible;
(b) Have drain valves, or other closures, employing manual or automatic shut-off means for positive locking in the closed position; and
(c) Be located or protected to prevent inadvertent operation.
[Amdt. 23–29, 49 FR 6847, Feb. 23, 1984, as amended by Amdt. 23–43, 58 FR 18973, Apr. 9, 1993]
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