---
kind: "section"
citation: "49 C.F.R. § 229.59"
title: "49"
number: "229.59"
heading: "Leakage."
url: "https://uscodex.org/cfr/49/229.59"
---

# §229.59. Leakage.

- (a) Leakage from the main air reservoir and related piping may not exceed an average of 3 pounds per square inch per minute for 3 minutes after the pressure has been reduced to 60 percent of the maximum pressure.
- (b) Brake pipe leakage may not exceed 5 pounds per square inch per minute.
- (c) With a full service application at maximum brake pipe pressure and with communication to the brake cylinders closed, the brakes shall remain applied at least 5 minutes.
- (d) Leakage from control air reservoir, related piping, and pneumatically operated controls may not exceed an average of 3 pounds per square inch per minute for 3 minutes.

## Notes

### Authority

Authority: 49 U.S.C. 20103, 20107, 20133, 20137-38, 20143, 20168, 20701-03, 21301-02, 21304; 28 U.S.C. 2461 note; and 49 CFR 1.89.

### Source

Source: 45 FR 21109, Mar. 31, 1980, unless otherwise noted.