{"data":{"id":"us/49-cfr-229.59","jurisdiction":"us","citation":"49 CFR 229.59","heading":"Leakage.","body":"(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.\n(b) Brake pipe leakage may not exceed 5 pounds per square inch per minute.\n(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.\n(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.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER II—FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","PART 229—RAILROAD LOCOMOTIVE SAFETY STANDARDS","Subpart C—Safety Requirements"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-49.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:34Z","sha256":"54820908b531c86b763007837c7617ed33c9b17bc22a6bf20ba22aec3a1bdb74","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-229.57","next":"us/49-cfr-229.61"},"notice":"GroundRules: Original legal text. Not legal advice."}