188.8.131.52.1 Retardation Tests
(a) three drop tests with a total test weight equal to the manufacturer's rated maximum load for which the porting is designed [see 184.108.40.206(a)]
(b) one drop test with a total test weight equal to the manufacturer's rated minimum load for which the porting is designed (see 220.127.116.11)
Following each drop test, the buffer shall be held in its fully compressed position for a period of 5 min, and shall then be allowed to return freely to its fully extended position and stand for 30 min to permit return of the oil to the reservoir and to permit escape of any air entrained in the oil.
On each of these tests, the average retardation of the test weight, during the stroke of the buffer, shall not exceed 9.81 m/s2 (32.2 ft/s2), and any retardation peak having a duration of more than 0.04 s shall not exceed 24.5 m/s2 (80.5 ft/s2).
On completion of the drop tests, no part of the buffer shall show any permanent deformation or injury.