2622 air leak sound from Brake frame aft ~~~~~ 2622 air leak sound from Brake frame aft     #2622 Heavy air leaking from ACU exhaust solenoid v/v. Replaced and function test brake ok. ACU- New s/n: 1538-162  Old s/n: 1937-230 Not: 2118412 Done by Yusof/Din/Zulq. 08/01/20