What was found
BLEED 1 LIEAK ENROUTE CLIMBING THROUGH FL210. QRH PROCEDURE COMPLIED WITH, MESSAGE EXTINGUISHED, DECLARED EMERGENCY CHG EQ FLT CONT. C/A: GROUND FOUND NR 7 JOINT LEAKING AIR. R & R NR 7 O-RINGS IN REF TO AMM 36-11-10 AND RE-CONNECTED NR 7 COUPLER. PERFORMED LEAK CHECK ABOUT 15 MINS, IN REF TO AMM 36-11-09. NO LEAKING FOUND AT THIS TIME & NO MESSAGE NOTED.