Looks like PSAT2-1 DTMF log shows first 2-way DTMF contact between 
N3CRT and KN2X QSO numbers 86 and 87.
See APRSAT

And a total of 17 unique DTMF users:

LW2EE,KI6TSF,KE4AZZ,N3CRT,NN2K,N6AJ,PY5LF,PI6TSF,KK4YEL
K3CRT,KN2K,YD0NXX,P3CRT,F5VKV,KE6BLR,2E0CRV,AB8SA

Though N3CRT, P3CRT and K3CRT are probably the same person.

Since recovery on 26 April, PSAT2 appears completely healthy.

Bob, WB4APR