SMA FERRIED TO ANOTHER ARPT FOR MAINT. FIRST MECH HAD SAID 'OK TO FLY' BUT PLACED SHEET IN BACK OF LOG INDICATING NOT AIRWORTHY.

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MECH AT GRANTS PASS WAS STARTING A 100 HR ROUTINE INSPECTION. HE ADVISED THAT HE WOULD PROBABLY HAVE TO MAJOR THE ENG BEFORE CHKING THE COMPRESSION OR OTHER CHKS. WE ADVISED HIM TO STOP THE WORK AND WE WOULD PAY HIM FOR HIS TIME. WE PICKED UP THE ACFT; A CESSNA 150; WHICH HE ADVISED US WAS OK TO FLY. WE FERRIED IT TO ANOTHER MECH TO DO THE INSPECTION AND THE SECOND MECH DISCOVERED THAT THE FIRST HAD PUT A NOTE IN THE BACK OF THE LOGBOOK ON A SEPARATE SHEET OF PAPER THAT THE ACFT WAS NOT AIRWORTHY. HAD WE KNOWN HE HAD DONE THIS; WE WOULD HAVE OBTAINED A FERRY PERMIT. NO PROBS WHATSOEVER WERE NOTED ON THE FLT TO THE NEW MECH; WHO ADVISED THAT THE ENG WAS NOT EVEN CLOSE TO NEEDING AN OVERHAUL. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES THAT THE NOTE IN BACK OF LOGBOOK INDICATED NOT AIRWORTHY DUE TO NOT COMPLETING THE 100 HR INSPECTION. ACFT WAS STILL WITHIN ITS ANNUAL TIME FRAME AND THUS LEGAL TO FLY. RPTR FEELS THE MECH WHO WAS VERY UPSET; WAS PROTECTING HIMSELF WITH THE NOTE. RPTR CONCERNED THAT MECH MIGHT CONTACT THE FAA; THUS HIS RPT.