What was found
NR 1 COMM WOULD NOT TRANSMIT OR RECEIVE DURING FLIGHT. HAPPENED DURING CLIMB FROM FL 090 TO 110. FOUND BAD COMM NR 1 COAX CABLE. REMOVED AND REPLACED COMM NR 1 COAX CABLE IAW EA500 AMM 23-10-00. PERFORMED VOICE COMMUNICATION ADJUSTMENT TEST IAW EA500 AMM 23-10-00. CHECKED GOOD. RESECURED AND PERFORMED ADJUSTMENT TEST OF LEFT PFD IAW EA500 AMM 31-10-00. OPS CHECK GOOD. VERIFIED TRANSPONDER NR 1 AND NR 2 COMPLY WITH FAR 91.413 APPENDIX F. PERFORMED ALTITUDE CORRELATION TEST PER PARAGRAPH C OF FAR PART 43 APPENDIX E. NO DATA CORRESPONDENCE ERRORS FOUND FOR TRANSPONDERS NR 1 AND NR 2.