What was found
NR 1 TRANSPONDER READS 300-400 FT LOW AT FL 320. RELEASED FOR SERVICE PER MEL/CDL: 34-26-A CATEGORY: C EXPIRATION: 27JUN06 "MEL 34-26-A: NR 1 TRANSPONDER INOP." USING PITOT/STATIC BOX DROVE ALTITUDE TO 32K FOR BOTH AIR DATA COMPUTERS. CHECKED BOTH TRANSPONDERS AT DIFFERENT ALTITUDES, ALL INDICATIONS AND TRANSPONDER OUTPUTS CHECKED CORRECT. BOTH SYSTEMS DISPLAYED 32.0 AT 32,000. NO PROBLEMS NOTED WITH THE NR1 TRANSPONDER OR AIR DATA. ALL TEST CONNECTIONS WERE EXTERNAL. NO A/C LINES DISTURBED. RVSM STATUS REMAINS VALID. ALL WORK REF MM 34-54-00-5.