What was found
ON CLIMB-OUT, CAPTAIN'S AIRSPEED INDICATOR INDICATED ERRONEOUS AIRSPEED AND MACH. COMPLIED WITH COM 2.31.8.9.10.11.12 "FLIGHT WITH UNRELIABLE AIRSPEED/MACH" IVSI INDICATED INTERMITTENTLY VERTICAL SPEED INFORMATION ONLY. CLIMB STOPPED AT FL 280. ALL CIRCUIT B, REPLACED CAPT A/S IND. PERFORMED OPS CK ON A/S IND AND ADC IAW M/M 34-12-00 AND SUPP M/M 34-12-11. INSP CAPT PITOT TUBE FOUND CONTAMINATED WITH DEBRIS. REMOVED DEBRIS. OPS CHECK GOOD.