What was found
DURING CLIMB OUT A SLIGHT ACRID ODOR WAS NOTICED. CLIMBING THROUGH FL230 RECEIVED NR 1 BLEED FAIL CAS. UPON LEVELING AT FL270 THE ODOR INCREASED TO AN EXTREMELY STRONG ODOR OF BURNING RUBBER. ANTI-ICE WAS ON UNTIL DESCENT. ODOR DISSIPATED UPON DESCENDING. GAINED ACCESS TO LT & RT BLEED PIPING. NO DEFECTS NOTED. OPERATED ACFT FOR 1.5 HRS AT POWER SETTINGS, IDLE 72% N 9 & TAKEOFF FOR 45 MIN NO ODOR NOTED. PRESSURIZED ACFT USING ENGINES IAW MM CH 21-31-00 NO DEFECTS NOTED. PERFORMED OPS CHECK OF PNEUMATIC BLEED AIR SYS IAW MM 36-00-00 NO DEFECTS NOTED. PERFORMED ANTI-ICE OPS TEST IAW MM CH 30-10-00, OPS CHECKED GOOD.