What was found
C-CHECK TEST FLT, DURING ICE TEST, DETECTED A STRONG ODOR. MECH SAID ODOR ASSOCIATED WITH GREASE ON O-RINGS OF 14TH STAGE BLEED AIR VALVE. CREW RECEIVED NO INDS OTHER THAN ODOR, CONTINUED. AFTER T/O, AT 1,000 FT, RECEIVED A "LAV SMOKE" WARNING, ASSOCIATED WITH ODOR. MECH SENT TO LAV TO INVEST, INFORMED APPROACH OF IND OF SMOKE & WOULD RETURN, EMERGENCY NOT DECLARED. FOUND NO SMOKE OR FIRE IN LAV, BUT HAZE COULD BE SEEN. LEVELED OFF AT 3,000 FT & TURNED BACK , ODOR DISSIPATED & LAV SMOKE IND DID NOT RETURN AFTER RESETTING. RAN "LAV SMOKE" QRH, RAN ALL NORMAL CHKLISTS, & LANDED. NR 2 ENG SHUTDOWN. MX PERFORMED OPS TEST OF NR 2 ENG PNEU SYS, NO EVIDENCE OF SMOKE. CONDITION CAN'T BE DUPLICATED IAW MM.