What was found
ODOR AFTER APU BLEED WAS TURNED ON, CONTINUED AND GOT WORSE AFTER TAKEOFF. FINALLY DISSIPATED. INFORMED BY CREW, CABIN DEVELOPED STRONG HEATER TYPE ODOR ON TAKEOFF, TINGED WITH A VINEGAR, MUSTY OILY ODOR. EYES AND THROATS AFFECTED. ODOR DISSIPATED AT CRUISE. UPON START OF DESCENT, ODOR RETURNED FULL STRENGTH SAME AS TAKEOFF. PERFORMED WORK CARD 05-96-84 AND 05-96-85. UNABLE TO DETERMINE SOURCE OF ODOR DUE TO LACK OF INFORMATION FROM LAST FLIGHT CREW.