What was found
PHX - DURING INITIAL CLIMB, LOST ALL OIL QUANTITY IN NR 1 ENGINE. OIL PRESS AND ALL OTHER PARAMETERS REMAINED IN THE GREEN. RETURNED TO FIELD AT IDLE THRUST. INSTALLED TEMP THERMOCOUPLE IN NR 1 ENG ACOC WITH NEW O-RING IAW MM 79-32-15 PB401. RAN ENG, LEAK CHECK GOOD. INSPECTED MASTER CHIP DETECTOR, NO DISCREPANCIES NOTED.