What was found
**CHRONIC LVL-2** DUE TO INCREASING FREQUENCY IN CREW O2 SERVICI NG WRITE-UPS, ACCOMPLISH THE FOLLOWING..1) PERFORM CREW O2 LEAK CHECK IAW AMM 35-11-00-795-106. PAY CLOSE ATTENTION TO ALL FITTI NGS AND PROPER STORAGE OF MASKS. LEAK WILL MOST LIKELY BE SMALL. REPLACE ANY MASKS THAT ARE WORN OR DAMAGED. IF AVAILABLE, USE M ARKSMAN ULTRASONIC LEAK DETECTOR M&E: 39-2020-0-5025. THIS TOOL HAS PROVEN TO BE VERY HELPFUL FINDING SMALL LEAKS. CORRECT ANY D EFECTS FOUND...2) PLEASE RECORD THE FIRST AND LAST TESTED PRESSU RE "DROP/HR" OBSERVED IN SIGNOFFS.THANKS! ORDLM PIPERS. CARRIED BY ELB NEED POSITIVE FIX. BEEN GOING ON FOR A WHILE.