What was found
FOUND #2 ENG HPC PHH, PHL PH-PC AND PC PRESSURE SWITCH OPERATION TEST FAIL, WHEN SUPPLY PRESSURE BETWEEN 117-140 PSIG, BIT 16 DOES NOT CHANGE TO 1.(<P>IAW AMM 36-11-08-004-006-007 REV. 129 AND AMM 36-11-08-404-014-007 REV. 129 REPLACED HPC AT NO. 2 ENG. IAW AMM 36-11-08-404-014-007 REV. 129 PERFORMED HPC INSTALLATION TEST, CHECK RESULT = NORMAL AND NO LEAK FOUND. IAW AMM 36-23-00-715-001 REV. 129 PERFORMED AIR SUPPLY CONTROL SYSTEM BITE TEST, CHECK RESULT = NORMAL.</P>)