SDR DL76L011243

Service difficulty report · Pump · Boeing 767332

Difficulty date: July 26, 2001
Submitted: August 16, 2001
Operation: Air carrier
Aircraft: N178DN
Make and model: Boeing 767332
Aircraft serial: 25143
Aircraft time: 49,988 hours, 7,673 cycles
System (JASC): 2913 · Hydraulic Pump (Electric/Engine), Main
Part: Pump
Condition: Leaking
Location: Hydraulic Sys
Stage of operation: CR
How discovered: O
Nature of condition: K, J
Precautionary procedure: H

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

4 HOURS INTO FLIGHT, CTR HYD "RSVR" LIGHT AND "CTR HYD QTY" EICAS MESSAGE CAME ON. CTR HYD QUANTITY INDICATED 0.47RF. SWITCHED OFF ELEC PUMPS AND QTY CONTINUED TO DECREASE. SWITCHED ELEC PUMPS BACK ON AND ADP OFF AND QUANTITY CONTINUED TO DECREASE. SWITCHED ALL PUMPS OFF AND QTY LOSS STOPPED. CA FOUND LEAK ON ADP PRESSURE & CASE DRAIN FILTER MODULE. REPLACED PACKINGS AND LEAK CHECK THEN OK.