SDR ASMF202011001

Service difficulty report · Pump · Boeing 737752

Difficulty date: September 10, 2020
Submitted: November 24, 2020
Operation: Air carrier
Aircraft: N788XA
Make and model: Boeing 737752
Aircraft serial: 33788
Aircraft time: 55,692 hours, 27,578 cycles
System (JASC): 2913 · Hydraulic Pump (Electric/Engine), Main
Part: Pump
Part number: 66087
Part serial: 660873200
Condition: Leaking
Location: Hyd System
Part time: 24,972 hours, 11,104 cycles
Stage of operation: IN
How discovered: 9
Nature of condition: K
Precautionary procedure: K

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

What was found

DURING TRANSIT CHECK, A HYDRAULIC LEAK WAS DETECTED ON RIGHT ENGINE. MAINTENANCE PERSONNEL PERFORMED REVISION DETECTING HYDRAULIC LEAK AT EDP PUMP OUT OF LIMITS, SO THE RIGHT ENGINE EDP PUMP WAS REPLACED, IAW AMM 29-11-11 AND AMM TASK 29-00-00-870-801. OPERATIONAL TEST WAS PERFORMED, IAW AMM 71-00-00-700-821-F00, TESTED CORRECT.