Service difficulty report · Pump · Boeing 737924ER

Difficulty date
June 19, 2024
Submitted
June 21, 2024
Operation
Air carrier
Aircraft
N62892
Make and model
Boeing 737924ER
Aircraft serial
42195
Aircraft time
28,698 hours, 10,539 cycles
Part
Pump
Part number
849589
Part serial
MX769936
Condition
Faulted
Location
Nr 1 Hyd System
Part time
33,272 hours, 11,792 cycles
Stage of operation
CR
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

HYD PUMP LOW PRESSURE LGHT ON. SYS A. ENG1 PUMP. R&R HYD SUPPLY LINE IAW IPC 29-11-51-01A AND REQUIRES SYSTEM FLUSH IAW AMM 29-11-00-170-801 PARTS USED: 29-2911-3-0007,QTY :1 29-2910-9-0003,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1512995 SN OFF 8936 CONTACT TOMC UNLOCKED TO CLEAR FOUND CASE DRAIN SUPPLY LINE UNLOCK AND LOOSE AT THIS TIME CASE PHOTOS FOUND SUPPLY LINE AND UNION BELLOW REQUIRED TORQUE, REMOVED ENG INSTALLED ENG 1 EDP IAW AMM 29-11-11-400-801-001 UPTO AND DRAIN LINE IS NOW LOCK AND SECURED 1 HYD PUMP IAW AMM 29-11-11-000-801-001, WHILE INSPECTING LINES INCLUDING STEP 3)H)1)E) FOUND HYDRAULIC COKING IN SUPPLY LINE AND ON PUMP IMPELLER,,, CASE DRAIN AND PRESSURE LINES NO DEFECTS NOTED. AS PRECAUTION ADD EMP:U389938 PUMP, HYD ENG D OFF 29-2910-9-0003 8936 ON 29-2910-9-0003 3292 COMPLETED INSTALLATION FROM STEP 3)H)1)E TO COMPLETION OF EMDP IAW AMM 29-11-11-400-801-001,, OPS CHECK AND LEAK CHECK OK PERFORMED HYDRAULIC SYSTEM A FLUSHING IAW AMM 29-11-00-170-801,, CHANGED ALL APLICABLE FILTERS TWICE UNTIL NOT CONTAMINATION NOTED,, OKAY TO CONTINUE