Service difficulty report · Pump · Boeing 7378H4

Difficulty date
May 6, 2025
Submitted
May 7, 2025
Operation
Air carrier
Aircraft
N8565Z
Make and model
Boeing 7378H4
Aircraft serial
42533
Aircraft time
23,757 hours, 12,164 cycles
Part
Pump
Condition
Failed
Location
Zone 400
Stage of operation
AP
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

ON APPROACH; 'B' ENG DRIVEN PUMP LOW PRESSURE LIGHT FLICKERED AND THEN CAME ON SOLID. ELECT B PUMP LOW PRESSURE LIGHT ALSO ILLUMINATED. VERIFIED QTY WENT TO ZERO. FOLLOWED QRH. FOUND FLUID COMING FROM HYD DRAIN PAD DRAIN. SUSPECT THE PUMP FAILED.<[01] FOUND #2 ENGINE HYD PUMP HAD FAILED. R&R #2 ENGINE HYD PUMP AND ALL CASE DRAIN FILTERS. LEAK AND OPS CHECKS GOOD PER AMM 29-11-11; 29-11-51; 29-11-41

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