SDR SWAA2013050115385

Service difficulty report · Pump · Boeing 7373Y0

Difficulty date: April 30, 2013
Submitted: May 1, 2013
Operation: Air carrier
Aircraft: N665WN
Make and model: Boeing 7373Y0
Aircraft serial: 23497
Aircraft time: 84,337 hours, 62,548 cycles
System (JASC): 2913 · Hydraulic Pump (Electric/Engine), Main
Part: Pump
Part number: 623337
Part serial: MX329806
Condition: Faulty
Location: Hydraulic Sys
Stage of operation: UK
How discovered: O
Nature of condition: O
Precautionary procedure: O

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

What was found

DECLARED EMERGENCY - "B" SYS HYD FAILURE. GOT A LOW PRESS LIGHT ON B SIDE ENGINE & PUMP 1ST, THEN LOW PRESS LIGHT B SIDE ELEC CAME ON B HYD QTY BETWEEN 1/4 & 1/2. REMOVED AND REPLACED HOSE, "B" ELEC PUMP AND NR 2 ENGINE DRIVEN PUMP, "B" SYSTEM RETURN FILTER, CASE DRAIN FILTER AND ENGINE CASE DRAIN FILTER.

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