Service difficulty report · Pump · Boeing 737890

Difficulty date
October 21, 2023
Submitted
October 23, 2023
Operation
Air carrier
Aircraft
N564AS
Make and model
Boeing 737890
Aircraft serial
35103
Aircraft time
62,299 hours, 18,566 cycles
Part
Pump
Part number
66087
Part serial
K1222
Condition
Faulty
Location
#1 Engine
Part time
56,441 hours, 24,691 cycles
Stage of operation
CR
How discovered
9
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

ENG 1 HYD PULP LOW PRESSURELT ILLUMINATED ELEC 2 HYD PUMPLOW PRESS LT ILLUMINATED IN 1 HR BEFORE LANDINGENG 2 HYD PUMP LOW PRESS LT ILLUMINATED, BUT EXTINGUISHED DECENDING ALT 18,000. GROUNDED - YES. REMOVED ENG 1 DRIVEN PUMP REF AMM 29-11-11.54204 10-22-2023. INSTALLED #1 HYDRAULIC DRIVEN PUMP PER AMM 29-11-11. Y-CHOY 79520. REQUIRES HYDRAULIC A&B FLUSHING. TASK 29-11-00-170-801. Y-CHOY 79520. PERFORMED HYDRAULIC A&B FLUSHING PER AMM 29-11-00-170-801.COMPLETED INSTALLATION TASK. OPS CHECK GOOD. NO DEFECTS NOTED. E JASSO 23718. OPENED MIG-2C 40-005320 CLOSED MIG-2C 40-005320. OPENED MIG-2C 40-0053204 CLOSED MIG-2C 40-0053204.