Service difficulty report · Hydraulic System · Boeing 737823

Difficulty date
August 9, 2026
Submitted
August 10, 2026
Operation
Air carrier
Aircraft
N889NN
Make and model
Boeing 737823
Aircraft serial
33314
Aircraft time
41,231 hours, 17,885 cycles
Part
Hydraulic System
Condition
Low Pressure
Location
Zone 100
Stage of operation
CR
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

AIRCRAFT WAS GROUNDED: CLIMBING OUT OF SMF, ON GEAR RETRACTION, THE HYD MASTER CAUTIONCAME ON FOR ABOUT 3 SECONDS THEN BLINKED OUT. AT CRUISE WE NOTICED HYD SYS A DROPPING 1% EVERY 5-10 MINUTES. HYD SYS B WAS DROPPING ABOUT 1% EVERY 15-20 MINUTES. ON DESCENT, SYS A WAS 64% AND B WAS DOWN TO 89%. DECESION MADE TO DIVERT TO ABQ, NO EMERGENCY DECLARED AND AIRCRAFT LANDED WITHOUT INCIDENT. AFTER LANDING SYS A IS AT 86% AND B IS AT 92%. MAINTENANCE INSPECTED ENTIRE AIRCRAFT FOR HYD LEAKS AND NO LEAKS FOUND. PERFORMED BLEEDING OF HYDRAULIC SYSTEMS IAW AMM 29-00-00. SERVICED HYDRAULIC IAW AMM 12-12-00. RAN BOTH ENGINES AND PERFORMED HYDRAULIC PUMPS CHECK, NO DROPPING NOTED REF AMM 71-00-00. OK FOR SERVICE.