Service difficulty report · Hydraulic System · Airbus A320232

Difficulty date
September 17, 2021
Submitted
September 17, 2021
Operation
Air carrier
Aircraft
N405UA
Make and model
Airbus A320232
Aircraft serial
452
Aircraft time
87,532 hours, 33,769 cycles
Part
Hydraulic System
Condition
Leaking
Stage of operation
IN
How discovered
9
Nature of condition
K
Precautionary procedure
K

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

What was found

ECAM CAUTION MESSAGE - G RSVR LO AIR PR MESSAGE INOP - HYD ON DES INTO ORD 15K CREW DEBRIEF: ON DESCENT THROUGH 15,000, CREW NOTICED ECAM FOR GREEN SYSTEM LOW PRESSURE. THEY LOOKED AT THE HYD PAGE AND QUANTITY WAS NEAR ZERO (ARROW POINTING IN LOWER YELLOW BOX). PUMP. THEY USED THE ALTERNATE GEAR EXTEND PROCEDURES TO DROP THE THEY RAN THE ECAM PAGE AND TURNED OFF PTU AND GREEN HYDRAULIC BACK UP BELOW THE GREEN BAND. GEAR. AFTER LANDING THEY NOTICED GREEN HYDRAULIC SYSTEM ON ECAM LAST LEG ECAM REPORT SHOWS: HYD G RSVR LO LVL, HYD G ENG 1 PUMP FRESH HYD FLUID AROUND GREEN SYSTEM ACCUMULATOR AND ACCUMULATOR INDICATION MATCHING THE EXTERNAL GAUGE. ALL 3 HYDRAULIC LO PR, HYD G SYS LO PR. INITIAL WALK AROUND SHOWS FLIGHT DECK RESERVOIRS HAVE FLUID IN THEM AND ARE CLEAN AND DRY ALL AROUND. FROM THE VENT BELOW ALONG THE RIGHT SIDE OF AIRCRAFT BACK....ALL OTHERS LOOK NORMAL PRESSURE NEAR ZERO. THERE IS A TRAIL OF FRESH HYDRAULIC FLUID ALSO NOTICD STREAK OF WHAT LOOKS LIKE HYD FLUID RUNNDOWN DOWN A VENT BELOW THE TWO FAN COWLS ALL THE WAY BACK ON #1 ENG. SEE ATTACHED IMAGES. HOPE THIS HELPS PRESSURIZED HYDRAULIC SYSTEMS, CYCLED ALL FLIGHT CONTROLS AND TAXI CHECK PERFORMED ON LP 7059430. NO ECAM MESSAGES PRESENT. SEVICED HYDRAULIC SYSTEMS NO LEAKS NOTED REF AMM 12-12-29. ADD EMP:172292

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