Service difficulty report · Isolation Valve · Airbus A320232

Difficulty date
October 18, 2024
Submitted
October 21, 2024
Operation
Air carrier
Aircraft
N440UA
Make and model
Airbus A320232
Aircraft serial
702
Aircraft time
83,594 hours, 34,647 cycles
Part
Isolation Valve
Part number
4063160823
Part serial
23210657
Condition
Faulted
Location
Nr 1 Engine
Part time
1,548 hours, 729 cycles
Stage of operation
CL
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

ENG 1 BLEED LEAK, FOLLOWED BY APU AND ENG 2 BLEED LEAK ECAMS. - TOMC KROWN UPDATED MAA CODE FIX USING VENDOR MAA SCREEN PLEASE CONTACT TOMC BEFORE COMMENCING ANY WORK. PERFORM CHECK BLEED SYSTEM FOR POSSIBLE LEAKS AND CALL TOMC 847-700-9980 UPDATED MAA CODE FIX USING VENDOR MAA SCREEN PLEASE CONTACT TOMC BEFORE COMMENCING ANY WORK. PERFORM CHECK BLEED SYSTEM FOR POSSIBLE LEAKS AND CALL TOMC 847-700-9980 FOUND PNEUMATIC LEAK FROM CLAMP FORWARD OF OZONE CONVERTER ASSY RIGHT PACK PNEUMATIC CLAMP ADJUSTED AND TIGHTENED. LEAK CHECK GOOD. BMC 2 LAST LEG REPOT FAULTED X FEED VALVE 6HV. REMOVED AND INSTALLED CROSSBLEED VALVE 6HV IAW REFERENCE: 36-12-52/401. OPERATIONAL TESTED OF THE APU BLEED AIR SUPPLY AND CROSSBLEED SYSTEMS REFERENCE: TASK 36-12-00-710-001-A OPS CHECK GOOD. VALVE, ISOLATIO OFF 31-3612-9-9001 0657 ON 31-3612-9-9001 5676 VALVE, ISOLATIO OFF 31-3612-9-9001 0657 ON 31-3612-9-9001 5676 PARTS USED: 31-3612-9-9001,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1324223 SN OFF 0657 PRESSURIZED AIRCRAFT IAW PRESSURIZATION TEST FOR AIR LEAKAGE OR A DIFFERENTIAL PRESSURE OF 280 MBAR (4.06 PSI) REFERENCE: TASK 05-53-00-780-001-A. AIRCRFT PRESSURIZED NORMAL AND HELD STABLE PRESSURE. PACK 2 REINSPECTED AND FOUND NO OTHER LEAKS. NO ECAM MSGS. REVIEWED MAINT PERFORMED WITH TOMC AND OK TO RETURN TO SERVICE.

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