Service difficulty report · Unknown · Boeing 777224

Difficulty date
June 25, 2023
Submitted
June 28, 2023
Operation
Air carrier
Aircraft
N78002
Make and model
Boeing 777224
Aircraft serial
27578
Aircraft time
111,895 hours, 11,726 cycles
Part
Unknown
Part number
285W00271
Part serial
D00056
Condition
Inoperative
Location
Zmu 3
Part time
803,874 hours, 716,926 cycles
Stage of operation
CL
How discovered
O
Nature of condition
O
Precautionary procedure
A

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

What was found

DUE TO RETURN TO FIELD FOR ALL 3 LAV TANKS SHOWING FULL PLEASE A CP THE FOLLOWING: MAKE SURE THE VACUUM BLOWER CB''S ARE IN P110 Z 1, P210 Z1. ACP BITE CHECK OF ALL 3 LCM''S AMM 38-33-00-501. INSP ECT TANK FOR BROKEN VACUUM OR VENT LINES SEE IPC38-32-07-001 ITE M 230, MAKE SURE NO TEARS IN END CAPS OR COUPLINGS. IF NO FAULTS FOUND REPLACE LIQUID SEPERATOR FILTERS ON ALL 3 TANKS PER AMM 3 8-32-02 AND LEAK CHECK ALL VACUUM CONNECIONS AND OPERATION OF VA C BLOWERS. IADLM CIFFERELLO 703-661-4936 CARRIED BY ELB REPLACED ALL THREE TANKS LIQUID SEPERATOR FILTERS, REF AMM 38-33-00-740-801. ALSO CHECKED ALL LINES NO DEFECTS NOTED. 74-3832-3-0011,QTY :1 76-3832-3-0017,QTY :1 76-3832-3-0082,QTY 38-32-02. HAD ALL 3 TANKS SERVICED AND FLUSHED OUT WITH LEAVING INCLUDING REPLACED ZMU 3 AND UPDATED ZMU 3 DATABASE, WHICH IS :1 25-3832-3-0018,QTY :1 99-3832-3-0058,QTY :1 6 GALLONS IN EACH TANK. LEVEL SENSORS SHOWING LEVEL. TESTED LCMS MAIN COMMUNICATOR FOR LCMS FOR TANKS, NO FAULTS NOTED AFTER 40-0608-3-0366,QTY :1 25-2339-9-0002,QTY :1 BITE TEST FOR ALL 3 TANKS, NO FAULTS NOTED. REF AMM REPLACEMENT, REF AMM 23-39-04. PARTS USED: ROTABLE PARTS CHANGE WAS INDICATED - TT # 1954177 SN OFF 0056 UNIT, ZONE MANA OFF 25-2339-9-0002 0056 ON 25-2339-9-0002 1396