Service difficulty report · Floorbeam · Boeing 7377H4

Difficulty date
October 4, 2022
Submitted
November 2, 2022
Operation
Air carrier
Aircraft
N210WN
Make and model
Boeing 7377H4
Aircraft serial
34162
Aircraft time
59,036 hours, 35,216 cycles
Part
Floorbeam
Part number
147A550611
Condition
Corroded
Location
Zn 200 Fus Top
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

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

What was found

CORROSION SPOTS ON AFT WET AREA FLOOR BEAM UPPER CAP B.S. 986.5 LBL 38'-44' W.L. 208.(51-010) / [01] FOUND AFT WET AREA FLOOR BEAM UPPER CAP B.S. 986.5 LBL. 38'-44' W.L.208. TO BE EXFOLIATED OUT OF LIMITS AS PER B737-700 SRM 53-70-51-1A-1;[02] CORRECTION: FOUND PREVIOUSLY BLENDED CORROSION AT AFT WET AREA FLOOR BEAM UPPER CAP STA 986.5; LBL 38'-44' OUT OF LIMITS. ORIGINAL THICKNESS 0.150'; MATERIAL REMOVED 0.070' MATERIAL REMAINING 0.070' OUT OF LIMITS RE F53-70-51-1A-1 TOOL USED MICROMETER B/C165543 DUE DATE 09SEP23;[03] CORRECTION: FOUND PREVIOUSLY BLENDED CORROSION AT AFT WET AREA FLOOR BEAM UPPER CAP STA 986.5; LBL 38'-44' OUT OF LIMITS. ORIGINAL THICKNESS 0.150'; MATERIAL REMOVED 0.070' MATERIAL REMAINING 0.080' OUT OF LIMITS RE F53-70-51-1A-1 TOOL USED MICROMETER B/C165543 DUE DATE 09SEP23;[04] VERIFIED STEP # 3;[05] CUT AND REMOVED THE DAMAGED FLANGES OF THE UPPER CHORD OF THE FLOOR BEAM STA 986.5 LBL 6.00 TO RBL 50 SRM 53-70-51-2R-4 REPAIR 4;[06] CORRECTION ON STEP 5: CUT AND REMOVED THE DAMAGED FLANGE OF THE FLOOR BEAM AT STA 986 LBL 6.00 TO LT LBL 50 AS PER SRM 53-70-51-2R-4 REPAIR4;[07] VERIFIED STEPS #5 AND # 6;[08] REF TASK CARDS: TTG8Q00FNJCA; TTG8Q00FH0EZ; AND TTG8Q00FFMJ6 (MT-CARD #22-153-03055-WIP1; WIP2; WIP3) FOR WORK ACCOMPLISHMENT. <BR>NO FURTHER ACTION REQUIRED.;[09] VERIFIED STEP 8

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