Service difficulty report · Floorbeam · Boeing 7378H4

Difficulty date
June 21, 2023
Submitted
July 19, 2023
Operation
Air carrier
Aircraft
N8543Z
Make and model
Boeing 7378H4
Aircraft serial
63587
Aircraft time
19,500 hours, 9,726 cycles
Part
Floorbeam
Part number
UNKNOWN
Condition
Corroded
Location
Zn 100 Fus Lower
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 ON FLOOR BEAM BS 947 RBL 50 WL 208.<[01] VERIFIED APPLICABILITY OF SRM 53-70-51-1A-1 ALLOWABLE DAMAGE 1;[02] EVALUATED CORROSION ON BS 947 FLOORBEAM UPPER FLANGE AT RBL 50 WL 208 IN AN AREA OF .8' X .6' LOWEST REMAINING MATERIAL THICKNESS .125; CORROSION FOUND TO BE OUT OF LIMIT PER SRM 53-70-51-1A-1. USING TOOL ID: ATS2473 DUE: 08/2023;[03] VERIFIED CORRECTIVE ACTION ITEM 1-2.;[04] DISCREPANCY REPAIRED ON COSTUMER CARD# TTG8Q00LSY1R. TASK COMPLETED;[05] VERIFIED COMPLETION OF CORRECTIVE ACTIONS 4 AND MEASUREMENT TABLE;[06] TASK COMPLETE

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