Service difficulty report · Floor Support · Boeing 7378H4

Difficulty date
June 23, 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
Floor Support
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 SUPPORT BS 949 RBL 51 WL 208<[01] VERIFIED APPLICABILITY PER SRM 53-70-51-1A-1 ALLOWABLE DAMAGE 1;[02] EVALUATED CORROSION ON FLOOR SUPPORT STA 949; RBL 51; WL 208 1'X0.600' INCH LOWEST MATERIAL REMOVED IS 0.040' ADJACENT TO ORIGINAL MATERIAL THICKNESS 0.080' FOUND TO BE OUT LIMITS I.A.W SRM 53-70-51-1A-1 ALLOWABLE DAMAGE 1 PAR 4.C(2) (A) FIGURE 104/ALLOWABLE DAMAGE 1 DETAIL E<BR>TOOLS USED ON CORRECTIVE ACTION 2<BR>ATS2738<BR>S/N A22004095<BR>DUE 04/2024;[03] LOCATED AND DRILLED NEW FLOOR SUPPORT BS946-BS 967 RBL 51 WL 208 I.A.W SRM 51-40-05-0G-0 AND BOEING DWG 147A5650. INTERCOSTAL BEING REMOVED AND TO BE INSTALL ON COSTUMER CARD TTG8Q00LSY1R STEP 5<BR>COMPLETED TASK;[04] VERIFIED CORRECTIVE ACTIONS 3;[05] MISSING FAILURE TYPE AND MEASUREMENT TABLE WILL BE CAPTURED ON [TTG8Q00LX996]

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