Service difficulty report · Floorbeam · Boeing 7378H4

Difficulty date
May 24, 2022
Submitted
June 10, 2022
Operation
Air carrier
Aircraft
N8630B
Make and model
Boeing 7378H4
Aircraft serial
42521
Aircraft time
27,694 hours, 12,732 cycles
Part
Floorbeam
Part number
147A550429
Condition
Corroded
Location
Floor
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 UPPER CHORD OF FLOORBEAM BS 947 RBL49 WL 208 / [01] VERIFIED APPLICABILITY PER SRM 53-70-51-1A-1 ALLOWABLE DAMAGE 1 PAR.4.H.(2)(B) FIGURE 104/ALLOWABLE DAMAGE 1 DETAIL C;[02] REMOVED CORROSION ON BS947 RBL49 WL208 2'X1' ORIGINAL MATERIAL THICKNESS IS .150' REMAINING MATERIAL THICKNESS IS .120' DAMAGE FOUND TO BE OUT LIMITS I.A.W SRM 53-70-51-1A-1 ALLOWABLE DAMAGE 1 PAR.4.H.(2)(B) FIGURE 104/ALLOWABLE DAMAGE 1 DETAIL C.;[03] VERIFIED CORRECTIVE ACTIONS 1 AND 2.;[04] DAMAGE ON BS947 RBL49 WL208 TO BE REPAIRED ON COSTUMER CARD TTG8Q00CMNLQ I.A.W SRM 53-70-51-2R-5 REPAIR 5 ALTERNATIVE 2 FIG 206.;[05] VERIFIED CORRECTIVE ACTION 4

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