Service difficulty report · Floorbeam · Boeing 7378H4

Difficulty date
November 29, 2021
Submitted
January 11, 2022
Operation
Air carrier
Aircraft
N8621A
Make and model
Boeing 7378H4
Aircraft serial
36917
Aircraft time
27,526 hours, 12,424 cycles
Part
Floorbeam
Condition
Corroded
Location
Fuselage
Stage of operation
UK
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

FLOOR BEAM HAS CORROSION B.S. 947.5 LBL 25. ; / [01] CORROSION DAMAGE ON CABIN FLOOR BEAM AT STA. 947.5; LBL 25' IS OUT OF LIMITS PER SRM 53-70-51-1A-1.; [02] VERIFIED CORROSION DAMAGE ON CABIN FLOOR BEAM AT STA. 947.5; LBL 25' IS OUT OF LIMITS PER SRM 53-70-51-1A-1.; [03] UPPER CHORD OF STA. 947.5 FLOOR BEAM AT LBL 25' REPAIRED SRM 53-70-51-2R-5. SEE FAULT TTG8Q009K4DJ FOR ALL REPAIR ACTIONS ACCOMPLISHED.; [04] UPPER CHORD OF STA. 947.5 FLOOR BEAM AT LBL 23 TO BE REPAIRED PER SRM 53-70-51-2R-5 ON FAULT TTG8Q009K4DJ.; [05] CORRECTIVE ACTION #4 HAS INCORRECT LBL NUMBER. CORRECTION: UPPER CHORD OF STA. 947.5 FLOOR BEAM AT LBL 25 TO BE REPAIRED PER SRM 53-70-51-2R-5 ON FAULT TTG8Q009K4DJ; [06] VERIFIED CORRECTIVE ACTION #4 HAS INCORRECT LBL NUMBER. CORRECTION: UPPER CHORD OF STA. 947.5 FLOOR BEAM AT LBL 25 TO BE REPAIRED PER SRM 53-70-51-2R-5 ON FAULT TTG8Q009K4DJ; [07] REPAIRED UPPER CHORD ON CABIN FLOOR BEAM AT STA. 947.5 FROM RBL 59' TO LBL 59' PER SRM 53-70-51-2R-5; ALTERNATIVE 1 AND EA 21-153-03565; WIP 1-3. SEE PREVIOUS CORRECTIVE ACTIONS FOR INDIVIDUAL WORK ACCOMPLISHED IN CONJUNCTION WITH CORRECTIVE ACTIONS ON FAULT TTG8Q009K4DJ.

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