Service difficulty report · Floorbeam · Boeing 7377H4

Difficulty date
May 17, 2021
Submitted
June 28, 2021
Operation
Air carrier
Aircraft
N207WN
Make and model
Boeing 7377H4
Aircraft serial
34012
Aircraft time
52,378 hours, 31,227 cycles
Part
Floorbeam
Condition
Corroded
Location
Bs 270 Lbl5
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 LATERAL BEAM AT B.S. 270; L.B.L 5; W.L. 207.54. ; / [01] REMOVED CORROSION ON INTERCOSTAL LATERAL AT B.S 270;L.B.L. 5;W.L.207.54. MAX. MAT. LOSS; L=1.0XW=.4XD=0.012 ; ORIGINAL MAT.THICKNESS 0.050; MAT. REMAINING 0.038 FOUN TO BE OUT OF LIMITS IAW SRM 53-10-51-1A-1 STEP 4.C.(2)(A) FIG 105 DETAIL F; [02] VERIFIED CORROSION DAMAGE IS OUT OF LIMITS IAW SRM 53-1--51-1A-1; [03] ACCOMPLISHED REPAIR PER EA M-21-153-00277; [04] VERIFIED ACCOMPLISHMENT OF FLIGHT DECK FLOOR REPAIR ON EA M-21-153-00277; [05] VERIFIED ALL WORK ACCOMPLISHED PER EA M-21-153-00277

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