Service difficulty report · Beam · Boeing 7377H4

Difficulty date
January 5, 2023
Submitted
February 7, 2023
Operation
Air carrier
Aircraft
N209WN
Make and model
Boeing 7377H4
Aircraft serial
32484
Aircraft time
59,684 hours, 35,490 cycles
Part
Beam
Part number
NOTREPORTED
Part serial
NOTREPORTED
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 AFT WET AREA FLOOR BEAM BS986 LBL 29; 32; 35; 38; 41<[01] VERIFIED THE APPLICABILITY OF SRM 53-70-51-0I-1 AND SRM 53-70-51-1A-1;[02] REMOVED CORROSION ON AFT WET AREA FLOOR BEAM BS986 LBL 29 ; 32 ; 35 ; 38 ; 41 ; (5EA) AREAS OF 1.0'X1.0' IAW SRM 51-10-02 ; ORIGINAL THICKNESS IS 0.150' MAXIMUM MATERIAL LOSS 0.105' REMAINING THICKNESS IS 0.045' ; FOUND TO BE OUT OF LIMITS IAW SRM 53-70-51-0I-1 AND SRM 53-70-51-1A-1 <BR>MEASURING TOOL USED :<BR>ID :ATS2473<BR>S/N :UNKNOWN<BR>DATE :08/2022<BR>DUE :08/2023;[03] VERIFIED CORRECTIVE ACTION #1; #2.;INSTALLED BS 986.5 UPPER CHORD FLOOR BEAM REPAIR IAW SRM 51-40-02-0G-0; IAW SRM 53-70-51-2R-4 REPAIR 4 AND IAW EA# 23-153-00088-WIP1.

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