Service difficulty report · None · Boeing 7377H4

Difficulty date
August 19, 2022
Submitted
September 27, 2022
Operation
Air carrier
Aircraft
N489WN
Make and model
Boeing 7377H4
Aircraft serial
33855
Aircraft time
57,460 hours, 34,246 cycles
Part
None
Condition
Corroded
Location
Fuselage
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

STA 344 FLOOR BEAM UPPER FLANGE HAS CORROSION COMMON TO FASTENER HOLES AT LBL 11 AND BL 0; WL 208.1. / [01] VERIFIED APPLICABILITY FOR SRM 53-10-51-1A-1<BR>REMOVED CORROSION FROM STA 344 FLOOR BEAM UPPER FLANGE; BEING OUT OF LIMITS; WITH ORIGINAL THICKNESS 0.175'<BR>STA 344 LBL 11 L= 1.300' W= 1' D= 0.043' FOUND OUT OF LIMITS<BR>STA 344 BL 0 L= 2.600' W= 1' D= 0.026' FOUND OUT OF LIMITS<BR>IAW SRM 53-10-51-1A-1<BR>TOOL: DIAL DEPTH GAGE<BR>ID: ATS401<BR>S/N: UNKNOWN<BR>DATE: 10/2021<BR>DUE: 10/2022;[37] INSTALLED INTERCOSTALS AND REPAIR PARTS BETWEEN BS 34 TO BS 360 ; RBL 11; LBL 11 ; LB 0 IAW SRM 53-10-51-2R-10 AND EA 22-153-02676 REV A;[38] VERIFIED CORRECTIVE ACTION 37;[39] VERIFIED CORRECTIVE ACTION STEP 37.;[40] OK TO INSTALL FLOOR

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