Service difficulty report · Floorbeam · Boeing 7377H4

Difficulty date
June 22, 2021
Submitted
August 4, 2021
Operation
Air carrier
Aircraft
N940WN
Make and model
Boeing 7377H4
Aircraft serial
36900
Aircraft time
39,596 hours, 24,067 cycles
Part
Floorbeam
Condition
Corroded
Location
Bs 259
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 FOUND ON FLIGHT DECK FLOOR UPPER FLANGE OF BS 259.5; LBL 11 - RBL 11; WL 208 ; / [01] REMOVED FASTENER ON DAMAGED AREA FOR ACCESS I.A.W SRM 51-40-02-0G-0; [02] NO APPLICABILITY ENTRIES FOUND ON SRM <BR>DAMAGE TO BE REMOVE PER SRM 51-10-02-0G-0; [03] REMOVED DAMAGE ON BS 259.5 FLIGHT DECK FLOOR UPPER AFT FLANGE LBL11-RBL11 WL 208.5;22'X1.2' I.A.W SRM 51-10-02-0G-0; [04] VERIFIED CORROSION REMOVED; [05] ET INSPECTED BLEND AND HOLES IAW 737 NDTM PART 6 51-00-00 PROCEDURE 23 AND 16; NO CRACKS NOTED.<BR>UT INSPECTED BLEND IAW 737 NDTM PART 4 51-00-00 PROCEDURE 2; LOWEST THICKNESS = 0.092'<BR><BR>CAL ID ATS1465 N600<BR>CAL ID ATS2031 E650; [06] NO ALLOWABLE LIMITS FOUND ON SRM FOR BS 259.5 FLIGHT DECK FLOOR UPPER AFT FLANGE LBL11-RBL11 WL 208.5 ORIGINAL MAT. THICKNESS IS 0.094' REMAINING MAT. THICKNESS IS 0.092'I.A.W.SRM 53-10-08-0I-3 CONTACTED ENGINEERING FOR REPAIR INSTRUCTIONS. ACCOMPLISHED REPAIR OF UPPER FLANGE OF CHORD AT BS 259.5 LBL 11 TO RBL 11 WL 208 IAW EA# 21-153-01901 AND EA# 21-153-01901-WIP1

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