Service difficulty report · Beam · Boeing 7377H4

Difficulty date
January 6, 2023
Submitted
February 10, 2023
Operation
Air carrier
Aircraft
N214WN
Make and model
Boeing 7377H4
Aircraft serial
32486
Aircraft time
59,300 hours, 35,194 cycles
Part
Beam
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

FLOOR BEAM 986.5 IS CORRODED ON TOP CAP 6 INCHES INBOARD OF R-2 DOOR SILL<[01] FOUND EXFOLIATE CORROSION AROUND FASTENER HOLE; OUT OF LIMITS PER SRM;53-70-51-1A-1;[02] REMOVED INTERCOSTAL BETWEEN STA. 986.5 AND STA. 1006 AND RBL 38; AND ATTACH ANGLES; PER REF SRM 51-40-02-0G-0[12] LOCATED AND DRILLED; NEW T CHORD P/N 53100011-002 PO# 1792296 REF. EA NO. 13-01967;[13] CORRECTION STEP 12; ENTER IN ERROR.;[14] AFT CABIN FLOOR BEAM 986.5 REPAIR AREA; FOUND HOLES STANDARD SIZE AND DRILLED TO THE NEXT OVERSIZE AS PER SRM 51-40-05-0G-0 AND SRM 53-70-51-2R-4 REPAIR 4.;[15] AFT CABIN FLOOR BEAM 986.5 REPAIR AREA; FOUND ANGLE @ STA 967 & STA 986 WITH NO DISCREPANCIES NOTED AND DOES NOT INTERFERE WITH THE REPAIR AS PER SRM 53-70-51-2R-4 REPAIR 4;[30] INSTALLED REPLACEMENT REPAIR PARTS ON FLOOR BEAM STA 986.5 FROM RBL 27 TO RBL 52 PER RE EA 1-753-22432 REV - AND ATS ER 13-01967;[31] APPLIED FILLET SEAL ON REPAIR AND INTERNAL GAPS; PER REF SRM 51-20-05-0G-0 AND APPLIED PRIMER TO THE FASTENERS HEADS PER REF SOPM 20-41-02;[32] VERIFIED STEP 30 AND 31 INSTALLATION OF REPAIR PARTS; SEALANT AND PRIMER APPLICATION.

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