Service difficulty report · Floorbeam · Boeing 7378H4

Difficulty date
March 26, 2023
Submitted
April 27, 2023
Operation
Air carrier
Aircraft
N8529Z
Make and model
Boeing 7378H4
Aircraft serial
36974
Aircraft time
19,992 hours, 9,666 cycles
Part
Floorbeam
Condition
Corroded
Location
Zn 200 Fus Top
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 BS 986 FLOOR BEAM; LBL 44; WL 208; AROUND NUTPLATE HOLE.<REMOVED CORROSION ON BS986 LBL44 WL 208 AROUND THE NUTPLATE HOLE ORIGINAL MATERIAL THICKNESS IS 0.150' REMAINING MATERIAL THICKNESS IS 0.120' DAMAGE TO BE FOUND OUT LIMITS I.A.W SRM 53-70-51-1A-1 ALLOWABLE DAMAGE 1 PAR 4.D(2)(A) FIG104/ALLOWABLE DAMAGE 1 DETAIL E <BR>TOOL USED <BR>ATS1671<BR>S/N 65093024<BR>DUE 07/2023<BR>ATS2472<BR>DUE 12/31/2023;[04] OUT LIMIT DAMAGE ON BS 986 FLOOR BEAM; LBL 44; WL 208; AROUND NUTPLATE HOLE TO BE REPAIRED PER SRM 53-70-51-2R-6 REPAIR 6 ALTERNATIVE 3 FABRICATED; LOCATED; DRILLED; APLLIED FLAP PEENING; CHEMICAL CONVERSION COATING AND PRIMER ON REPAIR PARTS AND REPAIR AREA DOUBLER 1EA MATERIAL USED 7075 T6 CLAD 0.100' LOT# 1489800-1 FILLER 1EA MATERIAL USED 7075 T6 CLAD 0.032' LOT#1430478-4 IAW SRM 53-70-51-2R-6 REPAIR 6 ALTERNATIVE 3 TOOL USED E8288 DUE DATE 10/2023. INSTALLED REPAIR PARTS; SEALING AROUND REPAIR AND APPLIED CIC ON REPAIR AREA IAW SRM 53-70-51-2R-6 REPAIR 6 ALTERNATIVE 3.

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