Service difficulty report · Floorbeam · Boeing 7378H4

Difficulty date
June 22, 2022
Submitted
July 18, 2022
Operation
Air carrier
Aircraft
N8640D
Make and model
Boeing 7378H4
Aircraft serial
60084
Aircraft time
27,602 hours, 12,670 cycles
Part
Floorbeam
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

CORROSION ON FLOORBEAM UPPER CHORD BS 947 LBL 26 WL 208 / [01] REMOVED LAV D FLOOR MOUNT STA 947; LBL 26; WL 208 FOR ACCESS PER SRM 51-40-02-0G-0.;[02] REMOVED CORROSION ON FLOORBEAM UPPER CHORD STA 947; LBL 26; WL 208; AREA BLENDED IS 2.2' BY 6.7' PER SRM 51-10-02-0G-0.;[03] VERIFIED CORRECTIVE ACTION STEP 2.;[10] FABRICATED REPAIR PARTS; LOCATED AND DRILLED BS947; LBL 46-RBL 51; WL 208 (1) T-CHORD 1EA. MATERIAL USED BAC1505-101045 7075T6511 LOT# 5098198-1; (2) ANGLE 4EA. MATERIAL USED BAC1490-2885 7075T62 LOT#1493588-1; (3) STRAP 4EA. MATERIAL USED 7075T6 0.125' LOT#1469335-1; (1) T-CHORD APPLIED FLAP PEEN TO CUT EDGES IAW SRM 53-70-51-2R-5 REP. 5 ALT.2. PAR 4D-F(2) AND 4G-H.19] INSTALLED REPAIR PARTS ITEM 1 T-CHORD; ITEM 2 ANGLES ; ITEM 3 STRAP AND ITEM 4 FILLER 4(EA) ALL I.A.W SRM 53-70-51-2R-5 REP. 5 ALT.2. PAR 4.L-M

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