Service difficulty report · Floorbeam · Boeing 7378H4

Difficulty date
March 25, 2022
Submitted
April 20, 2022
Operation
Air carrier
Aircraft
N8628A
Make and model
Boeing 7378H4
Aircraft serial
42384
Aircraft time
27,196 hours, 12,448 cycles
Part
Floorbeam
Part number
147A550429
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 UNDERSIDE OF FWD UPPER FLANGE OF 947 FLOORBEAM; LBL 53; WL 208. / [01] REMOVED CORROSION ON TOP AND UNDERSIDE ON FWD FLANGE OF 947 FLOORBEAM; LBL 53; WL 208. AREA BLENDED ON TOP IS 1' BY 1'; AREA BLENDED ON BOTTOM IS 1' BY 1.4'; OVERSIZED FLOOR PANEL HOLE TO .387' PER SRM 51-10-02-0G-0; SRM 51-40-05-0G-0; SRM 51-40-02-0G-0.;[04] MAX MATERIAL REMOVED ON BLENDED AREAS WAS .010' FROM .180'; OUT OF LIMITS DUE TO FLOOR PANEL HOLE OVERSIZED TO .387' WITH EDGE MARGINE .5' PER SRM 53-70-51-1A-1.;[05] VERIFIED CORRECTIVE ACTION 4.;[06] RECEIVED FREEZE PLUG FROM OSS; CUSTOMER RO NO 862797-SWA OK TO INSTALL;[07] OK TO INSTALL ALL REPAIR PARTS;[08] VERIFIED CORRECTIVE ACTION ITEM 6. OKAY TO INSTALL FREEZE PLUG IS GIVEN.;[09] OKAY TO INSTALL REPAIR PARTS GIVEN FOR CORRECTIVE ACTION ITEM 7.;[10] INSTALLED ALL REPAIR PARTS IAW SRM 51-40-02-0G-0 AND WIP1;[11] VERIFIED CORRECTIVE ACTIONS STEP 10.;[12] COMPLETED ALL REPAIR ON TTG8Q00BMFFV EA 22-153-00999-WIP1 AND TTG8Q00BTRQ7 EA 22-153-00999 WIP2;[13] COMPLETE

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