Service difficulty report · Floorbeam · Boeing 7378

Difficulty date
May 14, 2026
Submitted
July 14, 2026
Operation
Air carrier
Aircraft
N8705Q
Make and model
Boeing 7378
Aircraft serial
42558
Aircraft time
21,339 hours, 9,887 cycles
Part
Floorbeam
Condition
Corroded
Location
Zone 200
Stage of operation
IN
How discovered
V
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

FWD WET AREA FLOORBEAM BS 328, RBL 40, AFT FLANGE CORROSION ON UPPER SURFACE ADJACENT TO RIVET HEAD. BLENDED CORROSION ON UPPER CHORD; AFT FLANGE OF THE TRANSVERSE FLOORBEAM AT BS 328, RBL 40 IAW SRM 51-10-02. REMOVED .027 OF MATERIAL. REMAINING THICKNESS IS .098. DAMAGE REMOVAL IS OUT OF LIMITS IAW SRM 53-10-51-1A-1. REMOVED CORROSION ON UPPER CHORD; AFT FLANGE OF THE TRANSVERSE FLOOR BEAM AT STA. 328; RBL 40' PER SRM 51-10-02. REMOVED .027' OF MATERIAL. REMAINING THICKNESS IS .098'. DAMAGE REMOVAL IS OUT OF LIMITS PER SRM 53-10-51-1A-1. WORK C/W EA 26-153-01365-WIP1 AND WIP2.

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