Service difficulty report · Floorbeam · Boeing 7378

Difficulty date
July 14, 2026
Submitted
August 20, 2026
Operation
Air carrier
Aircraft
N8706W
Make and model
Boeing 7378
Aircraft serial
42559
Aircraft time
22,122 hours, 10,105 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

BS 947 FLOORBEAM HAS PITTING AND CORROSION AT RBL 51. REMOVED CORROSION ON THE FLOORBEAM UPPER TEE, MEASURED CORROSION REMOVAL TO BE 0.070" DEEP REMAINING THICKNESS IS 0.110" (ORIGINAL THICKNESS IS 0.180") THE FLOORBEAM UPPER TEE OUT OF LIMITS IAW SRM 53-70-51-1A-1. RII INSPECTED REMOVAL OF FLOOR BEAM "T" CHORD AT STA. 947 RBL 64 TO LBL 64. PERFORMED DETAILED VISUAL INSPECTION OF THE CUT EDGE IAW SRM 53-70-51-2R-5. NO DEFECTS NOTED. TREATED & PRIMED CUT EDGES OF FLOORBEAM PER SRM 53-70-51-2R-5. RII INSPECTED AS REQUIRED CORRECTIVE ACTION #3 APPLIED FILLET SEAL AND FILLED ALL INTERNAL GAPS TO REPAIR AREAS IAW SRM 53-70-51-2R-5.

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