Service difficulty report · Floorbeam · Boeing 7378H4

Difficulty date
December 17, 2020
Submitted
January 6, 2021
Operation
Air carrier
Aircraft
N8606C
Make and model
Boeing 7378H4
Aircraft serial
35964
Aircraft time
27,985 hours, 12,262 cycles
Part
Floorbeam
Part number
147A550429
Condition
Corroded
Location
Pax Cabin
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

PASSENGER COMPARTMENT FLOOR STRUCTURE WL 208.1 STA 947.5 LBL 53, FLOOR BEAM IS CORRODED. REMOVED CORROSION AND VERIFIED LIMITS ON FLOOR BEAM AT STA 947.5 LBL 53 WL 208 ORIGINAL T .180 LOSS: .060 REMAINING T: .120 MAX LOSS ALLOWED .027 'OUT OF LIMITS', IAW SRM 53-70-51-1A-1 ACCOMPLISHED FLOOR BEAM REPAIR AT STA 947.5 FROM BL 0 TO LBL 68.6, IAW SRM 53-70-51-2R-5 P/N 147A5504-29.

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