Service difficulty report · Floorbeam · Boeing 7377H4

Difficulty date
January 29, 2020
Submitted
August 25, 2021
Operation
Air carrier
Aircraft
N457WN
Make and model
Boeing 7377H4
Aircraft serial
33856
Aircraft time
55,090 hours, 32,723 cycles
Part
Floorbeam
Condition
Corroded
Location
Bs 497 Rbl 12-21
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*** IN AFT CARGO BAY ON AFT BULKHEAD CENTER PANEL LOWER SUPPORT AT B.S. 947; R.B.L. 12-21; W.L. 155. / DAMAGE ON ACB AFT BULKHEAD LOWER SUPPORT BS 947 BL 21L - 21R WL-155 FOUND TO BE OUT OF LIMITS DUE TO NO LIMIT ON SRM 51-10-02-0G-0 PAR. 9C LOCATED AND DRILLED NEW FLOOR SUPPORT P/N 149A8118-29 IAW SRM 51-40-05-0G-0 AND INSTALLEDE IAW SRM 51-40-02-0G-0 AND BOE DWG # 149A8110.

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