Service difficulty report · Beam · Boeing 7377H4

Difficulty date
March 8, 2023
Submitted
April 17, 2023
Operation
Air carrier
Aircraft
N220WN
Make and model
Boeing 7377H4
Aircraft serial
32491
Aircraft time
58,003 hours, 34,631 cycles
Part
Beam
Condition
Corroded
Location
Zn 200 Fus Top
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 AROUND FASTENER HOLES AT STA 986.5; FROM RBL 44 TO LBL44; WL 208.1<[01] FOUND DEEP CORROSION EXFOLIATION OF SEVERAL FASTENER HOLES UPPER AND LOWER FLANGE AT FLOOR BEAM STA 986.5 BETWEEN LBL-40 AND RBL-40. 100% MATERIAL LOST. OUT OF LIMITS AS PER SRM 53-70-51-1A-1;[02] CABIN STA 968.5 FROM RBL 44 TO LBL 44; WL 208.1. ACCOMPLISHED PER EA 23-153-00836 ON ITEM TTG8Q00KBMYQ;[03] VERIFIED STEP 1 AND STEP 2.

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