Service difficulty report · Flange · Boeing 7378H4

Difficulty date
April 24, 2023
Submitted
May 25, 2023
Operation
Air carrier
Aircraft
N8539V
Make and model
Boeing 7378H4
Aircraft serial
42534
Aircraft time
19,572 hours, 9,642 cycles
Part
Flange
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 ON FORWARD EDGE OF STA 947 FLOORBEAM UPPER FLANGE AT RBL 24.75; FORWARD OF R/H AFT LAV INBOARD; AFT TIEDOWN FITTING<[01] REMOVED TIE DOWN FITTING AT STA 947 RBL 24 TO F.O.M.;[02] REMOVED CORROSION AND FOUND TO BE OUT OF LIMITS PER SRM 53-70-51-1A-1. FAILED LIMITS DUE TO FASTENER EDGE DISTANCE ISSUE.;[03] VERIFIED CORROSION REMOVAL; OUT OF LIMITS;[04] REPAIR PER EA #23-153-01373;[05] C/W INSPECTION.

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