Service difficulty report · Beam · Boeing 7377H4

Difficulty date
February 10, 2023
Submitted
March 13, 2023
Operation
Air carrier
Aircraft
N277WN
Make and model
Boeing 7377H4
Aircraft serial
32531
Aircraft time
51,901 hours, 31,206 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

MAIN CABIN AFT WET AREA FLOOR BEAM UPPER SURFACE CORROSION AT STA 986.5 RBL 5'-44'<[01] REMOVED CORROSION AT MAIN CABIN AFT WET AREA FLOOR BEAM UPPER SURFACE STA 986.5 AND BETWEEN RBL 5' TO 44' REF SRM 51-10-02-0G-0;[02] VERIFIED STEP 1. CORROSION REMOVED STA 986.5;[03] PERFORMED UT THICKNESS INSP ON REWORKED AREA IAW B737 NDT P4 51-00-00 PROC.3 ; MIN THK. NOTED 0.135 AT RBL 43'<BR>TOOL USED : OLYMPUS 27MG B/C 172139 04/23;[04] THIS REWORKED AREA LOCATED AT MAIN CABIN AFT WET AREA FLOOR BEAM UPPER SURFACE STA 986.5 RBL 5'-44' WAS ACCOMPLISHED ON TASK CARD TTG8Q00HTLCT.;[05] VERIFIED STEP #4.;[06] VERIFIED.

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