Service difficulty report · Beam · Boeing 7377H4

Difficulty date
December 30, 2022
Submitted
January 31, 2023
Operation
Air carrier
Aircraft
N213WN
Make and model
Boeing 7377H4
Aircraft serial
34217
Aircraft time
58,853 hours, 35,162 cycles
Part
Beam
Part number
NOTREPORTED
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. AT AFT WET AREA FLOOE SUPPORT BEAM UPPER CAP FASTENERS HOLES LBL-24 TO LBL45 STA 986.5 MKD DOTS<[01] REMOVED FASTENER (1EA) AT FLOOR BEAM STA 986.5 LBL 45 FOR ACCESS TO CORROSION REMOVAL PER REF SRM 51-40-02-0G-0.;[02] REMOVED CORROSION AT FLOOR BEAM UPPER CAP STA 986.5 LBL24 TO LBL45 PER RE SRM 51-10-02-0G-0.;[03] VERIFIED STEP 1 AND 2;[04] PERFORMED UT THICKNESS INSP ON REWORKED AREA IAW B737 NDT P4 51-00-00 PROC.3 ; MIN THK. NOTED 0.115 <BR>TOOL USED : OLYMPUS 27MG B/C 172139 04/23;[05] PERFORMED UT THICKNESS INSP ON REWORKED AREA IAW B737 NDT P4 51-00-00 PROC.3 ; MIN THK. NOTED ON LBL -45 AROUND THE HOLE IS 0.087 <BR>TOOL USED : OLYMPUS 27MG B/C 172139 04/23;[06] CORROSION ON LBL 45 AROUND FASTENER HOLE IS WORKED ON TTG8Q00H0A7M;[07] CORROSION OUT OF LIMITS ON LBL 45 AROUND FASTENER HOLE. WORKED ON TTG8Q00H0A7M;[08] VERIFIED STEPS 6 AND 7;[09] EVALUATED REWORKED AREA OF STA 986.5 LBL 24 TO LBL 44 FOUND WITHIN LIMITS AS PER EA M-21-153-00612 / 8694806 CUSTOMER CARD TTG8Q00H1LDL;[10] ACCOMPLISHED EA M-21-153-00612 / 8694806 ON CUSTOMER CARD TTG8Q00H1LDL;[11] VERIFIED STEPS 9 AND 10.

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