Service difficulty report · Support · Boeing 7377H4

Difficulty date
October 4, 2022
Submitted
November 2, 2022
Operation
Air carrier
Aircraft
N210WN
Make and model
Boeing 7377H4
Aircraft serial
34162
Aircraft time
59,036 hours, 35,216 cycles
Part
Support
Part number
147A8540U7ATSMRO
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 SPOTS ON AFT WET AREA FLOOR SUPPORT INNER CHORD UPPER SURFACE B.S 947.5 - 992.8 LBL. 45'-55' W.L. 208. (51-011) / [01] REMOVED CORROSION SPOTS ON AFT WET AREAS FLOOR SUPPORT INNER CHORD UPPER SURFACE B.S 947.5 -992.8 LBL. 45'-55' W.L. 208 AS PER B737-700 SRM 51-10-02-0G-0-A00248;[02] VERIFIED STEP #1.-;[03] PERFORMED UT THICKNESS INSP ON REWORKED AREA IAW B737 NDT P4 51-00-00 PROC.3 ; MIN THK. NOTED 0.061'<BR>TOOL USED : OLYMPUS 27MG B/C 172139 CAL DUE:04/23;[04] PERFORMED UT THICKNESS ON UPPER INNER CHORD 0.061'. MATERIAL REMOVED 0.019; ORIGINAL MATERIAL 0.080' AND FOUND OUT OF LIMITS AS PER B 737-SRM 53-70-15-1A-1;[05] REMOVED INNER CHORD AT AFT WET AREA L-2 DOOR SILL BETWEEN STA 912 AND STA 1006 APPROX. AND LBL 55 WL 208.1. REF SRM 51-41-02-0G-0;[06] RECIEVED NEW PART AND LOCATED AND DRILLED AS PER B737-700 SRM 51-40-05-0G-0;[07] VERIFIED STEP 6<BR>OK TO INSTALL NEW INNERCHORD L/H SIDE;[08] INSTALLED L/H INNERCHORD AT AFT WET AREA AS PER B737-700 SRM 51-40-02-0G-0;[09] VERIFIED 8

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