Service difficulty report · Structure · Boeing 7377H4

Difficulty date
October 4, 2022
Submitted
November 3, 2022
Operation
Air carrier
Aircraft
N210WN
Make and model
Boeing 7377H4
Aircraft serial
34162
Aircraft time
59,036 hours, 35,216 cycles
Part
Structure
Condition
Corroded
Location
Zn 100 Fus Lower
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 INNER CHORD UPPER SURFACE B.S.951-992.8 RBL. 45'-55' W.L. 208. (51-014) / [01] REMOVED CORROSION ON AFT WET AREA INNER CHORD UPPER SURFACE B.S 951-992.8 RBL 45'-55' WL 208 AS PER B737 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 0.049'<BR>TOOL USED : OLYMPUS 27MG B/C 172139 CAL DUE:04/23;[04] PERFORMED UT THICKNESS NOTED 0.049 MATERIAL REMOVED 0.031'FOUND TO BE OUT OF LIMITS AS PER B737-700 SRM 53-70-15-1A-1;[05] RECEIVED NEW PART AND LOCATED AND DRILLED NEW HOLES AT NEW PART SRM 51-40-05-0G-0;[06] VERIFIED STEPS #4 AND #5. OK TO TREAT AND PRIMER AT HOLES.;[07] TREATED AND PRIMER NEW HOLES AT NEW INNER CHORD AMM 52-21-72-370--801 AND 51-21-41-701;[08] VERIFIED STEP #7.;[09] LATE ENTRY: INSTALLED EWIS AT AFT WET AREA STA 927 TO STA 1016;[10] CORRECTION FOR STEP 9: LATE ENTRY: INSTALLED EWIS AT AFT WET AREA STA 927 TO STA 1016 AS PER B737-700 AMM 20-60-07-913-801;[11] LATE ENTRY: REMOVED INNERCHORD AT AFT WET AREA R-2 DOOR SILL BETWEEN STA 912 AND STA 1006 APPROX. AND RBL 55 WL 208 AS PER B737-700 SRM 51-40-02-0G-0;[12] VERIFIED STEP 11<BR>OK TO INSTALL NEW INNER CHORD ON THE R/H SIDE;[13] PARTIAL INSTALLATION INNER CHORD AT AFT WET AREA RH SRM 51-40-02-0G-0;[14] INSTALLED R/H INNER CHORD AT AFT WET AREA AS PER B737-700 SRM 51-40-02-0G-0;

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