Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
August 24, 2022
Submitted
September 26, 2022
Operation
Air carrier
Aircraft
N496WN
Make and model
Boeing 7377H4
Aircraft serial
32478
Aircraft time
59,797 hours, 35,569 cycles
Part
Intercostal
Condition
Corroded
Location
Fuselage
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

FWD WET AREA INTERCOSTAL BETWEEN STA 270 T0 STA 294.5;LBL 12 HAS CORROSION. / [01] CLEANED CORROSION AS PER B737-700 SRM 51-10-02-0G-0;[02] PERFORMED UT THICKNESS INSP ON REWORKED AREA IAW B737 NDT P4 51-00-00 PROC.3 ; MIN THK. NOTED 0.048'<BR>TOOL USED : OLYMPUS 27MG B/C 172139 04/22;[03] REMOVED INTERCOSTAL FOR REPLACEMENT AS PER B737-700 51-40-02-0G-0;[04] VERIFIED STEP#3;[05] LATE ENTRY <BR>PART VERIFIED OUT OF LIMITS AS PER DWG# 141A5650;[06] VERIFIED STEP#5 REF./ TO NDT./INSP RETURN INFO.& DRWING NOTES.;[07] RECEIVED NEW PART P/N: 141A5650U3; PO# 1772343; BN: 239959 AND LOCATED AND DRILLED AS PER B737-700 SRM 51-20-07-0G-0; 51-40-05-0G-0; AND DWG#141A5650.;[08] VERIFIED STEP# 7 / VERIFIED NEW PART AT ALL HOLES NO FAULTS EXIST AFTER DRILL PROCES VIA NDT.;[09] INSTALLED NEW NUT-PLATES AT FWD WET AREA INTERCOSTAL BETWEEN STA 270 TO STA 294.5; LBL 12 IN REF TO B737-700 SRM 51-40-10-2R-0.;[10] VERIFIED STEP 9;[11] OK TO INSTALL NEW INTERCOSTAL BETWEEN STA 270 T0 STA 294.5;LBL 12;[12] INSTALLED NEW INTERCOSTAL ;LBL BETWEEN STA 270 TO STA 294.5 LBL 12 REF SRM 51-40-02-0G-0;[13] VERIFIED STEP 12 INSTALLED NEW INTERCOSTAL ;LBL BETWEEN STA 270 TO STA 294.5 LBL 12

More about the Boeing 737-7H4