Service difficulty report · Intercostal · Boeing 737

Difficulty date
August 12, 2022
Submitted
September 7, 2022
Operation
Air carrier
Aircraft
N8648A
Make and model
Boeing 737
Aircraft serial
42531
Aircraft time
27,511 hours, 12,724 cycles
Part
Intercostal
Part number
53420059065
Condition
Cracked
Location
Fwd Wet Area
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

CRACKED INTERCOSTAL AT FWD WET AREA BS344+9 LBL11. / [01] REQUEST NDI TO VERIFY CRACK FREE CONDITION ON INTERCOSTAL AT FWD WET AREA BS344+9 LBL11.;[02] HFEC INSPECTED OPEN HOLES IAW 737 NDTM PART 6 51-00-00 PROCEDURE 16. <BR>NO CRACKS NOTED. <BR>EQUIP USED: <BR>-NORTEC 600 ID: ATS2353 CAL DUE: 01/23 <BR>-MINIMITE ID: ATS1411 CAL DUE: 07/23;[03] UPON FURTHER INVESTIGATION INTERCOSTAL AT FWD WET AREA BS344+9 LBL11 WL 208 WAS FOUND TO BE IN CRACK FREE CONDITION.;[04] HFEC INSPECTED SURFACE AREA IAW 737 NDTM PART 6 51-00-00 PROCEDURE 23.<BR>CRACK NOTED TO BE 0.6'. FOUND ADJACENT TO THE AFT FASTENER HOLE. MARKED ENDS OF CRACK.<BR>EQUIP USED:<BR>-NORTEC 600 ID: ATS2353 CAL DUE: 01/23;[05] UPDATED MEASUREMENT TABLE.;[06] REMOVED CRACKED INTERCOSTAL AT FWD WET AREA BS344+9 LBL11 WL 208 PER SRM 51-40-02.;[07] LOCATED AND DRILLED NEW INTERCOSTAL AT FWD WET AREA BS344+9 LBL11 WL208 PER SRM 51-40-05 AND DWG#141A5400. REQUEST OK TO INSTALL.;[08] VERIFIED ACTION #6-7 OK TO INSTALL GIVEN;[09] INSTALLED INTERCOSTAL AT FWD WET AREA BS344+9 LBL 11 PER SRM 51-40-02-0G-0 AND DWG 141A5400;[10] VERIFIED INSTALLATION OF INTERCOSTAL AT FWD WET AREA BS344+9 LBL 11;[11] RII INSPECTION ACCOMPLISHED;[12] ALL STEPS COMPLETE