Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
May 31, 2023
Submitted
July 5, 2023
Operation
Air carrier
Aircraft
N962WN
Make and model
Boeing 7377H4
Aircraft serial
36963
Aircraft time
38,452 hours, 23,554 cycles
Part
Intercostal
Part number
UNKNOWN
Condition
Cracked
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

CRACKED INTERCOSTAL AT FWD CABIN BS344+5 RBL50 WL208.<[01] VERIFIED APPLICABILITY OF SRM 53-10-51-1A-1 ALLOWABLE DAMAGE 1 - SECTION 41 FLOOR STRUCTURE;[02] ACCOMPLISHED EVALUATION ON INTERCOSTAL AT FWD CABIN STA-344+5'' RBL50 WL208 AND FOUND TO BE OUT OF LIMITS IAW SRM 53-10-51-1A-1 PART 4.E FIG.105. <BR>TOOL USED CALIPER ID: ATS2739 S/N: A22004232 DUE DATE:11/2023.;[03] REMOVED INTERCOSTAL IAW SRM 51-40-02-0G-0;[04] LOCATED AND DRILLED NEW INTERCOSTAL IAW SRM 51-40-05-0G-0 AND DWG#141A5400.<BR>OK TO INSTALL.;[05] VERIFIED CORRECTIVE ACTION 4 'LOCATED AND DRILLED NEW INTERCOSTAL IAW SRM 51-40-05-0G-0 AND DWG#141A5400.' <BR>OK TO INSTALL NOT GIVEN DUE TO END OF SHIFT.;[06] UPDATED STEP 1;[07] REQUEST OK TO INSTALL PART;[08] OK TO INSTALL PART;[09] INSTALLED INTERCOSTAL AT FLOOR STRUCTURE BS 344- BS 360 RBL 50 WL 208 PER SRM 51-40-02-0G-0 AND DWG 141A5400;[10] VERIFIED CORRECTIVE ACTION #9;[11] THE TASK CANNOT BE COMPLETED BECAUSE THERE IS AT LEAST ONE PART INSTALLATION THAT HAS NOT BEEN COMPLETED.;[12] UPDATE SELECT PART;[13] VERIFIED STEP 1 COMPLETE; CARD COMPLETE.

More about the Boeing 737-7H4