Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
November 27, 2021
Submitted
December 27, 2021
Operation
Air carrier
Aircraft
N455WN
Make and model
Boeing 7377H4
Aircraft serial
32462
Aircraft time
58,698 hours, 34,771 cycles
Part
Intercostal
Condition
Cracked
Location
Cabin
Stage of operation
UK
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 CABIN INTERCOSTAL; BS 277-290; RBL 1; WL 208 (MARKED) ; / [01] REMOVED DAMAGED INTERCOSTAL FROM BS 277 TO BS 294 ; RBL 1 ; WL 208 IAW B737 SRM 51-40-02-0G-0.; [02] LOCATED AND DRILLED INTERCOSTAL AT FLOOR STRUCTURE BS 277 TO BS 290 RBL 1 WL 208 PER SRM 51-40-05 AND DWG 141A5400; [03] OK TO INSTALL; [04] VERIFIED LOCATE AND DRILL OF NEW CABIN INTERCOSTAL; BS 277-290; RBL 1; WL 208; PER SRM 51-40-05 AND DWG 141A5400; [05] OK TO INSTALL; [06] EVALUATED INTERCOSTAL AT FLOOR STRUCTURE BS 277 TO BS 290 RBL 1 WL 208 FOUND OUT LIMITS DUE TO CRACK EXCEEDS THE ALLOWED DIMENSIONS IAW SRM 53-10-51-1A 1 ALLOWABLE DAMAGE 1 FIGURE 105 TOOL USED CALIPER ID:ATS2502 DUE DATE:04/2022; [07] INSTALLED NEW INTERCOSTAL AT FLO

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