Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
July 6, 2023
Submitted
August 9, 2023
Operation
Air carrier
Aircraft
N965WN
Make and model
Boeing 7377H4
Aircraft serial
36677
Aircraft time
38,362 hours, 23,630 cycles
Part
Intercostal
Part number
UNKNOWN
Condition
Cracked
Location
Zn 200 Fus Top
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 BS291 BL0 WL208.<[01] VERIFIED APPLICABILITY FOR SRM 53-10-51-1A-1 ALLOWABLE DAMAGE 1.;[02] CRACK FOUND TO BE OUT OF LIMITS PER SRM 53-10-51-1A-1; PAR. 4.B.(1).(A). FIG. 105; DETAIL A.<BR>REMOVED INTERCOSTAL FROM BS277 - BS294; WL208; BL0 PER SRM 51-40-02-0G-0.<BR>RECEIVED FROM; TOOL ROOM NEW INTERCOSTAL P/N 141A5410U3.<BR>LOCATED AND DRILLED PER SRM 51-40-05-0G-0 AND BOEING DWG 141A5400; OK TO INSTALL.;[03] MEASUREMENTS TABLE UPDATED.;[04] VERIFIED CORRECTIVE ACTION #1; #2.<BR>VERIFIED OK TO INSTALL NEW INTERCOSTAL.;[05] INSTALLED INTERCOSTAL BETWEEN BS277 - BS294; WL208; BL0 PER SRM 51-40-02-0G-0 AND BOEING DWG. 141A5400.;[06] VERIFIED CORRECTIVE ACTION #5.;[07] VERIFIED MEASUREMENTS.

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