Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
July 12, 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 PASSENGER CABIN BS380+14 RBL9 WL208.<[01] FOUND CRACK ONLY AT UPPER ANGLE OF INTERCOSTAL. SRM DOES NOT HAVE ALLOWABLE DAMAGE LIMITS FOR CRACKED ANGLE. OUT OF LIMITS. REMOVE AND REPLACE IAW SRM 51-10-02-0G-0 STEP #9.;[02] REMOVED ANGLE FROM INTERCOSTAL AT PASSENGER CABIN BS 380- BS 400 RBL 9 WL 208 PER SRM 51-40-02-0G-0.;[03] RECEIVED FROM TOOL ROOM NEW ANGLE P/N 143A5410-170 S/N BN 392604. LOCATED AND DRILLED NEW ANGLE PER SRM 51-40-05-0G-0 AND DWG 143A5400. REQUEST OK TO INSTALL.;[04] VERIFIED CORRECTIVE ACTION #3.<BR>VERIFIED OK TO INSTALL NEW INTERCOSTAL.;[05] INSTALLED NEW ANGLE AT PASSENGER CABIN BS 380- BS 400 RBL 9 WL 208 PER SRM 51-40-02-0G-0.;[06] CORRECTIVE ACTION 5. INSTALLED NEW ANGLE AT PASSENGER CABIN BS 380- BS 400 RBL 9 WL 208 PER SRM 51-40-02-0G-0 AND DWG 143A5400.;[07] VERIFIED CORRECTIVE ACTION #6.;[08] VERIFIED MEASUREMENTS.

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