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 BS344+5 RBL12 WL208.<[01] UPDATED MEASUREMENT TABLE;[02] REMOVED INTERCOSTAL AT BS 344- BS360 RBL 12; WL 208 IAW SRM 51-40-02-0G-0;[03] REMOVED INTERCOSTAL AT BS 344- BS 360 BL0 FOR ACCESS ONLY IAW SRM 51-40-02-0G-0;[04] LOCATED AND DRILLED INTERCOSTAL AT BS 344- BS360 RBL 12 WL208 IAW SRM 51-40-05-0G-0; OK TO INSTALL;[05] VERIFIED CORRECTIVE ACTION ITEM 4. OKAY TO INSTALL NEW INTERCOSTAL IS GIVEN.;[06] SRM DOES NOT HAVE REPAIR LIMITS FOR CRACKED INTERCOSTALS. OUT OF LIMITS. REMOVE AND REPLACE IAW SRM 51-10-02-0G-0 STEP #9.;[07] CERTIFY CORRECTIVE ACTION 3 AND 6;[08] REINSTALLED INTERCOSTAL ACCESSED IN ACTION STEP #3 IAW SRM 51-40-02-0G-0;[09] INSTALLED INTERCOSTAL AT BS 344- BS 360 RBL 12 WL 208 IAW SRM 51-40-02-0G-0; DWG 141A5400 SHT 13;[10] UPDATED PART REQUIREMENT;[11] VERIFIED CORRECTIVE ACTION 9;[12] VERIFIED MEASUREMENT TABLE

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