Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
May 15, 2023
Submitted
June 20, 2023
Operation
Air carrier
Aircraft
N429WN
Make and model
Boeing 7377H4
Aircraft serial
33658
Aircraft time
66,602 hours, 39,316 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

INTERCOSTAL AT AFT INNER RADIUS IS CRACKED BS 947; RBL 23; WL 165. (MARKED)<[01] REMOVED INTERCOSTAL FROM AFT CARGO BAY BS 927 TO BS 947 RBL 23 WL 165 IAW SRM 51-40-02-0G-0;[02] VERIFY APPLICABILITY PER SRM NOT ALLOWABLE DAMAGE DO NOT HAVE ENTRIES ARE CALLED REPAIRABLE BY REPLACEMENT IAW SRM 51-10-02 STEP 9 C;[03] RECEIVED NEW INTERCOSTAL P/N 147A7500-22 LOT#1524304-2.LOCATED AND DRILLED IAW SRM 51-40-05 AND DWG147A7500.<BR>OK TO INSTALL;[04] CORRECTION IDENTIFICATION SRM 53-70-53-0I-2;[05] VERIFIED CORRECTIVE ACTION ITEMS 2 AND 3. <BR>OKAY TO INSTALL NEW INTERCOSTAL IS GIVEN.;[06] INSTALLED NEW INTERCOSTAL FROM BS 927 TO BS 947 RBL23 WL 165 IAW SRM 51-40-02 AND DWG 147A7500;[07] VERIFIED MEASUREMENT TABLE;[08] VERIFIED CORRECTIVE ACTION 6

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