Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
March 30, 2022
Submitted
April 27, 2022
Operation
Air carrier
Aircraft
N475WN
Make and model
Boeing 7377H4
Aircraft serial
32474
Aircraft time
59,744 hours, 35,276 cycles
Part
Intercostal
Part number
143A751034
Condition
Cracked
Location
Fwd Cargo Bay
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

CRACK ON FWD CARGO BAY INTERCOSTAL AT RBL 23 BS 400+1. / [01] REMOVED FCB INTERCOSTAL AT RBL 23 BS 400 - BS 420 I.A.W SRM 51-40-02-0G-0;[02] LOCATED AND DRLLED ON FWD CARGO BAY NEW INTERCOSTAL BS 400 TO BS 420 RBL 23 WL 156 P/N 143A7510-34 LOT#1487853-1 PO#863642/1 IAW SRM 51-40-05 AND DWG143A7505 REV:B. OK TO INSTALL;[03] VERIFIED CORRECTIVE ACTION ITEM 2. OKAY TO INSTALL NEW INTERCOSTAL AT RBL 23 BS 400 - BS 420 GIVEN.;[04] INSTALLED ON FWD CARGO BAY NEW INTERCOSTAL BS 400 TO BS 420 AT RBL 23 WL 156 IAW SRM 51-40-02 AND DWG 143A7505 REV:B.;[05] SRM 53-00-53-1A-2 IA IS APPLICABLE; NO ALLOWABLE DAMAGE PER SRM; PART TO BE REPLACED IAW SRM 51-10-02 PAR.9<BR><BR>LOCATED AND DRLLED ON FWD CARGO BAY NEW INTERCOSTAL BS 400 TO BS 420 RBL 23 WL 156 P/N 143A7510-34 LOT#1487853-1 PO#863642/1 IAW SRM 51-40-05 AND DWG143A7505 REV:B. OK TO INSTALL;[06] UPDATED MEASUREMENTS;[07] VERIFIED CORRECTIVE ACTION ITEMS 4 AND 5. INSTALLATION OF INTERCOSTAL AND SRM APPLICABILITY.

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