Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
March 17, 2022
Submitted
April 19, 2022
Operation
Air carrier
Aircraft
N472WN
Make and model
Boeing 7377H4
Aircraft serial
33831
Aircraft time
58,559 hours, 34,804 cycles
Part
Intercostal
Condition
Cracked
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 B.S. 294.5 - 312; R.B.L. 15; W.L. 208.1. / [01] REMOVED INTERCOSTAL AT BS294.5 - BS 312 RBL 15 WL 208.1 IAW SRM 51-40-02;[02] SRM 51-10-51-0I-2 FOR IDENTIFICATION AND SRM 53-10-51-1A-1 FOR ALLOWABLE DAMAGE ARE APPLICABLE;[03] EVALUATED CRACK AT DISCREPANCY AREA; FOUND TO BE OUT OF LIMITS PER SRM 53-10-51-1A-1 PARAGRAPH 4.B. FIGURE 103; DETAIL A;[04] LOCATED AND DRILLED NEW INTERCOSTAL ITEM #141A5410U146; PO#862802/1 PER SRM 51-40-05-0G-0; OK TO INSTALL NEW INTERCOSTAL;[05] VERIFIED CORRECTIVE ACTIONS 1-4; OK TO INSTALL;[06] INSTALLED NEW INTERCOSTAL AT B.S.294.5 - B.S.312 R.B.L.15;W.L.208.1 ITEM#141A5410U146; PO#862802/1 PER SRM 51-40-02-0G-0; DWG#141A5400;[07] VERIFIED CORRECTIVE ACTION #6;[08] VERIFIED TASK COMPLETE

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