Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
February 14, 2023
Submitted
March 13, 2023
Operation
Air carrier
Aircraft
N289CT
Make and model
Boeing 7377H4
Aircraft serial
36633
Aircraft time
50,940 hours, 30,659 cycles
Part
Intercostal
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

FWD WET AREA INTERCOSTAL BS 277-294 BL 0; WL 208 IS CRACKED<[01] EVALUATED CRACK AT DISCREPANCY AREA WAS FOUND TO BE OUT OF LIMITS DUE TO NO LIMITS ARE GIVEN IN THE SRM; PART REPAIRABLE BY REPLACEMENT PER SRM 51-10-02-0G-0 PARAGRAPH 9.;[02] REMOVED FWD WET AREA INTERCOSTAL FROM BS-277 - BS-294; BL-0; WL-208 P/N 141A5410-3 PER SRM 51-40-02-0G-0;[03] VERIFIED CORRECTIVE ACTION STEPS 1 AND 2.;[04] LOCATED AND DRILLED NEW INTERCOSTAL P/N:141A5410U3AAR PO#899637 PER SRM 51-40-05-0G-0. OK TO INSTALL;[05] VERIFIED CORRECTIVE ACTION STEP 4. VERIFIED OK TO INSTALL.;[06] INSTALLED NEW INTERCOSTAL P/N:141A5410U3AAR PO#899637 AT BS-277 - BS-294; BL-0; WL=208 PER SRM 51-40-02-0G-0 DWG#141A5410;[07] VERIFIED CORRECTIVE ACTION STEP 6.;[08] VERIFIED MEASUREMENT TABLE AND TASK CARD COMPLETE.

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