Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
July 6, 2023
Submitted
August 15, 2023
Operation
Air carrier
Aircraft
N229WN
Make and model
Boeing 7377H4
Aircraft serial
32498
Aircraft time
58,665 hours, 35,024 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 TOP ANGLE BS 380-400 LBL 14 WL 208.<[01] REMOVED CRACKED INTERCOSTAL TOP ANGLE BS 380-400 LBL 14 WL 208 PER SRM 51-40-02-0G-0 4.E.; SRM 51-40-02-0G-0 7.D.(6) & BOEING DRAWING 143A5400.;[02] UPDATED MEASUREMENT TABLE;[03] UPON FURTHER INVESTIGATION PART HAS NO ALLOWABLE DAMAGE PER SRM 50-10-02-0G-0 STEP 9. AND WILL REQUIRE REPLACEMENT.;[04] UPON FURTHER INVESTIGATION PART HAS NO ALLOWABLE DAMAGE PER SRM 51-10-02-0G-0 STEP 9. AND WILL REQUIRE REPLACEMENT.;[05] VERIFIED CORRECTIVE ACTION ITEMS 1-4.;[06] RECEIVED; LOCATED AND DRILLED NEW ANGLE LOT # 1534988-1 CUSTOMER RO NO: 930122-SWA IAW SRM 51-40-05 AND DWG 143A5400 REV: A.;[07] VERIFIED CORRECTIVE ACTIONS 6<BR>OK TO PRIMER AND CHEMICAL CONVERSION APPLICATION GIVEN;[08] APPLIED CHEMICAL CONVERSION COATING AND PRIMER ON NEW INTERCOSTAL TOP ANGLE BS 380-400 LBL 14 WL 08 IAW SRM 51-20-01 AND AMM 51-21-72-370-804;(OK TO INSTALL;[09] VERIFIED COMPLETION OF CORRECTIVE ACTIONS 8<BR>OK TO INSTALL INTERCOSTAL GIVEN;[10] INSTALLED NEW INTERCOSTAL TOP ANGLE BS 38-400 LBL 14 WL 208 LOT # 1534988-1 CUSTOMER RO NO: 930122-SWA. IAW SRM 51-40-02 AND DWG 141A5400 REV:A;[11] VERIFIED COMPLETION OF CORRECTIVE ACTIONS 10.;[12] APON FURTHER INVESTIGATION PART HAS NO ALLOWABLE DAMAGE PER SRM 51-10-02-0G-0 STEP 9. AND WILL REQUIRE REPLACEMENT. REMOVED & INSTALLED NEW INTERCOSTAL TOP ANGLE BS 38-400 LBL 14 WL 208 LOT # 1534988-1 CUSTOMER RO NO: 930122-SWA. IAW SRM 51-40-02 AND DWG 141A5400 REV:A

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