Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
January 25, 2023
Submitted
March 3, 2023
Operation
Air carrier
Aircraft
N955WN
Make and model
Boeing 7377H4
Aircraft serial
36671
Aircraft time
38,739 hours, 23,607 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

CRACK ON FWD PASSENGER CABIN INTERCOSTAL AT LBL 11 BS 344+9.5.<[01] VERIFIED APPLICABILITY FOR SRM 51-10-0G-0<BR>EVALUATED FWD. PASSENGER CABIN INTERCOSTAL AT LBL 11 BS 344+9.5 FOUND INTERCOSTAL SHOULD BE REPAIR BY REPLACEMENT PER 51-10-02-0G-0 PAR. 9.;[02] VERIFIED APPLICABILITY FOR SRM 51-10-0G-0<BR>EVALUATED FWD. PASSENGER CABIN INTERCOSTAL AT LBL 11 BS 344+9.5 FOUND INTERCOSTAL TO BE OUT LIMITS AND SHOULD BE REPAIR BY REPLACEMENT PER 51-10-02-0G-0 PAR. 9.;[03] CERTIFIED CORRECTIVE ACTION 2;[04] VERIFIED CORRECTIVE ACTION #2;[05] REMOVED FWD PASSENGER CABIN INTERCOSTAL AT LBL 11 BS 344+9.5 IAW SRM 51-40-02 AND PARTIAL UPDATE ON STEP 1.;[06] CERTIFIED CORRECTIVE ACTION 5;[07] LOCATED AND MATCH DRILLED NEW INTERCOSTAL IAW SRM 51-40-05 AND BOEING DWG 141A5400.;[08] CERTIFIED CORRECTIVE ACTION 7;[09] OKAY TO INSTALL INTERCOSTAL AT LBL 11 BS 344+9.5.;[10] VERIFIED CORRECTIVE ACTION ITEM 7.<BR>OKAY TO INSTALL NEW INTERCOSTAL.;[11] UPDATED STEP 1;[12] CERTIFIED CORRECTIVE ACTION 11;[13] PROVIDED PARTIAL UPDATE TO STEP 1.;[14] PROVIDED PARTIAL UPDATED TO STEP 1.;[15] INSTALLED NEW INTERCOSTAL AT LBL 11 BS 344+9.5. IAW SRM 51-40-02 AND BOEING DWG 141A5400.;[16] CERTIFIED CORRECTIVE ACTION 15;[17] UPDATED STEP 1;[18] UPDATED STEP 1.;[19] CERTIFIED CORRECTIVE ACTION 17 AND 18;[20] STEPS 1 AND 2 COMPLETE.;[21] STEPS 1;2 ARE COMPLETED.;[22] VERIFIED MEASUREMENTS TABLE.;[23] CERTIFY.

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