Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
April 11, 2023
Submitted
May 17, 2023
Operation
Air carrier
Aircraft
N958WN
Make and model
Boeing 7377H4
Aircraft serial
36673
Aircraft time
38,993 hours, 23,664 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

FOUND CRACK ON INTERCOSTAL COMMON TO FASTENER HOLE AT BS 353.5 WL 208 LBL 11<[01] UPDATED MEASUREMENT TABLE;[02] REMOVED INTERCOSTAL FOR ACCESS AT BS344-360 WL208.5 RBL2 PER SRM 51-40-02-0G-0;[03] REMOVED INTERCOSTAL AT BS 344-360 WL208 LBL11 PER SRM 51-40-02-0G-0;[04] LOCATED HOLES IN INTERCOSTAL AT BS 344-360 WL208 LBL11 PER SRM 51-40-06-0G-0 AND DRAWING # 141A5400 SHT 46 REV A;[05] OK TO INSTALL INTERCOSTALS AT BS 344-360 WL208 LBL11 AND BS344-360 WL208.5 RBL2;[06] CORRECTION TO STEP 4 PRIER TO LOCATING HOLES RECIEVED NEW INTERCOSTAL PO # 914766;[07] VERIFIED CORRECTIVE ACTIONS #4; #5 AND #6<BR>OK TO INSTALL INTERCOSTALS AT BS 344-360 WL208 LBL11 AND BS344-360 WL208.5 RBL2 GIVEN<BR>MEASUREMENT TABLE VERIFIED;[08] CORRECTION TO STEP 2; SHOULD HAVE READ BL0 NOT RBL2;[09] CORRECTION ALSO TO STEP 5 SHOULD HAVE READ BL0 NOT RBL2. INSTALLED INTERCOSTALS AT BS 344-360 WL208 LBL11 AND BS344-360 WL208.5 BL0 PER SRM 51-40-02-0G-0 AND DRAWINGS 141A5400 SHT 32 REV-;141A5400 SHT 46 REV A;[10] VERIFIED CORRECTIVE ACTION #9;[11] THE TASK CANNOT BE COMPLETED BECAUSE THERE IS AT LEAST ONE PART INSTALLATION THAT HAS NOT BEEN COMPLETED.;[12] UPDATED PARTS JOB COMPLETE;[13] VERIFIED PARTS REQUIREMENTS

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