Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
June 22, 2021
Submitted
July 15, 2021
Operation
Air carrier
Aircraft
N489WN
Make and model
Boeing 7377H4
Aircraft serial
33855
Aircraft time
54,253 hours, 32,244 cycles
Part
Intercostal
Condition
Cracked
Location
Fuselage
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 COMMON TO FLOOR PANEL 231KF BS 500D-520 BL 0 WL 208 ; / [01] DAMAGE EVALUATION; NO ENTRIES FOUND ON SRM FOR CRACKS ON INTERCOSTAL BS500D-BS520 BL0 WL208 PART TO BE REPLACED I.A.W SRM 51-10-02-0G-0 PAR 9.C; [02] REMOVED INTERCOSTAL BS500D-BS520 BL0 WL208 I.A.W SRM 51-10-02-0G-0 AND SRM 51-40-02-0G-0; [03] LOCATED AND DRILLED NEW INTERCOSTAL BS500D-BS520 BL0 WL208 I.A.W SRM 51-40-05-0G-0 AND BOEING DWG 143A5400; [04] VERIFIED LOCATE AND DRILL OF INTERCOSTAL AT BS500D-520 BL0. OK TO INSTALL.; [05] INSTALLED NEW INTERCOSTAL BS500D-BS520 BL0 WL208 I.A.W SRM 51-40-05-0G-0 AND BOEING DWG 143A5400; [06] UPDATE REFERENCE INSTALLED NEW INTERCOSTAL BS500D-BS520 BL0 WL208 I.A.W SRM 51-40-02-0G-0 AND BOEING DWG 143A5400; [07] UPDATE REFERENCE INSTALLED NEW INTERCOSTAL BS500D-BS520 BL0 WL208 I.A.W SRM 51-40-05-0G-0 AND BOEING DWG 143A5400; [08] REMOVED AND REPLACED INTERCOSTAL BS500D-BS520 BL0 WL208 I.A.W SRM 51-40-02-0G-0 AND BOEING DWG 143A5400; [09] VERIFIED INTERCOSTAL BS500D-BS520 BL0 WL208 INSTALLATION I.A.W SRM 51-40-02-0G-0 AND BOEING DWG 143A5400; [10] COMPLETE

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