Service difficulty report · Intercostal · Boeing 7377H4

Difficulty date
October 12, 2022
Submitted
November 9, 2022
Operation
Air carrier
Aircraft
N201LV
Make and model
Boeing 7377H4
Aircraft serial
29854
Aircraft time
59,586 hours, 35,374 cycles
Part
Intercostal
Condition
Cracked
Location
Zn 100 Fus Lower
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 FOUND AT INTERCOSTAL BS 946 RBL 20 WL 160 / [01] CRACKED AT INTERCOSTAL BS 946 RBL 20 WL 160 P/N 147A7580-22; FOUND TO BE OUT LIMITS DUE TO NO ALLOWABLE DAMAGE IN SRM; IT WILL BE REPAIRABLE BY REPLACEMENT I.A.W SRM 51-10-02-0G PAR 9C .;[02] FABRICATED; LOCATED AND DRILLED NEW INTERCOSTAL MADE FROM 7075T6#0.032' LOT#1483073-1 AT BS927 TO BS 947 RBL 20 WL 160 I.A.W SRM 51-40-05-0G-0 AND DWG 147A7500 ;APPLIED CHEMICAL CONVERSION COATING I.A.W SRM 51-20-01-0G-0. AND OK TO PRIME.;[03] VERIFIED CORRECTIVE ACTION 1 AND 2;[04] APPLIED PRIMER BMS10-11 TY CLAS A ON NEW INTERCOSTAL MADE FROM 7075T6#0.032' LOT#1483073-1 AT BS927 TO BS 947 RBL 20 WL 160 I.A.W SRM 51-20-01-0G-0. AND OK TO INSTALL.;[05] VERIFIED CORRECTIVE ACTION ITEM 4; OK TO INSTALL.;[06] INSTALLED INTERCOSTAL AT ACB BS927 TO BS 947 RBL 20 IAW 737-700 SRM 51-40-02-0G-0; DWG 147A7500.-;[07] RII VERIFIED CORRECTIVE ACTION ITEM 6.;[08] VERIFIED CORRECTIVE ACTION ITEM 6; AND MEASUREMENT FIELDS; CARD COMPLETE.

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