Service difficulty report · Stringer · Boeing 737*

Difficulty date
October 5, 2021
Submitted
November 11, 2021
Operation
Air carrier
Aircraft
N788SA
Make and model
Boeing 737*
Aircraft serial
30603
Aircraft time
68,361 hours, 40,407 cycles
Part
Stringer
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 STRINGER AT AREA AFT OF FCB BS540 S-25R WL155. MARKED ; / [01] PERFORMED CUT OUT STRINGER 25R FCB AT BS 500D+ 10 TO BS 540 WL 155 IAW SRM 53-00-03-2R-1; [02] VERIFIED PERFORMED CUT OUT STRINGER 25R FCB AT BS 500D+ 10 TO BS 540 WL 155 IAW SRM 53-00-03-2R-1; [03] REQ HFEC CUT OUT FOR FREE CRACK CONDITION STR 25R FCB AT BS 500D+10 IAW SRM 53-00-03-2R-1; [04] HFEC INSPECTED IAW B737 NDTM P6; 51-00-00 PROC 23. NO CRACKS FOUND. TOOL ID IS000450; N500; [05] FORMED -2 CHANNEL (1EA) AND -3 ANGLE (2EA) FROM MATERIAL 7075TO - 0.040' CLAD LOT# 1468510-2 IAW SRM 53-00-03-2R-1 REPAIR 1 AND WIP1 21-153-03049; [06] VERIFIED CORRECTIVE ACTION 5.; [07] REPAIRED STR 25R PER EA 21-153-03049 AND SRM 53-00-03-2R-1; [08] VERIFIED REPAIRED STR 25R PER EA 21-153-03049 AND SRM 53-00-03-2R-1