Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
June 9, 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
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-26L WL152. MARKED ; / [01] REMOVED DAMAGED S-26L SECTION AT BS 500D+10'-540 AND PERFORMED GVI NO ADDITIONAL DAMAGED FOUND IAW SRM 53-00-03-2R-1.; [02] VERIFIED DAMAGE REMOVAL AND PERFORMED GVI NO ADDITIONAL DAMAGED FOUND IAW SRM 53-00-03-2R-1.; [03] HFEC INSPECTED CUT END OF STRINGER PER NDTM PART 6; 51-00-00 PROCEDURE 23. NO CRACKS NOTED.<BR>CAL ID: ATS1465 S/N: 60004150296; [04] COMFORMED NEW S26L SECTION MAT. USED 7075 T6 CLAD 0.045' LOT#1439668-1 RO.827277-SWA. AND SPLICE MAT USED 7075 T6 CLAD 0.050' LOT#1442011-1 RO.827276-SWA. VERIFIED HEAT TREATMENT AND FABRICATION IAW BAC 5602;DWG 143A3241 AND SRM 53-00-03-2R-1; LOCATED AND DRILLED; APPLIED CHEMICAL CONVERSION COATING IAW SRM 53-00-03-2R-1.; [05] VERIFIED NEW S26L SECTION MAT. USED 7075 T6 CLAD 0.045' LOT#1439668-1 RO.827277-SWA. [06] APPLIED PRIMER ON REPAIR PARTS AND REPAIR AREA BS 500D+6' - 540 S26L IAW SRM 53-00-03-2R-1. OK TO INSTALL.; [07] VERIFIED PRIMER APPLICATION TO THE REPAIR PARTS AN AIRCRAFT STRUCTURE PER SRM 53-00-03-2R-1. OK TO INSTALL STR REPAIR AT BS500D + 6' TO BS540;

More about the Boeing 737-7H4