Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
August 6, 2021
Submitted
September 7, 2021
Operation
Air carrier
Aircraft
N755SA
Make and model
Boeing 7377H4
Aircraft serial
27871
Aircraft time
74,723 hours, 44,099 cycles
Part
Stringer
Condition
Corroded
Location
Bs 520 S26l
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

CORROSION ON END OF STRINGER 26 LEFT AT B.S. 520+15; W.L. 152.. ; / [01] UPDATED MEASURING TABLE; [02] REMOVED DAMAGED SECTION OF S-26L BS 500D+10'- 540 AND PERFORMED GVI NO ADDITIONAL DAMAGED FOUND ON REPAIR AREA IAW SRM 53-00-03-2R-1 REP.1;07] UPDATED MEASUREMENT TABLE; [08] CERTIFIED STEPS 1 AND STEP 7; [09] RECEIVED REPAIR STRINGER AND HAT SECTION FABRICATED AT OSS ON SWA PO# 834064 FOR STR AND 834071 FOR HAT SECTION DATED 19 AUG 21 AND 20 AUG 21; [10] VERIFIED CORRECTIVE ACTIONS 6 TO 9; [11] LOCATED DRILLED AND TRIMMED NEW STRINGER REPAIR SECTION FABRICATED FROM 7075-T0 .045 LOT # 1439668-1 HEAT TREATED TO T6 CONDITION ALL ON SWA PO# 834064 HAT REPAIR SECTION FABRICATED FROM 7075-T0 .050 LOT #1442011-1 HEAT TREATED TO T6 CONDITION ALL ON SWA PO# 834071 APPLIED CHEMICAL CONVERSION TO REPAIR PARTS AND REPAIR AREA ALL IAW SRM 51-40-05-0G-0 AND SRM 53-00-03-2R-1 STEPS 4 E F G H AND I OK TO PRIME; [12] VERIFIED CORRECTIVE ACTION ITEM 11 OK TO PRIME; [15] INSTALLED REPAIR PARTS BS 500D+6'-540 S-26L IAW SRM 51-40-02-0G-0 AND DWG 143A3230;143A1215.

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