Service difficulty report · Stringer · Boeing 737824

Difficulty date
December 13, 2023
Submitted
January 2, 2024
Operation
Air carrier
Aircraft
N73259
Make and model
Boeing 737824
Aircraft serial
30803
Aircraft time
65,999 hours, 23,919 cycles
Part
Stringer
Part number
146A323344
Condition
Corroded
Location
Sta847
Stage of operation
IN
How discovered
O
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

EVIDENCE OF CORRISION ON STRINGER 25L AT STA 847 IMAGES AT STA 847 ON S-25L REMOVED RIVETS FROM STA 847 TO STA 827 COMMON TO S-25L REF SRM REMOVED HI-LOCKS ON S-25L FROM STATION 847 TO STAION 867 REF. 51-40-02. SRM. 51-40-02 CUT DAMAGED STRINGER MINIMUM AMOUNT TO INSPECT FUSELAGE SKIN FOR CORROSION UNDER NEATH APPROX 9.75" REF SRM 51-40-02 C/W HFEC REF PARA. 4.B. OF SRM 53-00-03-2R-1. NO DEFECTS NOTED. VERIFIED STRINGER CUTS TO BE AT STA. 827 + 7" AND STA. 847 + 7". C/W HFEC REF PARA. 4.B. OF SRM 53-00-03-2R-1. NO DEFECTS NOTED. CUT AND REMOVED DAMAGED SECTION OF STRINGER 25L FROM STA. 827 TO MEET MINIMUM FASTENER REQUIREMENTS FOR INTIAL STRINGER +8" TO STA. 847 +8" REF PARA. 4.B. OF SRM 53-00-03-2R-1. REQUEST THICKNESS OF 0.056"; EXTENDED REMOVED STRINGER SECTION TO STA. INSPECTION TO ACCOMPLISH HFEC INSPECTION TO MAKE SURE ALL DAMAGE 827 +7" AND STA. 847 +7" REF SRM 53-00-03-2R-1. REQUEST HAS BEEN REMOVED. INSPECTION TO ACCOMPLISH HFEC. VERIFIED 2 EA J ANGLES SECTIONS AS 7075-0 .071" THICK. REF SRM VERIFIED MATERIAL FOR STRINGER P/N 146A3233Y44, HAT SECTION P/N 53-00-03-2R-1 REPAIR 1 PARAGRAPH 4, TABLE 202 ITEM 3 FOR HEAT 69-78188-17 AND C SECTION P/N BAC1493-715 PER SRM 53-00-03-2R-1