SDR 9WGA2026052225805

Service difficulty report · Shear Tie · Boeing 74747UF

Difficulty date: May 19, 2026
Submitted: May 22, 2026
Operation: Air carrier
Aircraft: N258SN
Make and model: Boeing 74747UF
Aircraft serial: 29258
Aircraft time: 94,698 hours, 15,226 cycles
System (JASC): 5322 · Fuselage Internal Mounting Structure
Part: Shear Tie
Part number: 69B14644U3
Condition: Cracked
Location: Zone 100
Stage of operation: IN
How discovered: V
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

DURING HEAVY CHECK, CRACK FOUND ON THE CENTER TANK STA 1000 FRONT SPAR SHEAR TIE LBL 11.33, (NR 041072, SEQ 872). REMOVED AND REPLACED SHEAR TIE AT CENTER TANK STA. 1000 FRONT SPAR LBL 11.33, IAW B747-400 SRM 51-40-02 AND REQUIREMENTS SERVICE BULLETIN 747-53A2904, DATED 06, 2020, THIS CORRECTIVE ACTION CLOSES SDR.

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