SDR SWAA2026072024604

Service difficulty report · Rib · Boeing 7377H4

Difficulty date: June 11, 2026
Submitted: July 21, 2026
Operation: Air carrier
Aircraft: N257WN
Make and model: Boeing 7377H4
Aircraft serial: 32515
Aircraft time: 65,106 hours, 39,315 cycles
System (JASC): 5511 · Horizontal Stabilizer, Spar/Rib
Part: Rib
Condition: Cracked
Location: Zone 300
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

RIGHT HORIZONTAL STAB, CRACKED AT INSPAR RIB 4 , STAB STA 120.30, STIFFENER 4 LOWER AREA. REMOVED, REPAIR, AND REINSTALLED RT STAB 4 RIB SS 120.30 IAW SRM 51-40-02-0G-0, SRM 55-10-09-2R-5, REP 5, DWG 182A3001, REV F, DWG 182A4001, REV D, AND DWG 182A1500, REV -.

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