SDR SWAA2025112029022

Service difficulty report · Rib · Boeing 7378H4

Difficulty date: October 27, 2025
Submitted: November 20, 2025
Operation: Air carrier
Aircraft: N8623F
Make and model: Boeing 7378H4
Aircraft serial: 36731
Aircraft time: 39,409 hours, 19,063 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

CRACK RIB LOCATED LE HSS 105.26 LT HORIZONTAL STAB. REPLACED RIB IAW SRM 51-10-02, ITEM 9, SRM 51-40-02, AND DWG 186A1001, SHEET 19, REV-, DUE TO NO ALLOWABLE DAMAGE FOUND IN SRM IAW SRM 55-10-09-1A-1, ALLOWABLE DAMAGE 1. MEASUREMENT OF CRACK IS:0.5500 INCH.

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