SDR SWAA2025112638943

Service difficulty report · Rib · Boeing 7378H4

Difficulty date: November 23, 2025
Submitted: November 26, 2025
Operation: Air carrier
Aircraft: N8307K
Make and model: Boeing 7378H4
Aircraft serial: 36987
Aircraft time: 44,410 hours, 20,970 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

RT HORZONTAL STAB LEADING EDGE RIB AT HSS 244.72 HAS A CRACK. ACCOMPLISHED HFEC INSPECTION OF THE DAMAGED AREA, CRACK VERIFIED IAW NDT MANUAL PART 6; 51-00-00, PROCEDURE 23. RT REMOVABLE HORIZONTAL LEADING EDGE REMOVED AND REPLACED IAW AMM 27-41-21.

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