What was found
LEFT HORIZONTAL STAB INTERNAL RIB AT STAB STA 111.10 HAS A CRACK AT THE BOTTOM OF THE NR 4 VERTICAL STIFFENER ON THE INBD FACING SIDE OF THE RIB. REPAIRED RIB NO.4 VERTICAL STIFFENER @ STA 111.10 PER B737-900 SRM 55-10-09-2R REPAIR 4.
- Difficulty date
- March 27, 2026
- Submitted
- April 1, 2026
- Operation
- Air carrier
- Aircraft
- N57439
- Make and model
- Boeing 737924ER
- Aircraft serial
- 33534
- Aircraft time
- 52,618 hours, 18,767 cycles
- System (JASC)
- 5511 · Horizontal Stabilizer, Spar/Rib
- Part
- Rib
- Part number
- 182A53033
- 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.