What was found
AIRCRAFT IN BASE MAINTENANCE: VERTICAL INTERCOSTAL HAS CORROSION BETWEEN BS 707 AND 807 AND BETWEEN STR 24 L AND 23L. REPLACED INTERCOSTAL IAW AARD 51-00-05-1 AND BOEING DWG 146A7550.
- Difficulty date
- July 6, 2026
- Submitted
- September 16, 2026
- Operation
- Air carrier
- Aircraft
- N904AN
- Make and model
- Boeing 737823
- Aircraft serial
- 29506
- Aircraft time
- 71,361 hours, 29,891 cycles
- System (JASC)
- 5320 · Fuselage Miscellaneous Structure
- Part
- Intercostal
- Part number
- 146A94036
- Condition
- Corroded
- 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.