# SDR 2026FA0000022

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 19, 2025
- Submitted: January 14, 2026
- Operation: General aviation
- Aircraft: N9YTKB
- Make and model: Agusta AW139
- Registry model: [Agusta AW139](https://openairdocs.org/model/agustawestland-philadelphia-aw139) (OpenAirDocs)
- Aircraft serial: 41395
- Aircraft time: 8,312 hours, 18,358 cycles
- Engine: Pwc PT6C67C
- System (JASC): [5302 · Rotorcraft Tail Boom](https://openairdocs.org/jasc/5302)
- Part: Stabilizer
- Part number: 3G5510A05432
- Part serial: PLY044
- Condition: Cracked
- Location: Leading Edge
- Part time: 10,062 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026FA0000022

## Discrepancy

REFENCES ARE MADE TO SDR UNIQUE CONTROL #2026FA0000017, #2026FA0000018 AND #2026FA0000020 RAISED PREVIOUSLY. #2026FA0000017 - ERRORS WERE MADE WHEN ENTERING THE AIRCRAFT SERIAL NUMBER (9Y-TKB) THIS SHOULD READ "41395" AS CORRECTED, #2026FA0000018 - DIFFICULTY DATE (1/12/2026) THIS IS CORRECT TO 11/19/2025 AND #2026FA0000020 - COMPONENT TT AND TSN WAS CORRECTED TO 10062.47HRS AND ADDITIONAL DETAILS TO INSPECTIONS CARRIED OUT SUBSEQUENTLY. 
SEE DETAILS OF THIS REPORT. DURING A VISUAL INSPECTION OF 9Y-TKB AFTER FLIGHT THE LINE SUPERVISORS DISCOVERED THE CRACK ON THE TAILPLANE ASSEMBLY LEFT LEADING EDGE LOWER PANEL. LOCATION OF CRACK IS ESTIMATED TO BE STA 12370 AND BL (-940 THRU -718). THE CRACK IS APPROXIMATELY 222MM IN LENGTH AND RUNS ALONG THE STATION LINE STA 12370.  A LOGBOOK ENTRY (LBE 206/25) WAS RAISED TO RECORD THIS DEFECT. OEM WAS ENGAGED VIA PSE/TQ/2025/220653 ON 19TH NOVEMBER 2025.  REPLACEMENT OF TAILPLANE ASSEMBLY WAS CARRIED OUT ON RESPECTIVE LOGBOOK ENTRY 206/25.  TALO/379/25 RAISED TO CARRY OUT MAINTENANCE ON TAILPLANE ASSEMBLY IN OVERHAUL SHOP.  A DETAIL INSPECTION WAS CARRIED OUT I.A.W AMP-39-A-55-11-00-00A-31AB-A. NO IMPACT DAMAGE WAS FOUND.  THE AFFECTED TAILPLANE LEFT LEADING EDGE ASSY P/N 3G5510A05731M01 WAS REPLACED.

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