# SDR 2026FA0000287

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 23, 2026
- Submitted: April 23, 2026
- Operation: General aviation
- Aircraft: N9YTKD
- Make and model: Agusta AW139
- Registry model: [Agusta AW139](https://openairdocs.org/model/agustawestland-philadelphia-aw139) (OpenAirDocs)
- Aircraft serial: 41398
- Aircraft time: 8,570 hours, 18,940 cycles
- Engine: Pwc PT6C67C
- System (JASC): [5610 · Flight Compartment Windows](https://openairdocs.org/jasc/5610)
- Part: Windshield
- Part number: 3G5610V00251
- Part serial: 20261H6725
- Condition: Cracked
- Location: Zone 200
- Part time: 8,570 hours, 18,940 cycles
- Stage of operation: HO
- How discovered: V
- Nature of condition: O
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026FA0000287

## Discrepancy

ON 22 APRIL 2026 AT 1:56PM, THE CREW REPORTED WHEN TRANSITIONING INTO HOVER A "POP" SOUND WAS HEARD.  SUBSEQUENTLY MULTIPLE VERTICAL CRACKS WERE OBSERVED ON THE R/H HEATED GLASS WINDSHIELD COMMENCING FROM THE BOTTOM LEFT CORNER OF THE WINDSHIELD TO THE TOP.  NO EVIDENCE WAS OBSERVED OF ANY FOREIGN OBJECT IMPACTING THE WINDSHIELD.  UPON NOTICE OF THIS OCCURRENCE, CREW INFORMED FLIGHT OPERATIONS CENTRE OF INCIDENT. RETURN TO BASE, WITH NO NOTED FURTHER DISCREPANCIES. TIME IN SERVICE OF THE R/H HEATED GLASS WINDSHIELD COULD NOT BE DETERMINED AT THIS TIME. (AIRCRAFT TIME AND CYCLES USED, UNTIL CONFIRMATION OF INSTALLATION)  OEM INFORMED OF THE OCCURRENCE AND A TECHNICAL QUERY RAISED. REFERENCE PSE/TQ/2026/239540. REPLACEMENT RH HEATED WINDSHIELD ORDERED. R/H HEATED GLASS WINDSHIELD CRACKED IN HOVER, SAME TO BE REPLACED. REFERENCE LOGBOOK ENTRY (LBE) 087/26. OPERATIONAL TEST CARRIED OUT SATISFACTORY. REFERENCE LOGBOOK ENTRY (LBE) 087/26.

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