# SDR 2026FA0000526

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 17, 2026
- Submitted: June 17, 2026
- Operation: General aviation
- Aircraft: N9YENT
- Make and model: Agusta AW139
- Registry model: [Agusta AW139](https://openairdocs.org/model/agustawestland-philadelphia-aw139) (OpenAirDocs)
- Aircraft serial: 41368
- Aircraft time: 10,714 hours, 24,628 cycles
- Engine: Pwc PT6C67C
- System (JASC): [5610 · Flight Compartment Windows](https://openairdocs.org/jasc/5610)
- Part: Windshield
- Part number: 3G5610V00151
- Part serial: 19276H8563
- Condition: Cracked
- Location: Zone 100
- Part time: 854 hours, 2,124 cycles
- Stage of operation: LD
- How discovered: V
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026FA0000526

## Discrepancy

CREW REPORTED THAT UPON LANDING A “POP” SOUND WAS HEARD. SUBSEQUENT MULTIPLE CRACKS OBSERVED ON THE LT HEATED GLASS WINDSHIELD COMMENCING FROM AROUND THE BOTTOM RIGHT CORNER OF THE WINDSHIELD PROPAGATING VERTICALLY UPWARDS AND HORIZONTALLY LEFT ACROSS THE BOTTOM OF THE WINDSHIELD. CREW PROCEEDED TO CONTINUE WITH THE LANDING PHASE.  ON SHUTDOWN A PHYSICAL CHECK WAS CONDUCTED TO DETERMINE THE CAUSE OF CRACK. NO EVIDENCE OF FOREIGN OBJECT DEBRIS IMPACT WAS OBSERVED ON THE WINDSHIELD. NO UNUSUAL VIBRATION WAS RECORDED. CREW REPORTED AIRCRAFT SPEED WAS 5 KNOTS.   LT HEATED GLASS WINDSHIELD WAS REMOVED AND REPLACED WITH A SERVICEABLE WINDSHIELD. REFERENCE LOGBOOK ENTRY (LBE) 172/26.  	LT HEATED GLASS WINDSHIELD OPERATIONAL TEST CARRIED OUT, SATISFACTORY. REFERENCE LOGBOOK ENTRY (LBE) 172/26.  OEM INFORMED OF OCCURRENCE AND TECHNICAL QUERY RAISED FOR THE OCCURRENCE, PSE/TQ/2026/247315.
BCL HAS REQUESTED A STRIP REPORT FROM THE OEM/ VENDOR ON POTENTIAL CAUSE/ FINDINGS.  THIS LT HEATED GLASS WINDSHIELD WAS REPLACED ON 16 OCTOBER 2025 DUE TO SIMILAR OCCURRENCES. WINDSHIELD CANNIBALIZED FROM ANOTHER A/C.         9Y-ENT ACTT 9860.3FHRS ON INSTALLATION. COMPONENT TOTAL TIME CALCULATED FROM INSTALLATION ON 9Y-ENT.

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