# SDR ZD4R202410040001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 4, 2024
- Submitted: October 4, 2024
- Operation: General aviation
- Filed by: [StandardAero Aviation Holdings Inc, repair station ZD4R696M](https://openairdocs.org/faa-repair-station/ZD4R696M/standardaero-aviation-holdings-inc.md) (OpenAirDocs)
- Aircraft: [N36VA](https://openairdocs.org/aircraft/N36VA), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53472
- Aircraft time: 7,242 hours
- Engine: Allsn 250C47B
- System (JASC): [8300 · Accessory Gearboxes](https://openairdocs.org/jasc/8300)
- Part: Shaft
- Part number: M25010562
- Part serial: UT276141
- Condition: Broken
- Location: Gearbox
- Part time: 237 hours, 464 cycles
- Component: Gearbox, Rroyce
- Component part number: 23063393
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ZD4R202410040001

## Discrepancy

DISASSEMBLED GEARBOX AND FOUND 2 BROKEN TEETH ON TORQUEMETER GEARSHAFT. GEAR TEETH WERE LOCATED AT BOTTOM OF GEARBOX. MINOR METAL DEBRIS FOUND ON MAGNETIC CHIP DETECTORS. MINOR DAMAGE TO GEARBOX COVER AND HOUSING ASSEMBLY.

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