# SDR QMLA2020031320011

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 11, 2020
- Submitted: March 13, 2020
- Operation: Air carrier
- Aircraft: [N374AL](https://openairdocs.org/aircraft/N374AL), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53819
- Aircraft time: 4,837 hours, 22,135 cycles
- Engine time: 625 hours, 2,605 cycles
- System (JASC): [5302 · Rotorcraft Tail Boom](https://openairdocs.org/jasc/5302)
- Part: Structure
- Part number: 206020113233A
- Condition: Cracked
- Location: Tailboom
- 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/QMLA2020031320011

## Discrepancy

WHILE CONDUCTING SCHEDULED MAINTENANCE, THE MECHANIC FOUND A CRACK ON THE VERTICAL FIN FLANGE THAT MOUNTS THE TAIL ROTOR GEAR BOX COVER TO VERTICAL FIN TOP AFT CORNER. ** THIS AIRCRAFT REMAINS OUT OF SERVICE AT THE TIME OF THIS SUBMISSION PENDING REPAIR. **

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.