# SDR 2004FA0000280

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 26, 2004
- Submitted: March 17, 2004
- Operation: General aviation
- Aircraft: [N1240W](https://openairdocs.org/aircraft/N1240W), registered now
- Make and model: Urocop EC120B
- Registry model: [Urocop EC120B](https://openairdocs.org/model/eurocopter-ec120b) (OpenAirDocs)
- Aircraft serial: 1240
- Engine: Tmeca ARRIU2F
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Plug
- Part number: 7052A3652038
- Condition: Loose
- Location: Gearbox
- Stage of operation: TX
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2004FA0000280

## Discrepancy

PILOT STARTED ENGINE, COMPLETED CHECKLIST AND (BEEPS) IN HEADSET AND VISUAL WARNING ON CAUTION PANEL OF MAIN GEAR BOX (LOW OIL PRESSURE).  SHUT DOWN ENGINE AND OPENED COWL, TRANSMISSION FILLED WAS COVERING BOTH ENGINE DECK AND TRANSMISSION DECK.  DISCOVERED THAT THE BLANKING PLUG HAD COME LOOSE FROM TRANS INPUT FLANGE CAUSING LOSS OF TRANS FLUID.  THIS (LOOSE BLANKING PLUG) ADDRESSED IN ALERT SB 63-003, WHEN THIS EVENT HAPPENS IT IS NOT JUST A SMALL LEAK WITH MINOR CONSEQUENCES, BUT A MAJOR LEAK, EMPTYING THE TRANSMISSION WITHIN A SHORT PERIOD CAUSING A POWER REDUCTION IAW FLIGHT MANUAL, A RUN ON LANDING, OR POSSIBLE CRASH.

---
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.