What was found
HYDRAULIC PUMP TACH DRIVE COUPLING BRAZED WELDING FAILED CAUSING COUPLING TO SEPARATE FROM DRIVE GEAR SHAFT. MFG SHOULD CHECK THE STRENGTH OF BRAZE AFTER WELDING. WHEN THIS COUPLING FAILS, LOSS OF ROTOR TACH OCCURS. (K)
- Difficulty date
- March 2, 2006
- Submitted
- May 16, 2006
- Operation
- General aviation
- Aircraft
- N37AJ
- Make and model
- Bell 206B
- Aircraft serial
- 1877
- Engine
- Allsn 250C20
- System (JASC)
- 2913 · Hydraulic Pump (Electric/Engine), Main
- Part
- Coupling
- Part number
- 5001908
- Condition
- Separated
- Location
- Hyd Pump
- Component
- Hyd Pump
- Component part number
- 01454430001
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.