What was found
CUSTOMER REPORTED MAIN ROTOR GEARBOX HYDRAULIC PUMP P/N: D500-1 WAS LEAKING AROUND THE CASE (HOUSING). UPON DISASSEMBLY P/N: WHT-81 RETAINING RING WAS MISSING BETWEEN SEALS P/N: C966-7.
- Difficulty date
- January 13, 2021
- Submitted
- January 25, 2021
- Operation
- General aviation
- Filed by
- YV3R012M
Robinson Helicopter Company Inc - Make and model
- Robsin R44RAVENII
- Aircraft serial
- 11902
- Aircraft time
- 2,156 hours
- Engine
- Lyc IO540AE1A5
- System (JASC)
- 2913 · Hydraulic Pump (Electric/Engine), Main
- Part
- Pump
- Part number
- D5001
- Part serial
- 2809
- Condition
- Leaking
- Location
- M/R Gearbox Hyds
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- K
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.