What was found
CUSTOMER SHEAVE, LOWER RECEIVED FOR WARRANTY. AFTER EVALUATION, BASE MATERIAL (ALUMINUM) WAS FOUND TO HAVE CORROSION, WHICH CAUSED BUBBLING BETWEEN ALUMINUM AND METALIZED COATING MATERIAL.
- Difficulty date
- May 27, 2021
- Submitted
- September 1, 2021
- Operation
- General aviation
- Filed by
- YV3R012M
Robinson Helicopter Company Inc - Aircraft
- N14GG
- Make and model
- Robsin R22
- Aircraft serial
- 4583
- Aircraft time
- 1,794 hours
- Engine
- Lyc O360J2A
- System (JASC)
- 6300 · Main Rotor Drive System
- Part
- Sheave
- Part number
- A4931
- Part serial
- LOT142A
- Condition
- Defective
- Part time
- 334 hours
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.