What was found
CUSTOMER SHEAVE, LOWER P/N: A493-1 RECEIVED FOR WARRANTY. AFTER EVALUATION, BASE MATERIAL (ALUMINUM) HAD CORROSION, WHICH CAUSED BUBBLING BETWEEN ALUMINUM AND METALIZED COATING MATERIAL.
- Difficulty date
- May 27, 2021
- Submitted
- September 1, 2021
- Operation
- General aviation
- Aircraft
- N412TL
- Make and model
- Robsin R22BETAII
- Aircraft serial
- 4689
- Aircraft time
- 2,501 hours
- Engine
- Lyc O360J2A
- System (JASC)
- 6300 · Main Rotor Drive System
- Part
- Sheave
- Part number
- A4931
- Part serial
- LOT142A
- Condition
- Defective
- Part time
- 301 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.