What was found
FACE GEAR DAMAGED, ENGINE HAS EXHIBITED DAMAGE TO THE ALTERNATOR DRIVE FACE GEAR (P/N 657984), WHICH DRIVES THE NO. 1 ALTERNATOR. THE DAMAGE HAS INCLUDED VARYING DEGREES OF SPALLING AND GALLING OF THE GEAR TEETH.
- Difficulty date
- July 15, 2026
- Submitted
- October 6, 2026
- Operation
- General aviation
- Make and model
- Cirrus SR22T
- Engine
- Cont TSIO550K
- Engine time
- 259 hours
- System (JASC)
- 8520 · Reciprocating Engine Power Section
- Part
- Drive Gear
- Part number
- 657984
- Condition
- Spalled
- Location
- Engine
- Part time
- 259 hours
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.