# SDR UIEA2020032000499

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 19, 2020
- Submitted: March 20, 2020
- Operation: Air carrier
- Aircraft: [N407KZ](https://openairdocs.org/aircraft/N407KZ), registered now
- Make and model: Boeing 747-4KZF
- Registry model: [Boeing 747-4KZF](https://openairdocs.org/model/boeing-747-4kzf) (OpenAirDocs)
- Aircraft serial: 36134
- Aircraft time: 44,044 hours, 8,322 cycles
- System (JASC): [5210 · Passenger/Crew Doors](https://openairdocs.org/jasc/5210)
- Part: Bearing
- Part number: BACB10FK5F10HS
- Condition: Damaged
- Location: L1 Door
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2020032000499

## Discrepancy

FOUND L1 DOOR FWD UPPER BEARING DAMAGE.(<P>IAW AMM 52-11-01-735-080 REV. 97, REPLACED L1 DOOR FWD UPPER BEARING ROLLER. CONDITION CHECK NORMAL.</P>)

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