# N51BA: Ralph Knight ELITE

- Status: Valid registration
- Airframe: [Ralph Knight ELITE](https://openairdocs.org/model/ralph-knight-elite) (registry code 05639Y4, 2 seats)
- Serial number: E657
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Certificate issued: March 2, 2021
- Expires: March 31, 2028
- Mode S code: A65F30
- Registered owners: [Davidson Brent V](https://openairdocs.org/faa-owner/DAVIDSON%20BRENT%20V), [Lewis Ace E](https://openairdocs.org/faa-owner/LEWIS%20ACE%20E)
- Location: [San Francisco, CA](https://openairdocs.org/faa-place/CA/San%20Francisco)
- Owner type: Partnership
- Owner's area on the map: 37.7981° N, 122.4646° W: Placed by OpenAirDocs at the center of ZIP code 94129, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=51BA
- Page: https://openairdocs.org/aircraft/N51BA

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination.

## ADs that may apply (OpenAirDocs): 0 in force

### Matched by airframe (Ralph Knight ELITE)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N51BA.

## FAA accident and incident reports

None matched to N51BA.

## Reports on N51BA not matched to an aircraft (2)

They name N51BA, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [Incident 19990303015789I](https://openairdocs.org/incident/19990303015789I), Mar 3, 1999: Emb EMB110P1 (N51BA), Buffalo, NY, Minor damage. On March 2, 1999, at 22:00 EST, an Embraer, Emb-110P1, N51BA, s/n 110.404, operated by business air, inc., experienced grinding noises while landing at…
- [Incident 19990109004999I](https://openairdocs.org/incident/19990109004999I), Jan 9, 1999: Emb EMB110P1 (N51BA), Buffalo, NY. (-5)On Saturday, January 9, 1999 at 2230 EST, an Embraer 110, N51BA, flight 323, operated by bennington aviation, reported having problems with the landing…

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## Service difficulty reports on N51BA not matched to an aircraft (1)

They name N51BA, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [SDR 20000424AP042](https://openairdocs.org/sdr/20000424AP042), Mar 3, 1999: WHEEL. CRACKED. WHILE REPORTING FROM UPS RAMP TO FBO RAMP IN BUF A GRINDING NOISE WAS HEARD WHEN TURNING AIRCRAFT WHILE TAXIING. THE NOSE WHEEL HALF BROKE LEAVING THE AXLE BOLT

## STCs that may be installed (OpenAirDocs)

None matched to this aircraft's models.

## Earlier aircraft with N51BA

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N51BA before.

- [Cancelled 1984-02-25](https://openairdocs.org/deregistered/N51BA-1984-02-25): Bates P51-D-75, S/N DB2. Owner: [Bates Donnie R](https://openairdocs.org/faa-owner/BATES%20DONNIE%20R), [Kansas City, MO](https://openairdocs.org/faa-place/MO/Kansas%20City)

## Related

- Other Ralph Knight ELITE aircraft: https://openairdocs.org/model/ralph-knight-elite/aircraft.md

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