# N440: 1937 Sikorsky S-43H

- Status: Valid registration
- Airframe: [Sikorsky S-43H](https://openairdocs.org/model/sikorsky-s-43h) (registry code 8140705, 12 seats)
- Engine: [Wright R-1820 series](https://openairdocs.org/engine/wright-r-1820-series) (registry code 67020)
- Serial number: 4327
- Year built: 1937
- Type: Fixed wing multi engine
- Engine type: Reciprocating
- Airworthiness: Standard
- Airworthiness date: April 12, 1993
- Certificate issued: December 28, 2012
- Expires: December 31, 2028
- Mode S code: A54A9C
- Registered owner: [Weeks Kermit A](https://openairdocs.org/faa-owner/WEEKS%20KERMIT%20A)
- Location: [Polk City, FL](https://openairdocs.org/faa-place/FL/Polk%20City)
- Owner type: Individual
- Owner's area on the map: 28.2676° N, 81.8538° W: Placed by OpenAirDocs at the center of ZIP code 33868, within about 8 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=440
- Page: https://openairdocs.org/aircraft/N440

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. The registry lists only the engine series, so ADs for every Wright R-1820 model are included.

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

### Matched by airframe (Sikorsky S-43H)

None in force.

### Matched by engine (Wright R-1820 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N440.

## FAA accident and incident reports

None matched to N440.

## Reports on N440 not matched to an aircraft (3)

They name N440, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [Incident 19790923050599I](https://openairdocs.org/incident/19790923050599I), Sep 23, 1979: Boeing 707/ (N440), Chicago, IL. Right main would not retract due to flat leveling cylinder.
- [Incident 19790420024439I](https://openairdocs.org/incident/19790420024439I), Apr 20, 1979: Boeing 727 (N440), San Antonio, TX. Flight returned due to auxiliary power fire warning light. No evidence of fire.
- [Incident 19780824049359I](https://openairdocs.org/incident/19780824049359I), Aug 24, 1978: Boeing 707/ (N440), Oklahma City, OK, Minor damage. Aircraft landed hard and engine rod dragged on runway.

## 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 N440 not matched to an aircraft (1)

They name N440, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [SDR A6WA201441395](https://openairdocs.org/sdr/A6WA201441395), Apr 4, 2014: RIB. CRACKED. RIGHT ENG EXHAUST FAIRING INNER RIB CRACKED. R & R RIB AT XN214 PN 228-50181-849 IAW CMM 20-40-11 & 20-42-06.

## STCs that may be installed (OpenAirDocs)

None matched to this aircraft's models.

## Earlier aircraft with N440

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N440 before.

- [Cancelled 1929-03-08](https://openairdocs.org/deregistered/N440-1929-03-08): Mill Basin 1W, S/N 5. Owner: [Mill Basin Aircraft Inc](https://openairdocs.org/faa-owner/MILL%20BASIN%20AIRCRAFT%20INC), [Brooklyn, NY](https://openairdocs.org/faa-place/NY/Brooklyn)

## Related

- Other Sikorsky S-43H aircraft: https://openairdocs.org/model/sikorsky-s-43h/aircraft.md
- The Wright R-1820 series engine: https://openairdocs.org/engine/wright-r-1820-series.md

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