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Lockheed 18-56
N631LS is a Lockheed 18-56, a fixed-wing airplane with more than one motor with a piston engine. It has 17 seats. It is registered to an individual in Marion, Montana. The registration is valid: it was issued on May 9, 2014 and expires on May 31, 2027. It holds a standard airworthiness certificate, dated August 6, 1958.
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Flight history: where it flew in the last seven days · follow it on the live map
Aircraft
- Maker
- Lockheed
- Model
- 18-56 · all 18-56s and related versions
- Built of
- aluminiumThe airframe is aluminium: sheet metal over a riveted frame, the way most aircraft have been built since the 1940s. This is how the Lockheed 18 family is built; the FAA does not record construction for each aircraft, and the type certificate data sheet is the authority for this one.
- Serial number
- 2404
- Type
- Fixed-wing, multi-engineFAA type of aircraft code 5 (the FAA's broad category for the airframe). Every aircraft with this code · All codes
- Power
- Piston (reciprocating)FAA type of engine code 1 (what powers it, as the FAA classes engines). Every aircraft with this code · All codes, 2 motors · Wright C9HD SERIES · 1425 hp
- Fuel
- 100LL avgas
- Seats
- 17
- Year built
- Not given
- Cruising speed
- 184 mph
- Transponder code
- A8427E (octal 52041176)
Registration
- Status
- Valid registrationFAA registration status code V (whether the registration certificate is in force). Every aircraft with this code · All codes
- Certificate issued
- May 9, 2014
- Expires
- May 31, 2027
- Last FAA action
- July 28, 2023
- Airworthiness
- StandardFAA airworthiness class code 1 (the kind of airworthiness certificate it flies under and what it is approved for). Every aircraft with this code · All codes · August 6, 1958
- FAA region
- Northwest MountainFAA region code S (the FAA regional office that handles the record). All codes
- FAA record id
- 00591916
Owner as the FAA publishes it
- Name
- Hill Lawrence e
- Type
- IndividualFAA type of owner code 1 (who holds the registration: a person, a company, a trust or a government body). Every aircraft with this code · All codes
- Address
- 3070 Lower Lost Prairie Rd
Marion, MT 59925-9706
Owners can ask the FAA to withhold their name and address from public files. When they do, those fields are blank here as well. How that works.
Documents on file 0
No bills of sale, loans or other documents are indexed against this tail number.
Connections how N631LS links to the rest of the register
- Lockheed 18 13 registered
- Lockheed 197 aircraft on the register
- Built of aluminium · as the model family is built; the register does not record it per aircraft
- Wright C9HD series 20 aircraft with this engine series · 1425 hp
- Marion, MT 42 aircraft registered in this town
- Montana 6,042 aircraft registered
- FAA orders naming the Lockheed 18 21 airworthiness directives
- Failure reports filed on the Lockheed 18 3 reports since 1995
- Approved modifications for the Lockheed 18 156 supplemental type certificates
The whole map of how records connect · these connections as data: /graph/aircraft/N631LS.json.
Records check free · 0 to understand · 4 clear
The public federal record on N631LS, read the way a buyer, lender or insurer reads it: FAA registration, prior tail numbers keyed on the serial number, reuse of the tail number, recent registry filings, and the NTSB accident record under this and every earlier registration.
Valid registration to Hill Lawrence e, an individual, certificate issued May 9, 2014, expires May 31, 2027. No fractional interest recorded. [1]
Standard certificate; the FAA file gives no certificate date and no manufacture year. [1]
No earlier tail number is recorded against serial 2404 for this model in the deregistered file. [2]
No other airframe has carried N631LS according to the deregistered file. [2]
No bills of sale, loans or releases have reached the registry in recent weeks. The index covers only recent filings; older liens are in the records file. [3]
No NTSB investigation records located under N631LS. CLEAR means the query ran and returned nothing, not that nothing ever happened. [4]
These live in the FAA aircraft records file (every document ever filed against the aircraft) and, for larger aircraft, the International Registry. Part of the full report.
AD compliance against the logbooks and flight-activity reconciliation are researched layers of the full report.
- FAA Releasable Aircraft Database, master file, file of November 5, 2026. registry.faa.gov/
- FAA deregistered aircraft file (part of the same download), file of November 5, 2026. registry.faa.gov/
- FAA document index: registry documents received in recent weeks, file of November 5, 2026. registry.faa.gov/
- NTSB aviation accident database (CAROL), records through October 28, 2026. data.ntsb.gov/carol-main-public/basic-search
This automated check reads the public federal record. Nothing here is a legal opinion, an appraisal or a statement about the aircraft's condition; a CLEAR line is a statement about the searched record, not the aircraft.
Source: FAA Civil Aviation Registry, Releasable Aircraft Database, November 5, 2026. See this record on the FAA site · This record as data