Lockheed 18
13 on the U.S. register across 3 versions the FAA records separately. Built from 1942 to 1952; half of them date from 1943 or earlier. Texas has the most (5). 46% are registered to companies, flight schools, clubs and other organisations; the rest to individuals, who are not named here at this time.
About the 18 from the FAA's model table
- Type
- Fixed-wing, multi-engine · Piston twins
- Power
- Piston (reciprocating), 2 engines
- Common engines
- Wright C9Hd Series (6), Wright C9Gc&D Series (3), Wright 1820F56 (2)
- Seats
- 17
- Cruise speed
- about 184 mph
- Built of
- aluminium
- Maker on the register
- Lockheed
- Registered
- earliest certificate November 22, 2002; newest October 26, 2026
Where they are owner's state
By state, as a table
| aircraft | |
|---|---|
| Texas | 5 |
| California | 2 |
| Alaska | 2 |
| Washington | 1 |
| Virginia | 1 |
| Montana | 1 |
| Mississippi | 1 |
Who owns them registrant type
By owner type, as a table
| aircraft | share | |
|---|---|---|
| Individual | 5 | 38% |
| Corporation | 4 | 31% |
| LLC | 2 | 15% |
| Co-owned | 2 | 15% |
Versions as the FAA records them · click one to list only those aircraft
When they were built by decade · 5 with no year on file
Airworthiness certificate class
Biggest operators companies, schools and clubs
Largest fleets, as a table
| aircraft | |
|---|---|
| Tupelo Aeronautics INC | 1 |
| Snowy LLC | 1 |
| Rassawek Ventures INC | 1 |
| Lone Star Flight Museum | 1 |
| Houston Aeronautical Heritage Society INC | 1 |
| American Airpower Heritage Flying Museum | 1 |
Fleet pages: Tupelo Aeronautics INC · Lone Star Flight Museum · American Airpower Heritage Flying Museum
Accident history NTSB records · 4 cases since 1982, 2 fatal
The 4 most recent of 4 cases where the NTSB's make and model match this family's versions. Each aircraft's own page also shows its record. How this model compares with others, with the fleet taken into account: Accidents by model in Aviation Analytics.
Questions people ask answers refresh every morning
How many Lockheed 18 aircraft are registered in the U.S.?
13 as of October 29, 2026, counting 3 versions the FAA records separately.
Which state has the most Lockheed 18s?
Texas, with 5.
Who owns the Lockheed 18?
46% are registered to companies, flight schools, clubs and other organisations; the rest to individuals and co-owners, who are not named on this site at this time.
When were the Lockheed 18s on the register built?
Between 1942 and 1952; half of them in 1943 or earlier.
How many Lockheed 18 accidents has the NTSB recorded?
4 accidents and incidents since 1982, 2 of them fatal. A model flown more shows more; the accident analytics compare models per thousand registered.
What is the Lockheed 18 made of?
The airframe is aluminium: sheet metal over a riveted frame, the way most aircraft have been built since the 1940s. The FAA's type certificate data sheet is the authority for any one model.
What the FAA has certified, ordered and been told about the Lockheed 18 the component layer
The airframe is aluminium: sheet metal over a riveted frame, the way most aircraft have been built since the 1940s. The design is held under 1 type certificate (A-723, held by Lockheed Martin Aeronautics Company). The FAA has issued 21 airworthiness directives (orders that owners must comply with) that name this model, most of them about other and general. Operators and repair shops have filed 3 failure reports with the FAA since 2002, 3 of them in the last ten years: about 23.1 a year for every 100 aircraft on the register; the system most often named is airframe structure. 156 approved modifications exist for it, the most by Signature Flight Support Corporation.
FAA orders 21 airworthiness directives · newest first
All orders naming the Lockheed 18
By system
Orders by system, as a table
| orders | share | |
|---|---|---|
| Other and general | 7 | 33% |
| Flight controls | 4 | 19% |
| Landing gear | 3 | 14% |
| Heating, ice protection and utility systems | 2 | 10% |
| Fuel system | 2 | 10% |
| Airframe structure | 1 | 5% |
| Rotorcraft systems | 1 | 5% |
| Engine | 1 | 5% |
Failure reports 3 since 2002 · what operators and shops told the FAA
Failure reports by year, as a table
| reports | |
|---|---|
| 02 | 3 |
By system
Failure reports by system, as a table
| reports | share | |
|---|---|---|
| Airframe structure | 3 | 100% |
Parts most often reported as the reports name them
Latest reports
Approved replacement parts 9 parts manufacturer approvals
Parts a company other than the maker may make for this design and sell as FAA-approved. The companies holding the most:
Most often: radome rca (2), underseat scope (1), stabilizer tips (1), radome ant (1), nose cap (1), fuel quantity (1), fuel placard (1), bullet fairing (1).
Approved modifications 156 supplemental type certificates
Changes the FAA has approved for this design, from new avionics and engines to floats and parachutes. The companies holding the most:
Latest
Certificates and bulletins
Sources: the FAA's type certificate data sheets, airworthiness directives, supplemental type certificates, special conditions and special airworthiness information bulletins (Dynamic Regulatory System), and the FAA's service difficulty reports. A failure report is what an operator or repair station chose to file; the counts show reporting as much as reliability, and larger and commercial fleets report more. How the systems are grouped.
Connections how the 18 links to the rest of the register
- Lockheed 197 aircraft on the register
- Lockheed 18-56 10 registered
- Lockheed 18 2 registered
- Lockheed 18-50 1 registered
- Built of aluminium
- Wright C9HD series 6 of these aircraft · 1425 hp
- Wright C9GC&D series 3 of these aircraft · 1200 hp
- Wright 1820F56 2 of these aircraft · 785 hp
- Wright R-1820 series 1 of these aircraft · 1475 hp
- Texas 5 of these aircraft
- California 2 of these aircraft
- Alaska 2 of these aircraft
- Washington 1 of these aircraft
- Virginia 1 of these aircraft
- Tupelo Aeronautics INC 1 of these aircraft
- Snowy LLC 1 of these aircraft
- Rassawek Ventures INC 1 of these aircraft
- Lone Star Flight Museum 1 of these aircraft
- Houston Aeronautical Heritage Society INC 1 of these aircraft
- NTSB accidents and incidents involving the 18 4 cases since 1982 · 2 fatal
- FAA orders naming the 18 21 airworthiness directives
- Failure reports filed on the 18 3 reports since 1995
- Approved modifications for the 18 156 supplemental type certificates
The whole map of how records connect · these connections as data: /graph/model/lockheed/18.json.
Aircraft newest certificates first · 13
| Tail no. | Maker and model | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|
| N96334 | Lockheed 18-56 |
Rassawek Ventures INC Rockville, Virginia |
Standard | 2026-10-26 | ValidFAA registration status code V: Valid registration. All codes |
| N781G | Lockheed 18-56 |
Tupelo Aeronautics INC Tupelo, Mississippi |
Standard | 2026-08-19 | ValidFAA registration status code V: Valid registration. All codes |
| N442D | Lockheed 18 |
Snowy LLC Anchorage, Alaska |
Standard | 2024-06-11 | ValidFAA registration status code V: Valid registration. All codes |
| N90711 | Lockheed 18 |
Individual owner Alaska |
Standard | 2022-03-28 | ValidFAA registration status code V: Valid registration. All codes |
| N177L | Lockheed 18-56 |
Lone Star Flight Museum Houston, Texas |
Standard | 2021-10-27 | ValidFAA registration status code V: Valid registration. All codes |
| N41CW | Lockheed 18-56 |
Co-owned owner California |
Standard | 2020-06-19 | ValidFAA registration status code V: Valid registration. All codes |
| N250TS | Lockheed 18-56 |
Co-owned owner California |
Standard | 2018-11-20 | ValidFAA registration status code V: Valid registration. All codes |
| N21G | Lockheed 18-56 |
Individual owner Washington |
Standard | 2017-05-08 | ValidFAA registration status code V: Valid registration. All codes |
| N631LS | Lockheed 18-56 |
Individual owner Montana |
Standard | 2014-05-09 | ValidFAA registration status code V: Valid registration. All codes |
| N250D | Lockheed 18-56 |
Individual owner Texas |
Standard | 2014-04-29 | ValidFAA registration status code V: Valid registration. All codes |
| N1940S | Lockheed 18-56 |
Individual owner Texas |
Standard | 2011-11-22 | ValidFAA registration status code V: Valid registration. All codes |
| N31G | Lockheed 18-56 |
Houston Aeronautical Heritage Society INC Houston, Texas |
Standard | 2003-02-10 | ValidFAA registration status code V: Valid registration. All codes |
| N60JT | Lockheed 18-50 |
American Airpower Heritage Flying Museum Dallas, Texas |
Standard | 2002-11-22 | ValidFAA registration status code V: Valid registration. All codes |