# N974R: 1957 Lockheed 1649A-98

- Status: Valid registration
- Airframe: [Lockheed 1649A-98](https://openairdocs.org/model/lockheed-1649a-98) (registry code 5262202, 102 seats)
- Engine: [Wright TC18EA series](https://openairdocs.org/engine/wright-tc18ea-series) (registry code 67038)
- Data sheets: [TCDS 4A17](https://openairdocs.org/tcds/4A17) (Lockheed Martin Aeronautics Company) (OpenAirDocs)
- Serial number: 1040
- Year built: 1957
- Type: Fixed wing multi engine
- Engine type: Reciprocating
- Airworthiness: Standard, transport
- Airworthiness date: March 3, 1966
- Certificate issued: July 16, 2012
- Expires: July 31, 2028
- Mode S code: AD93F8
- 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=974R
- Page: https://openairdocs.org/aircraft/N974R

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 TC18EA model are included.

## ADs that may apply (OpenAirDocs): 16 in force

### Matched by airframe (Lockheed 1649A-98)

- [AD 2026-13-02](https://openairdocs.org/ad/2026-13-02): Navigation · Airbus Canada Limited Partnership 18, 49-46, 80-A and 555 more. Effective Jul 1, 2026
- [AD 2023-10-02](https://openairdocs.org/ad/2023-10-02): Indicating/Recording System, Navigation · Boeing 18, 23, 35 and 1,060 more. Effective May 26, 2023
- [AD 93-14-12](https://openairdocs.org/ad/93-14-12): Crewmember Protective Breathing Equipment Units · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 201 more. Effective Sep 2, 1993
- [AD 71-07-02](https://openairdocs.org/ad/71-07-02): Obstacle Clearance Profile · Lockheed 1049-54, 1049B-55 (Navy R7V-1), 1049C-55 and 12 more. Effective Apr 3, 1971
- [AD 64-08-02](https://openairdocs.org/ad/64-08-02): Wing Upper Milled Skin Panel · Lockheed Martin Aeronautics 1649A-98. Effective May 11, 1964
- [AD 64-03-03](https://openairdocs.org/ad/64-03-03): Blades · Boeing DC-6, DC-6A, DC-6B and 26 more. Effective Mar 1, 1964
- [AD 64-02-05](https://openairdocs.org/ad/64-02-05): Openable Window in the Crew Exit · Overhead emergency exit hatch between fuselage station 278.4… (Flying Tiger Line STC SA4-948). Effective Jan 10, 1964
- [AD 62-21-04](https://openairdocs.org/ad/62-21-04): Wing Lower Skin · Lockheed Martin Aeronautics 1649A-98. Effective Nov 2, 1962
- [AD 61-03-04](https://openairdocs.org/ad/61-03-04): Fuel Vent System · Lockheed Martin Aeronautics 1649A-98. Effective Feb 13, 1961
- [AD 60-10-04](https://openairdocs.org/ad/60-10-04): Fuselage Aft Pressure Bulkhead · Lockheed 1049-54, 1049B-55 (Navy R7V-1), 1049C-55 and 12 more
- [AD 60-08-04](https://openairdocs.org/ad/60-08-04): Rudder Torque Tube · Lockheed 1049-54, 1049B-55 (Navy R7V-1), 1049C-55 and 6 more
- [AD 59-20-02](https://openairdocs.org/ad/59-20-02): Fuel Use Placard and Flame Arrestors · Lockheed Martin Aeronautics 1649A-98
- [AD 58-21-01](https://openairdocs.org/ad/58-21-01): Bulkhead Corrosion Inspection · Lockheed 1049-54, 1049C-55, 1049D-55 and 10 more
- [AD 58-13-03](https://openairdocs.org/ad/58-13-03): Aileron Control Valve Modification · Lockheed Martin Aeronautics 1649A-98
- [AD 57-03-03](https://openairdocs.org/ad/57-03-03): Micronic Filter Cover · Boeing DC-7, DC-7B, DC-7C and 16 more
- [AD 57-03-02](https://openairdocs.org/ad/57-03-02): Fuel Strainer Screen · Boeing DC-7, DC-7B, DC-7C and 15 more

### Matched by engine (Wright TC18EA series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N974R.

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Incident 19880919062779I](https://openairdocs.org/incident/19880919062779I), Sep 19, 1988: Lkheed 1649A98 (N974R), Sanford, FL, Minor damage. Engine quit. Landed. Hit taxi light to ramp. Oil and fuel leaking. Pilots not current. Passenger on ferry flight.

## 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.

## STCs that may be installed (OpenAirDocs) (16)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the airframe (Lockheed 1649A-98)

- [STC SA01967WI](https://openairdocs.org/stc/SA01967WI): Use of GAMI G100UL High Octane Unleaded Avgas. General Aviation Modifications Inc
- [STC SA836WE](https://openairdocs.org/stc/SA836WE): Hydro-Aire Mark II anti-skid braking system to reduce required landing field length. Alaska Airlines Inc
- [STC SA1351WE](https://openairdocs.org/stc/SA1351WE): Replace existing fabric on wings, fuselage, empennage, and/or control surfaces, with Ceconite101 material. (262A Series -12). Ceconite Inc
- [STC SA907WE](https://openairdocs.org/stc/SA907WE): ONE ONLY STC, SN 1018: Installation of Cargo/Passenger combination interiors. Alaska Airlines Inc
- [STC SA495WE](https://openairdocs.org/stc/SA495WE): Applicable only to L-1649A/02 aircraft converted to cargo in accordance with STC No SA4-1295 and SA4-1402. Install 3 1800 Gal KC97 fuselage tanks for the carriage of petroleum fuels as cargo. Alaska Airlines Inc
- [STC SA280WE](https://openairdocs.org/stc/SA280WE): Passenger interior installation - 95 or 98 passengers, 106 occupants maximum. World Airways Inc
- [STC SA4-1295](https://openairdocs.org/stc/SA4-1295): Convert aircraft to cargo configuration. Lockheed Aircraft Service Inc
- [STC SA4-1350](https://openairdocs.org/stc/SA4-1350): Cover rudders and trim tabs with Ceconite 101 material. Cooper Engineering Corporation
- [STC SA4-1215](https://openairdocs.org/stc/SA4-1215): Convert to cargo aircraft, including installation of front and rear doors, cargo floors, cargo lining, and miscellaneous items. Lockheed Aircraft Service Co
- [STC SA4-1402](https://openairdocs.org/stc/SA4-1402): Reinforcing structure. Lockheed Aircraft Service Co
- [STC SA258WE](https://openairdocs.org/stc/SA258WE): One Type III emergency exit. Lockheed Aircraft Service Co
- [STC SA259WE](https://openairdocs.org/stc/SA259WE): Interior installation. Lockheed Aircraft Service Co
- [STC SA466CE](https://openairdocs.org/stc/SA466CE): Fairchild A-100 cockpit voice recorder. Trans World Airlines Inc
- [STC SA546WE](https://openairdocs.org/stc/SA546WE): Modification of crew entrance door window mechanism. Gamco Precision
- [STC SA83SO](https://openairdocs.org/stc/SA83SO): Oil separator B-300-1. Air Carrier Eng Service Inc
- [STC SA4-608](https://openairdocs.org/stc/SA4-608): Engine mount core assemblies DE-643-1 on Wright TC18 Series engines. Dow-Elco Inc

## Related

- Other Lockheed 1649A-98 aircraft: https://openairdocs.org/model/lockheed-1649a-98/aircraft.md
- The Wright TC18EA series engine: https://openairdocs.org/engine/wright-tc18ea-series.md

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