Thunder Balloons Limited AX7-77
N421MT is a Thunder Balloons Limited AX7-77, a balloon with no engine, built in 1979. It has 4 seats. It is registered to Wind Surfer Ballooning LLC, an LLC in Carlisle, Iowa. The registration is valid: it was issued on March 24, 2020 and expires on March 31, 2030. It holds a standard airworthiness certificate for balloon, dated April 18, 1979.
Aircraft
- Maker
- Thunder Balloons Limited
- Model
- AX7-77 · all AX7-77s and related versions
- Serial number
- 180
- Type
- Balloon
- Power
- None · None NONE
- Seats
- 4
- Year built
- 1979
- Cruising speed
- 22 mph
- Transponder code
- A5007B (octal 51200173)
Registration
- Status
- Valid registration
- Certificate issued
- March 24, 2020
- Expires
- March 31, 2030
- Last FAA action
- October 13, 2023
- Airworthiness
- Standard · Balloon · April 18, 1979
- FAA region
- Central
- FAA record id
- 00021694
Owner as the FAA publishes it
- Name
- Wind Surfer Ballooning LLC
- Type
- LLC
- Address
- 3002 183Rd Ave
Carlisle, IA 50047-5456
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.
Records check free · 0 to understand · 5 clear
The public federal record on N421MT, 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 Wind Surfer Ballooning LLC, an LLC, certificate issued March 24, 2020, expires March 31, 2030. No fractional interest recorded. [1]
Standard certificate for balloon, dated April 18, 1979, consistent with the 1979 manufacture year. [1]
No earlier tail number is recorded against serial 180 for this model in the deregistered file. [2]
No other airframe has carried N421MT 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 N421MT. 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 October 2, 2026. registry.faa.gov/
- FAA deregistered aircraft file (part of the same download), file of October 2, 2026. registry.faa.gov/
- FAA document index: registry documents received in recent weeks, file of October 2, 2026. registry.faa.gov/
- NTSB aviation accident database (CAROL), records through August 27, 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, October 2, 2026. See this record on the FAA site · This record as data