# N993TC: 1989 Thunder Balloons AX9-140 SII

- Status: Valid registration
- Airframe: [Thunder Balloons AX9-140 SII](https://openairdocs.org/model/thunder-balloons-ax9-140-sii) (registry code 8970116, 8 seats)
- Engine: [NONE](https://openairdocs.org/engine/none) (registry code 00000)
- Data sheets: [TCDS B2EU](https://openairdocs.org/tcds/B2EU) (Cameron Balloons Ltd.) (OpenAirDocs)
- Serial number: 1601US
- Year built: 1989
- Type: Balloon
- Engine type: None
- Airworthiness: Standard, balloon
- Airworthiness date: December 4, 1989
- Certificate issued: May 6, 2025
- Expires: May 31, 2032
- Mode S code: ADDF74
- Registered owner: [Williams David M](https://openairdocs.org/faa-owner/WILLIAMS%20DAVID%20M)
- Location: [Westtown, NY](https://openairdocs.org/faa-place/NY/Westtown)
- Owner type: Individual
- Owner's area on the map: 41.3241° N, 74.5412° W: Placed by OpenAirDocs at the center of ZIP code 10998, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=993TC
- Page: https://openairdocs.org/aircraft/N993TC

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.

## ADs that may apply (OpenAirDocs): 2 in force

### Matched by airframe (Thunder Balloons AX9-140 SII)

- [AD 2013-03-10](https://openairdocs.org/ad/2013-03-10): Hardware · Aeronaut Instruction Research Skysailor 105, Skysailor 90, 110C and 439 more. Effective Mar 19, 2013
- [AD 2008-04-15](https://openairdocs.org/ad/2008-04-15): Self seal valves · Cameron Balloons AX10-160 (S.1), AX10-160(S.2), AX10-180 (S.1) and 24 more. Effective Mar 25, 2008

### Matched by engine (NONE)

None in force.

## Information bulletins (advisory) (1 in force)

- [SAIB CE-11-44](https://openairdocs.org/saib/CE-11-44): Fuel: Cylinder Strap Installation. Issued Jul 13, 2011

## NTSB investigations

None matched to N993TC.

## FAA accident and incident reports

None matched to N993TC.

## 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) (7)

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 (Thunder Balloons AX9-140 SII)

- [STC SB09657RC](https://openairdocs.org/stc/SB09657RC): Installation of Aircraft Position Lights. Albuquerque Balloon Center, Inc
- [STC SB04407AT](https://openairdocs.org/stc/SB04407AT): Installation of the DBI-III Omega. Balloonacy, Ltd. LLC
- [STC SB1010NE](https://openairdocs.org/stc/SB1010NE): Installation of Aerostat Envelopes Model W-175-5 replacement envelope. Ronald T. DiGiovanni
- [STC SB1020NE](https://openairdocs.org/stc/SB1020NE): Installation of Aerostat Envelopes Model W-210-5 replacement envelope. Ronald T. DiGiovanni
- [STC SB01109CH](https://openairdocs.org/stc/SB01109CH): Replace the Cameron Balloons Ltd. (Thunder) Basket/Burner and fuel tanks with the Cameron Balloons US Basket P/N CBUS301-5/Standard Double Burner P/N CB392 and Cameron Balloons US fuel tanks P/N CB250. Cameron Balloons US
- [STC SB01020CH](https://openairdocs.org/stc/SB01020CH): Replace existing Thunder and Colt envelope fabric with the corresponding Cameron Balloons US envelope fabric as listed. Cameron Balloons US
- [STC SB09348SC](https://openairdocs.org/stc/SB09348SC): Installation of S.S. fuel tanks manufactured by Protank with serial numbers V30US-002 through V30US-015. Balloon Repairs of East Texas

## Related

- Other Thunder Balloons AX9-140 SII aircraft: https://openairdocs.org/model/thunder-balloons-ax9-140-sii/aircraft.md
- The NONE engine: https://openairdocs.org/engine/none.md

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