# Thunder Balloons AX7-77

- Type: Aircraft model (FAA registry)
- Registry code: 8970107
- Manufacturer (registry): THUNDER BALLOONS LIMITED
- Model: AX7-77
- Aircraft type: Balloon
- Category: Balloon
- Engines: None
- Seats: 4
- Weight class: Up to 12,499 lb
- Cruise speed: 22 mph
- Certification: Type certificated
- Registered aircraft: 4
- Page: https://openairdocs.org/model/thunder-balloons-ax7-77

Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker.

## ADs that may apply (OpenAirDocs)

Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

- [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

## Information bulletins (advisory) (1)

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

## Registered aircraft (4)

- [N273PQ](https://openairdocs.org/aircraft/N273PQ): [Balloon Quest Inc](https://openairdocs.org/faa-owner/BALLOON%20QUEST%20INC), [Fenton, MI](https://openairdocs.org/faa-place/MI/Fenton), built 1987, S/N 1010
- [N421MT](https://openairdocs.org/aircraft/N421MT): [Wind Surfer Ballooning LLC](https://openairdocs.org/faa-owner/WIND%20SURFER%20BALLOONING%20LLC), [Carlisle, IA](https://openairdocs.org/faa-place/IA/Carlisle), built 1979, S/N 180
- [N619TB](https://openairdocs.org/aircraft/N619TB): [Titov Iulian](https://openairdocs.org/faa-owner/TITOV%20IULIAN), [Temecula, CA](https://openairdocs.org/faa-place/CA/Temecula), built 1985, S/N 619
- [N8530P](https://openairdocs.org/aircraft/N8530P): [Broemmer Olivia L](https://openairdocs.org/faa-owner/BROEMMER%20OLIVIA%20L), [Albuquerque, NM](https://openairdocs.org/faa-place/NM/Albuquerque), S/N 260

## NTSB investigations (3)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB FTW95LA267](https://openairdocs.org/ntsb/FTW95LA267), Jul 4, 1995: Thunder and Colt AX7-77 (N5402V), Santa Fe, NM, no damage. Probable cause: THE PILOT'S IMPROPER PLANNING FOR THE HIGH WIND LANDING. FACTORS WERE THE UNFAVORABLE WINDS AND THE TREE STUMP.
- [NTSB LAX93LA022](https://openairdocs.org/ntsb/LAX93LA022), Oct 31, 1992: Thunder and Colt AX7-77 (N666TE), Sierra Vista, AZ, destroyed. Probable cause: THE FLIGHT'S ENCOUNTER WITH UNFORECAST UNFAVORABLE WINDS.
- [NTSB MKC78DA040](https://openairdocs.org/ntsb/MKC78DA040), May 20, 1978: Thunder AX7-77 (N48189), Lindsborg, KS, substantial damage

## FAA accident and incident reports (6)

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.

- [Accident 19950704040379A](https://openairdocs.org/incident/19950704040379A), Jul 4, 1995: Thundr AX777 (N5402V), Sante Fe, NM. High wind landing. Basket hit tree stump. Tipped over ejecting pilot. Balloon rose hit house. Pass told vent bag.
- [Incident 19930131006149I](https://openairdocs.org/incident/19930131006149I), Jan 31, 1993: Thundr AX777 (N992TC), Plantation, FL, Minor damage. Pilot collided with wire on a balloon descent to an open area. Pilot stated sun in eyes.
- [Accident 19921031047049A](https://openairdocs.org/incident/19921031047049A), Oct 31, 1992: Thundr AX777 (N666TE), Sierra Vista, AZ, Destroyed. Reported wind increased after takeoff. On third landing attempt was dragged into wires and pole. Wind misjudged.
- [Incident 19880821049369I](https://openairdocs.org/incident/19880821049369I), Aug 21, 1988: Thundr AX777 (N562LE), Georgetown, TX. During balloon landing student pilots foot got caught between fuel tank and basket injuring his ankle.
- [Incident 19870816067549I](https://openairdocs.org/incident/19870816067549I), Aug 16, 1987: Thundr AX777 (N875EF), Miramar, FL, Minor damage. The hot air balloon descended into a house trailer during landing.
- [Accident 19780520015169A](https://openairdocs.org/incident/19780520015169A), May 20, 1978: Thundr AX656A (N48189), Lindsborg, KS, Substantial damage. Plt unable to deflate after ldg due to adjustment of ripline fast. Wnd gusting 28K.

## The same model under other registry codes

Amateur-built copies and renamed makers get their own codes.

- [Head Balloons AX7-77](https://openairdocs.org/model/head-balloons-ax7-77): 35 registered aircraft, registry code 4280100
- [Thunder & Colt THUNDER AX7-77](https://openairdocs.org/model/thunder-colt-thunder-ax7-77): 3 registered aircraft, registry code 8970121
- [Thunder & Colt Airborne Amer AX7-77 S1](https://openairdocs.org/model/thunder-colt-airborne-amer-ax7-77-s1): 2 registered aircraft, registry code 2301211
- [Thunder & Colt THUNDER AX7-77 S1](https://openairdocs.org/model/thunder-colt-thunder-ax7-77-s1): 0 registered aircraft, registry code 8970123

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