# N4HT: 1978 Eiriavion PIK 20D

- Status: Valid registration
- Airframe: [Eiriavion PIK 20D](https://openairdocs.org/model/eiriavion-pik-20d) (registry code 5760206, 1 seats)
- Engine: [NONE](https://openairdocs.org/engine/none) (registry code 00000)
- Data sheets: [TCDS G31EU](https://openairdocs.org/tcds/G31EU) (Eiriavion Oy) (OpenAirDocs)
- Serial number: 20637
- Year built: 1978
- Type: Glider
- Engine type: None
- Airworthiness: Standard, glider
- Airworthiness date: September 26, 1978
- Certificate issued: July 12, 2021
- Expires: July 31, 2028
- Mode S code: A4A8B0
- Registered owner: [Mitchell Lawrence W S](https://openairdocs.org/faa-owner/MITCHELL%20LAWRENCE%20W%20S)
- Location: [San Antonio, TX](https://openairdocs.org/faa-place/TX/San%20Antonio)
- Owner type: Individual
- Owner's area on the map: 29.6252° N, 98.4219° W: Placed by OpenAirDocs at the center of ZIP code 78259, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4HT
- Page: https://openairdocs.org/aircraft/N4HT

From the FAA registry file of October 22, 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): 3 in force

### Matched by airframe (Eiriavion PIK 20D)

- [AD 97-08-06 R1](https://openairdocs.org/ad/97-08-06-R1): Quick Connectors · Alexander Schleicher AS-K 13, AS 12, ASK 21 and 39 more. Effective Aug 1, 1997
- [AD 84-15-07](https://openairdocs.org/ad/84-15-07): Rudder Bottom Hinge Bracket · Eiriavion PIK-20, PIK-20B and PIK-20D. Effective Nov 23, 1984
- [AD 77-16-08](https://openairdocs.org/ad/77-16-08): Wing Panels · Eiriavion PIK-20D. Effective Aug 8, 1977

### Matched by engine (NONE)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations (1)

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 LAX96LA144](https://openairdocs.org/ntsb/LAX96LA144), Mar 23, 1996: Eiriavion PIK 20D (N4HT), Hollister, CA, substantial damage. Probable cause: the pilot's improper in-flight decision to take a longer than necessary route back to the airport during a period of marginal lift.

## 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.

- [Accident 19960323005009A](https://openairdocs.org/incident/19960323005009A), Mar 23, 1996: Eirvon PIK20D (N4HT), Hollister, CA, Substantial damage. Pilot was landing in grassy field, on roll out wing dipped and struck the ground. Ground looped, damaged tail boom. (.4)according to the pilot, after an aerial…

## 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)

None matched to this aircraft's models.

## Related

- Other Eiriavion PIK 20D aircraft: https://openairdocs.org/model/eiriavion-pik-20d/aircraft.md
- The NONE engine: https://openairdocs.org/engine/none.md

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