# N353HH: 1998 Heldeberg Designs BLUE HERRON MARATHON

- Status: Valid registration
- Airframe: [Heldeberg Designs BLUE HERRON MARATHON](https://openairdocs.org/model/heldeberg-designs-blue-herron-marathon) (registry code 05627ER, 2 seats)
- Engine: [Rotax 582SER](https://openairdocs.org/engine/rotax-582ser) (registry code 55556)
- Serial number: HD980034SS
- Year built: 1998
- Type: Powered parachute
- Engine type: 2 cycle
- Airworthiness: Experimental, exhibition
- Airworthiness date: September 16, 2009
- Certificate issued: October 2, 2008
- Expires: August 31, 2028
- Mode S code: A3F0A9
- Registered owner: [Loeffelholz John R](https://openairdocs.org/faa-owner/LOEFFELHOLZ%20JOHN%20R)
- Location: [Yukon, OK](https://openairdocs.org/faa-place/OK/Yukon)
- Owner type: Individual
- Owner's area on the map: 35.5184° N, 97.7662° W: Placed by OpenAirDocs at the center of ZIP code 73099, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=353HH
- Page: https://openairdocs.org/aircraft/N353HH

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): 0 in force

### Matched by airframe (Heldeberg Designs BLUE HERRON MARATHON)

None in force.

### Matched by engine (Rotax 582SER)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N353HH.

## FAA accident and incident reports

None matched to N353HH.

## 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.

## Service difficulty reports on N353HH not matched to an aircraft (1)

They name N353HH, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [SDR 96ZZZX1388](https://openairdocs.org/sdr/96ZZZX1388), Feb 26, 1996: SHAFT. WORN. HYDRAULIC FAILURE DUE TO WEAR OF HYDRAULIC PUMP AND SHAFT SPLINES AND SHAFT COUPLING SPLINES. HYDRAULIC PUMP HARD TO ROTATE AFTER REMOVAL. REPLACED PUMP, COUPLI

## STCs that may be installed (OpenAirDocs)

None matched to this aircraft's models.

## Related

- Other Heldeberg Designs BLUE HERRON MARATHON aircraft: https://openairdocs.org/model/heldeberg-designs-blue-herron-marathon/aircraft.md
- The Rotax 582SER engine: https://openairdocs.org/engine/rotax-582ser.md

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