# Accident 19980815020969A: Amtr MINIIMPRC2, Sonoma, CA, August 15, 1998

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: August 15, 1998, 12:35 local time
- Place: Sonoma, CA
- Airport: Sonoma Sky Park Airport
- Damage: Substantial damage
- Phase of flight: Forced/Precautionary Landing
- Operating rules: General operating rules (Part 91)
- Location: 38.2394° N, 122.4596° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=38.2394&lon=-122.4596&mi=10
- Aircraft: N55961, a cancelled registration (https://openairdocs.org/deregistered/N55961-2013-06-07) (OpenAirDocs)
- Registry model: Voegele Raymond C MINI IMP RC-2 (registry code 0565423, https://openairdocs.org/model/voegele-raymond-c-mini-imp-rc-2) (OpenAirDocs)
- Registry engine: Revmaster 2100 (registry code 52550, https://openairdocs.org/engine/revmaster-2100) (OpenAirDocs)
- Reported make and model: AMTR MINIIMPRC2
- People aboard: 1
- Fatal injuries: 0
- Pilot flight hours: 1,922 total, 3 in this make and model, 5 in the last 90 days
- NTSB investigation: [NTSB LAX98LA265](https://openairdocs.org/ntsb/LAX98LA265) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19980815020969A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

ACFT REPORTEDLY LOST POWER, CRASHED ON THE ROOF AND WENT INTO AN ATTIC OF AN UNOCCUPIED HOME, NO INJURIES WERE REPORTED. (.4) AFTER TAKEOFF, THE PILOT NOTED A PARTIAL LOSS OF ENGINE POWER AND ATTEMPTED TO LAND IN AN OPEN FIELD; HOWEVER, THE AIRPLANE'S LANDING GEAR STRUCK TREES AND IT COLLIDED WITH THE ROOF OF AN OCCUPIED HOUSE. THE PILOT STATED THAT THE ENGINE DID NOT SPUTTER, SURGE, OR BACKFIRE, AND THE ENGINE WAS JUST NOT PRODUCING FULL POWER.  EXAMINATION OF THE AIRPLANE DISCLOSED THAT THERE WAS A LOOSE MAGNETO CAP WITH ONE SCREW MISSING, AND THE OTHER TWO WERE ONLY ENGAGED BY THREE THREADS.  INTERFERENCE WAS ALSO FOUND AT THE MIDPOINT OF THE THROTTLE CONTROL SYSTEM AS A RESULT OF THE IMPROPER ROUTING OF THAT SYSTEM IN THE AIRFRAME, AND A MISRIGGED CARBURETOR HEAT BOX, WHICH RESULTED IN AN INABILITY TO ACHIEVE FULL THROTTLE MOVEMENT AT THE CARBURETOR.                                 (-23) THE AIRCRAFT HAD ERRATIC POWER IMMEDIATELY AFTER TAKEOFF FROM SONOMA SKYPARK AIRPORT. STORAGE SITE INVESTIGATION WAS NON-CONCLUSIVE BUT EVIDENCE INDICATED A LOOSE MAGNETO CAP WITH ONE SCREW MISSING AND TWO SCREWS ONLY ENGAGED BY THREE OR FOUR THREADS, MAY HAVE CONTRIBUTED TO ENGINE RPM CHANGE. ALSO MODERATED INTERFERENCE OF THE THROTTLE CONTROL SYSTEM FROM IMPROPER INSTALLATION AND CARBURETOR HEAT-BOX MISADJUSTMENT WERE LIKELY CONTRIBUTING FACTORS. 44709 RIDE WILL BE SOUGHT.

## The NTSB's investigation of this event (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 LAX98LA265](https://openairdocs.org/ntsb/LAX98LA265), Aug 15, 1998: Raymond C. Voegele Mini IMP RC-2 (N55961), Sonoma, CA, substantial damage. Probable cause: A loss of power due to a loose magneto cap and a binding throttle control cable. The deficiencies were the result of the owner/pilot's improper installation and/or adjustments.

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. For accidents, the NTSB's own investigation is the fuller record.

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