ASN Wikibase Occurrence # 385318
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| Date: | Saturday 21 October 2000 |
| Time: | 09:05 LT |
| Type: |  Zenair CH 2000 |
| Owner/operator: | Private |
| Registration: | N420ZA |
| MSN: | 200042 |
| Total airframe hrs: | 342 hours |
| Engine model: | Lycoming O-235-N2C |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Springfield, IL -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Private |
| Departure airport: | (KSPI) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The airplane was substantially damaged when it struck a gate and a fence during a forced landing after takeoff. The pilot said that at about 450 feet agl, "...the engine started to run very erratic with an appreciable loss of thrust...." He said that the engine was not producing enough thrust to maintain level flight. A forced landing was attempted on an airport road. No mechanical malfunction was listed in the pilot's written report. The aircraft engine was examined and the nut that secures the carburetor heat control cable housing was found loose. According to the inspectors report, "... full travel of the carburetor heat valve could not be achieved." A postaccident engine run was conducted and the engine ran at idle power with "slight roughness". Engine speed was increased to 1700 rpm and a magneto check performed with the right magneto showing about a 150-rpm drop, and the left showing about a 125-rpm drop. The engine produced 2400 static rpm at full throttle. The weather report listed the temperature and dew point as 13 degrees Celsius and 11 degrees Celsius respectively. According to the Carburetor Icing chart from Transport Canada, this temperature and dew point are in the range for serious icing potential at all power settings.
Probable Cause: the loose carburetor heat control clamp bolt and carburetor heat not available to the pilot. Factors were the low altitude, the carburetor icing conditions, the fence and the security gate.
Accident investigation:
 |
|
Sources:
NTSB CHI01LA019
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Apr-2024 17:20 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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