ASN Wikibase Occurrence # 387270
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| Date: | Saturday 16 September 2000 |
| Time: | 10:00 LT |
| Type: |  Grumman AA-5 |
| Owner/operator: | Private |
| Registration: | N7196L |
| MSN: | AA5-0496 |
| Year of manufacture: | 1973 |
| Total airframe hrs: | 2246 hours |
| Engine model: | Lycoming O-320-E2G |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Zephyrhills, FL -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Private |
| Departure airport: | (KZPH) |
| Leesburg, FL (KLEE) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot noted the airplane was not climbing as expected and a decreased engine rpm. He checked the throttle and mixture controls then with obstructions ahead, intentionally stalled the airplane; a hard landing resulted. The mixture control arm was in the idle cutoff position and the mixture control cable was fractured aft of the mixture control arm. A bracket near the carburetor securing the mixture cable was displaced to the left 1.5 inches. The swivel assembly in the mixture control arm was installed upside down. Post accident, the engine was operated to 2,300 rpm. Both ends of the flame tube of the muffler were found separated following the engine run. One of the flame tube ends was impact damaged; portions of the fracture surfaces on both flame tube ends had a relatively shiny appearance. Wear and fatigue noted on the mixture control cable adjacent to the fracture area; bending overstress to the right on the remaining fracture surface. The mixture control cable had not been replaced since airplane manufacture in 1974. The airplane had accumulated 2,246 hours since then, 44 hours since the last annual inspection 11 months earlier, and 408 hours since an overhauled muffler was installed.
Probable Cause: the intentional stall/mush by the pilot-in-command due to obstructions ahead resulting in a hard landing. Contributing to the accident was the partial loss of engine power due to fuel starvation caused by wear, fatigue, then overstress separation of the mixture control cable resulting in the mixture control arm moving to the idle cutoff position.
Accident investigation:
 |
|
Sources:
NTSB MIA00LA263
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 03-May-2024 07:18 | ASN Update Bot | Added |
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