ASN Wikibase Occurrence # 292827
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| Date: | Friday 18 November 2005 |
| Time: | 15:30 LT |
| Type: |  Schweizer 269C |
| Owner/operator: | Topeka City Police |
| Registration: | N400PD |
| MSN: | S1833 |
| Year of manufacture: | 2002 |
| Total airframe hrs: | 2253 hours |
| Engine model: | Lycoming HIO-360-D1A |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Manhattan, KS -
 United States of America
|
| Phase: | Unknown |
| Nature: | Unknown |
| Departure airport: | Topeka-Philip Billard Airport, KS (TOP/KTOP) |
| Emporia Airport, KS (EMP/KEMP) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During a public use solo instructional flight the helicopter sustained substantial damage when it nosed over in a rocky, uneven field during a precautionary landing following an observed split in rotor/engine tachometer readings and an audible low rotor rpm alarm in cruise flight. The pilot perceived a mechanical emergency and performed a precautionary landing. The control box, tachometer cable, and tachometer were examined. The control box warning circuitry was not operational when first checked and operated after repair of an open circuit found on the circuit board. No anomalies were detected with the tachometer. Visual examination of the cable revealed indications of excessive wear and possible binding with windup of the outer strands. Binding of the cable is consistent with a bouncing tachometer needle.
Probable Cause: The binding of the main rotor blade's tachometer cable during cruise flight resulting in an observed split tachometer indication/aural alarm and perceived mechanical emergency and the unsuitable terrain the pilot encountered during the emergency landing. A factor was the rocky terrain.
Accident investigation:
 |
|
Sources:
NTSB CHI06TA033
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 09-Oct-2022 09:35 | ASN Update Bot | Added |
| 31-May-2023 04:06 | Ron Averes | Updated |
Corrections or additions? ... Edit this accident description
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