ASN Wikibase Occurrence # 366209
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| Date: | Tuesday 11 September 1990 |
| Time: | 10:39 LT |
| Type: |  Hiller OH-23C |
| Owner/operator: | Coastal Aviation |
| Registration: | N96168 |
| MSN: | 55-4129 |
| Total airframe hrs: | 3742 hours |
| Engine model: | FRANKLIN 6V4-335-13 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Fort Pierce, FL -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Training |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE CFI STATED THAT HE WAS TEACHING LOW ROTOR RPM RECOVERY TECHNIQUES DURING CLIMB OUT AFTER TAKEOFF. THE STUDENT WAS TO TAKE THE CONTROLS & RECOVER THE HELICOPTER TO A 4 FT HOVER. AT 30 FT, WITH THE ROTOR RPM AT 2,900, THE STUDENT TOOK CONTROL & OPENED THE THROTTLE BUT PULLED COLLECTIVE. THE ENG RPM DROPPED BELOW 2,500. THE CFI TOOK THE CONTROLS, VERIFIED THAT THE THROTTLE WAS OPENED & LOWERED COLLECTIVE. DURING THE RUN-ON LANDING AFTER TOUCHDOWN, THE MAIN ROTOR BLADES CONTACTED THE TAIL BOOM. EXAM OF THE ENG BY A MECHANIC WITH INSPECTION AUTHORIZATION REVEALED THAT ONE OF THE PACKING SEALS WHICH SEAL THE DISTRIBUTION ZONE PIPE TO THE INLET MANIFOLD, SEPARATED FOR UNDETERMINED REASONS RESULTING IN THE PARTIAL LOSS OF ENG POWER.
Probable Cause: LOSS OF ENGINE POWER DUE TO SEPARATION OF THE PACKING SEAL WHICH SEALS THE DISTRIBUTION ZONE PIPE TO THE INLET MANIFOLD, FOR UNDETERMINED REASONS RESULTING IN A HARD LANDING.
Accident investigation:
 |
|
Sources:
NTSB MIA90LA182
History of this aircraft
Other occurrences involving this aircraft
| 22 August 1984 | N96168 | Heuer, Dan | 0 | Kindred, ND | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 20-Mar-2024 18:33 | ASN Update Bot | Added |
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