ASN Wikibase Occurrence # 294734
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Date: | Wednesday 28 July 2004 |
Time: | 16:10 LT |
Type: | Robinson R 22 Mariner |
Owner/operator: | Palm Beach Helicopters |
Registration: | N516PB |
MSN: | 2315M |
Year of manufacture: | 1993 |
Total airframe hrs: | 2382 hours |
Engine model: | Lycoming O-320-B2C |
Fatalities: | Fatalities: 0 / Occupants: 2 |
Aircraft damage: | Substantial |
Category: | Accident |
Location: | Lantana, Florida -
United States of America
|
Phase: | Unknown |
Nature: | Training |
Departure airport: | Palm Beach-Palm Beach County Airport, FL (LNA/KLNA) |
Destination airport: | Palm Beach-Palm Beach County Airport, FL (LNA/KLNA) |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:The helicopter landed hard and rolled over after the certified flight instructor (CFI) attempted to recover from a simulated autorotative descent. According to the CFI, as he attempted to level off at 75 to 100 feet above the ground, the helicopter yawed sharply to the left along with a loss of main rotor rpm, and despite his efforts to recover, the helicopter touched down left skid low. The engine was later placed in a test cell and when started operated to approximately 2,550 rpm instead of 2,700 rpm. The No. 3 cylinder was noted to only have 5 psi during the differential compression test. Further examination of the No. 3 cylinder by the cylinder manufacturer revealed discolorations which are typical of high temperature operations; wear on the exhaust valve seating face and exhaust valve guide was noted.
Probable Cause: The failure of the pilot-in-command to maintain recommended main rotor RPM following a reported total loss of engine power due to undetermined reasons, during a practice autorotation resulting in a hard landing and subsequent roll over.
Accident investigation:
|
| |
Investigating agency: | NTSB |
Report number: | MIA04LA113 |
Status: | Investigation completed |
Duration: | 10 months |
Download report: | Final report |
|
Sources:
NTSB MIA04LA113
Revision history:
Date/time | Contributor | Updates |
12-Oct-2022 08:30 |
ASN Update Bot |
Added |
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