ASN Wikibase Occurrence # 829
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| Date: | Tuesday 4 December 2007 |
| Time: | 14:55 LT |
| Type: |  Robinson R22 Beta |
| Owner/operator: | Golden Eagle Enterprises, Inc. |
| Registration: | N805EH |
| MSN: | 1907 |
| Year of manufacture: | 1991 |
| Total airframe hrs: | 13078 hours |
| Engine model: | Lycoming O-320-B2C |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | Fresno Chandler Executive Airport, Fresno, California -
 United States of America
|
| Phase: | |
| Nature: | Training |
| Departure airport: | Fresno Yosemite International Airport, CA (FAT/KFAT) |
| Fresno Yosemite International Airport, CA (FAT/KFAT) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Just as the helicopter touched down while performing a hovering autorotation, the certified flight instructor (CFI) heard a loud 'snap' coming from the right side. The CFI took the controls from the student and attempted to neutralize the anti-torque pedals, but reported that they were stuck in place, with the right pedal in the forward position. He reduced the engine rpm's to 75 percent, and attempted to move the pedals to no avail. At that point, he instructed the student to start the shutdown procedures. Following a normal shutdown, they exited the helicopter, and began to inspect the cause of the stuck anti-torque pedal. Both the CFI and student observed a broken metal structure adjacent to the restraining block that retains the anti-torque pedals. The CFI reported that it appeared to be the actual metal structure that the entire pedal assembly bolts to. The helicopter inspection revealed that the right-hand support bracket (part number A359-2) of the tail rotor control system had failed. The operator reported that the airframe had a total time of 13,000 hours. The helicopter manufacturer reported that they had been aware of other failed support brackets on helicopters with over 7,500 hours in service. As a result, the manufacturer increased the thickness of the support bracket material, and changed their overhaul procedures requiring replacement of the A359-1 and -2 support brackets at overhaul for all R22 and R44 models. The manufacturer also issued service bulletin (SB) SB-97 for the R22 and SB-63 for the R44, which require the addition of a safety tab on the older thinner support brackets.
Probable Cause: Failure of the tail rotor system support bracket during landing.
Accident investigation:
 |
|
Sources:
NTSB LAX08IA032
FAA register: NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20071211X01927&key=1
FAA register: 2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=805EH
History of this aircraft
Other occurrences involving this aircraft
| 27 April 1998 | N805EH | Sacramento Executive Helicopte | 0 | Sacramento, CA | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 23-Jan-2008 04:22 | JINX | Added |
| 29-Sep-2016 21:54 | Dr.John Smith | Updated [Time, Location, Departure airport, Destination airport, Source, Narrative] |
| 21-Dec-2016 19:13 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 21-Dec-2016 19:14 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 21-Dec-2016 19:16 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 21-Dec-2016 19:20 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 05-Dec-2017 09:45 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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