ASN Wikibase Occurrence # 31104
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Tuesday 11 March 1997 |
| Time: | 11:00 LT |
| Type: |  Bell UH-1B |
| Owner/operator: | Colony Services, Inc. |
| Registration: | N70696 |
| MSN: | 62-2088 |
| Year of manufacture: | 1962 |
| Total airframe hrs: | 7662 hours |
| Engine model: | Lycoming T53L11D |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | LaBelle, Florida -
 United States of America
|
| Phase: | Unknown |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
A main rotor blade had been changed during troubleshooting of the main rotor system. While in a hover to track and balance the rotor system, the other main rotor blade and grip separated. Examination showed the main rotor blade and grip separated due to fatigue cracking of 40 out of 49 main blade strap laminates. The blade that had been change and did not separate was found to have 26 out of 49 main blade strap laminates separated due to fatigue. The fatigue initiated at the strap pin hole. The main blade straps have a life limit of 1,200 flight hours. Logbook records showed the main blade straps were installed in the rotor hub assembly during overhaul in Singapore, 640.4 flight hours before failure. The main rotor straps were reported to be new when installed.
Probable Cause: Company maintenance personnel's failure to properly evaluate a main rotor system problem resulting in main rotor straps with multiple laminates separated due to fatigue cracking being allowed to continue in service until failure and separation of a main rotor blade.
Accident investigation:
 |
|
Sources:
NTSB MIA97LA099
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 27-Sep-2008 01:00 | ASN archive | Added |
| 31-Oct-2011 10:24 | Dr. John Smith | Updated [Time, Total fatalities, Total occupants, Other fatalities, Location, Country, Phase, Nature, Source, Damage, Narrative] |
| 08-Apr-2024 16:36 | ASN Update Bot | Updated [Time, Cn, Operator, Total occupants, Other fatalities, Phase, Nature, Source, Narrative, Category, Accident report] |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation