ASN Wikibase Occurrence # 385266
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 12 December 2000 |
| Time: | 15:00 LT |
| Type: |  Cessna 172S |
| Owner/operator: | Modern Aero |
| Registration: | N582SP |
| MSN: | 172S8509 |
| Year of manufacture: | 2000 |
| Engine model: | Lycoming IO-360 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | ST. CLOUD, MN -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Training |
| Departure airport: | (KSTC) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The outer 14 inches of one of the propeller blades separated during takeoff at an altitude of 400 to 500 feet above the runway. The certified flight instructor was able to land the airplane on a parallel taxiway without incident. The propeller had 236 hours total time at the time of the incident. Metallurgical examination revealed that about 60 percent of the fracture surface contained features typical of fatigue cracking which emanated from the flat face of the blade arm, near the trailing edge. The examination also revealed the microstructure was normal with the exception that the grain flow pattern followed the surface of the scallop region and not the surface of the blade. Chromium present in the scalloped region of the fracture and not on the fatigued surface indicated that the chromic anodized solution penetrated the indication during the anodizing process prior to the blade being painted.
Probable Cause: the fatigue failure of the propeller blade during the initial takeoff climb. The failure was a result of a material defect, which occurred during the manufacturing process and the manufacturers failure to detect the defect.
Accident investigation:
 |
|
Sources:
NTSB CHI01IA047
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Apr-2024 16:43 | ASN Update Bot | Added |
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