cstolaircraft wrote:
As for the in flight break ups. It was found usually that pilot error was a factor. (flying to fast)
Not necessarily true. Corrosion has been a factor also. There have been some accidents due to the following.
Applies to all models H-250, H-295, HT-295, H-391, H-391B, H-395 and H-395A airplanes certificated in any category.
On all models H-250, H-295 (except S/N 1436, 1443 thru 1479), H-391, H-391B, H-395, and H-395A airplanes that have the 391-030-401 wing spar carry-thru assembly, and not modified in accordance with STC SA1590CE within the next 10 hours' time in service, on all land planes with 3000 or more hours' time in service, or upon accumulation of 3000 hours' time in service; and on all seaplanes with 1500 or more hours' time in service, or on airplanes operated in both landplane and seaplane configurations with 3000 or more equivalent landplane hours' time in service or upon accumulation of 3000 equivalent landplane hours' time in service,* and thereafter, at intervals not to exceed 100 hours time-in-service, gamma ray inspect both the lower left and right, main spar, steel carry-thru fitting, P/N 391-030-4072, for cracks or corrosion in accordance with Helio Aircraft Company Service Bulletin No. 36.