Theories welcome..... How can you (apparently) not damage the fuselage and end up with the UH-1H balanced on its rotorhead with the skids ripped off? - Occurred this morning, 28th June
A Bosnian army helicopter landed upside down when it crashed near the capital Sarajevo during a training flight on Thursday, injuring its three crew members, the defence ministry said.
“There were three crew members and they were all hospitalised in Sarajevo,” the ministry said in a statement.
The UH-1H helicopter went down near a highway in the region of Ilijas, some 20 kilometres (12 miles) northeast of Sarajevo. The cause of the crash was not immediately known.
An AFP photographer said the wreckage of the helicopter was lying upside down in a field, with its main rotor blades broken and the tail damaged.
I was an IP Flying with student at qualification trg Task - simulated engine failure at altitude After initial, not ideal-student overrides me, I stopped that, nose turns right 20-30 deg then abnormaly continues turn Hanged with left skid lower At 110 deg i put collective down thought tail rotor had failed Contacted ground with left skid inertially moving backward Rolled on the left side Blade hit the ground and broke
We all make mistakes-nothing to say against that....but read it again:
Quote:
I was an IP
Flying with student at qualification trg
Task - simulated engine failure at altitude
After initial, not ideal-student overrides me, I stopped that, nose turns right 20-30 deg then abnormaly continues turn
Hanged with left skid lower
At 110 deg i put collective down thought tail rotor had failed
Contacted ground with left skid inertially moving backward
Rolled on the left side
Blade hit the ground and broke
May i ask:
1. What are the qualifications of the IP? 2. What is the flying experience of the student?
I can't answer your questions I'm afraid, I don't know. I am presuming that the qualifications of the instructor and the experience of the student were properly matched for that training flight.
I also believe there may be something lost in his translation, it sounds to me as though they were practicing hover engine off landings as there does not seem to be an autorotation phase. It doesn't really matter, as he was yawing through 110 deg, close to the ground, he assessed that the tail rotor had failed and did what he thought was the correct thing to do. Unfortunately the skid caught something and the rest is academic.
I am sure there will have been an enquiry, and I'm sure all possible lessons will be dragged out of it. For as long as humans train other humans to operate complex machinery, we will have training accidents. Luckily, this accident was low cost.
Please read first ATM task simulated engine at altitude huey hcr then try to help me if you can.Is it possible to loose tail rotor effectiveness at initial or to have overtorque and brake the xmsn or anything else but please someone who experienced anything similar
I have been a military flight instructor on the Huey for many years.
By what you are describing there, it sounds to me like a student who increased power/throttle to quick, without reacting on the pedals.
LTR is very, very unlikely during autorotation (although not impossible).... If the throttle is opened too quickly, it could shear off the tail rotor driveshaft..
If you ask me he was having a go at cutting the grass! If you look closely its all nice and short close to the helo and much taller in the distance....
What he didn't have though was a rigid rotor and an inverted fuel/oil system for sustained negative G.
