mj(at)yakuk.com
Guest
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 Posted: Mon May 22, 2006 11:34 pm Post subject: shock rules |
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Richard and I with some 500 a/c supplied between us agree a strip inspection
is the correct procedure. We find approx 1 in 5 engines have a cracked part.
This is what veronish said in 2002.
++++++++++++++++++++++++++
On the possibility of operation of M-14P engines after they had propeller
impact against ground or other obstacles
At aircraft propeller impact against ground or other obstacles parts of gear
box (propeller shaft, satellites, gears, propeller shaft bearing),
crankshaft, gas distribution mechanism and supercharger drives receive
sufficient non-evaluated shock loads. This makes impossible to evaluate
their influence on engine workability in further operation without
inspection.
Parts and units been overloaded (supercharger casing and parts, unit drives,
gas distributor parts, connecting rods, parts of cylinder group) may be
further used on condition that special inspection is carried out, which
guarantees revealing the hidden defects, caused by overloading.
Engine cylinders, gearbox casing, rear cover, accessories, etc. may be used
without special inspection, just according to conventional inspection
procedure during overhaul.
According to the above stated, we consider that engine operation after
propeller impact against ground or other obstacles is impermissible, as it
may impinge flight security.
Such engines should be directed to OJSC OKB Motorostroyeniya or certified
overhaul organizations to evaluate their technical condition and make
decision on overhaul possibility and acceptance for further operation.
Vice-designer general [signature] V.D.Sherstiukov
+++++++++++++++++
So if you have a ground strike don't mess about saying cents, this is why
you pay for insurance. Rest assured we experience pressure from insurance
assessors to do the cheapest job possible. They are not responsible for
continued airworthiness, its the guy with the pen!! Insurance co wants
"cheap as possible" Owner wants "as quick as possible" Maintenance co/
licensed guy wants "his ass covered"
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