16
ICAO Circular 18-AN/15
Conclusions
The immediate cause of the accident would appear t o be t h a t the l e f t wing
t i p of the a i r c r a f t came i n t o contact with the water following which the a i r c r a f t crashed and p a r t i a l l y submerged.
The major contributing f a c t o r e would appear t o be:
1 ) poor judgment on the p a r t of the p i l o t i n attempting a turn a t
approximately 1 5 f e e t above the water; and
2) poor technique on the p a r t of the p i l o t i n permitting the a i r craft to stallo
ICAO REF: w 1 2 2
Norseman Aircraft CP-OBH. crashed near Timanami,
pntario. on 30 A w s t 1950
C ircumstance s
The a i r c r a f t took off from Trout Lake, (North Bay), with p i l o t , engineer,
four passengers, and roughly 1,200 pounds of equipment f o r Timagemi, Ontario.
A fisherman on I n g a l l Lake s t a t e d t h a t he saw an a i r c r a f t f l y over a t roughly
1,200 f e e t and heard the engine cut out f o r a period of approximately ten
seconds then pick up againo It was t h i s man's opinion t h a t , although the engine
caught again, i t did not appear t o have the same power and sounded a s though
it was missing, B short time l a t e r , two men, located a t separate points on
the shore of Wilson Lake, heard an a i r c r a f t approaching and s t a t e d t h a t the
engine was sputtering and missing and t h a t the a i r c r a f t was losing height, One
of these witnesses s t a t e d t h a t j u s t before the a i r c r a f t went out of s i g h t it
banked steeply t o the r i g h t and then went i n t o a spino A fourth man i n h i s
cabin a t Milne Lake, heard an engine r o a r very loudly and then fade out three
times* The sound seemed t o be q u i t e close and he stepped out the door j u s t i n
time t o see the a i r c r a f t h i t the ground t h i r t y feet' awayo F i r e broke out
immediately and i n a matter of secondsthe a i r c r a f t was a mass of flameo
ICAO Circular 1 8 - ~ / 1 5
17
Investination and Evidence
The p i l o t , a i r engineer, and three passengers were f a t a l l y injuredo The
a i r c r a f t was written off,
The condition of the propeller indicated t h a t very l i t t l e power was being
developed a t the time of impact, The carburettor had been damaged by f i r e , and
the f u e l f i l t e r s could not be foundo There was s t i l l f u e l i n the tanks even
a f t e r the f i r e o The a i r c r a f t landed i n a small clearing surrounded by t r e e s
and cottages, and d id not move more than three f e e t from the point of i n i t i a l
contacto Weather was not conaidered t o have been a contributing factor.
The a i r c r a f t was overloaded by an estimated 173 pounds a t the time of the
accidento
The p i l o t transmitted the d i s t r e s s signal "MAYDAYn but no d e t a i l s of the
emergency were given
Between the' point where the engine was f i r s t reported t o have been
malfunctioning and the location of the accident, the a i r c r a f t passed over two
lakes which could have provided adequate space f o r a successful forced landing.
Gonclusions
The immediate cause of the aecident would appear t o be t h a t the engine
f a i l e d t o supply s u f f i c i e n t power t o maintain heighto
The major contributing f a c t o r would appear t o be poor judgrnent on the p a r t
of the p i l o t i n continuing the f l i g h t beyond two l a k e s where a forced landing
could have been made, a f t e r it became evident t h a t the engine was not operating
i n a normal mannero