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Subject: Re: [LML] Fuel flow issue
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Scott,

I recommend you do not fly until you figure it out. High speed taxis on long runways only. Fuel flow is important to flight and is an abort criteria. What should your fuel flow be for takeoff power? It is specifed in the manual.

Jeff


-----Original Message-----
From: Scott Keighan <scottekeighan@sympatico.ca>
To: lml@lancaironline.net
Sent: Sun, Jul 19, 2009 9:34 pm
Subject: [LML] Fuel flow issue



I have a question.

Today while flying my first take off was normal.? The second take off my fuel flow

on takeoff?went up to 19.0gph then back down to 12.2 after rotation then

slowly went back to normal.? Cruised around ok for 15 min then back to the airport

for a couple of circuits.? No electric boost pump except I turned it on for landing.?

Next take off the same thing but max?Flow on take off was 18.5gph for half a second then

it went back down to 14.5.? Turn on the electric boost and within 2 seconds its back up to 20.5gph.

Landed and on a back track for another circuit the engine stalled.? Restarted right away with

no issues.? Next circuit same issue.? Up to 18.0gph then down to 15.0 while rolling down

the runway, hit the boost pump and within 2 seconds all is well.? On downwind switch the

boost pump off and the fuel flow stays in normal ranges.? Take off left or right tank, same issue.

Fuel 25 gal in each tank. 

?

Fuel pressure stays normal the?whole time.? I checked for water in the tanks and gascolator.

I checked underneath the cowl for anything out of place.

?

Engine fuel pump rebuild required??? What do you think??

Any advise would be appreciated. 

?

Thanks

Scott K

IO-550-G??


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Scott,<br>
<br>
I recommend you do not fly until you figure it out. High speed taxis on long runways only. Fuel flow is important to flight and is an abort criteria. What should your fuel flow be for takeoff power? It is specifed in the manual.<br>
<br>
Jeff<br>
<br>
<br>
-----Original Message-----<br>
From: Scott Keighan &lt;scottekeighan@sympatico.ca&gt;<br>
To: lml@lancaironline.net<br>
Sent: Sun, Jul 19, 2009 9:34 pm<br>
Subject: [LML] Fuel flow issue<br>
<br>


<div id=AOLMsgPart_2_aaf81edc-25e0-4884-8cbd-2768a84ab8dc>

<div><FONT face=Arial size=2>I have a question.</FONT></div>


<div><FONT face=Arial size=2>Today while flying my first take off was normal.&nbsp; The second take off my fuel flow</FONT></div>


<div><FONT face=Arial size=2>on takeoff&nbsp;went up to 19.0gph then back down to 12.2 after rotation then</FONT></div>


<div><FONT face=Arial size=2>slowly went back to normal.&nbsp; Cruised around ok for 15 min then back to the airport</FONT></div>


<div><FONT face=Arial size=2>for a couple of circuits.&nbsp; No electric boost pump except I turned it on for landing.&nbsp;</FONT></div>


<div><FONT face=Arial size=2>Next take off the same thing but max&nbsp;Flow on take off was 18.5gph for half a second then</FONT></div>


<div><FONT face=Arial size=2>it went back down to 14.5.&nbsp; Turn on the electric boost and within 2 seconds its back up to 20.5gph.</FONT></div>


<div><FONT face=Arial size=2>Landed and on a back track for another circuit the engine stalled.&nbsp; Restarted right away with</FONT></div>


<div><FONT face=Arial size=2>no issues.&nbsp; Next circuit same issue.&nbsp; Up to 18.0gph then down to 15.0 while rolling down</FONT></div>


<div><FONT face=Arial size=2>the runway, hit the boost pump and within 2 seconds all is well.&nbsp; On downwind switch the</FONT></div>


<div><FONT face=Arial size=2>boost pump off and the fuel flow stays in normal ranges.&nbsp; Take off left or right tank, same issue.</FONT></div>


<div><FONT face=Arial size=2>Fuel 25 gal in each tank. </FONT></div>


<div>&nbsp;</div>


<div><FONT face=Arial size=2>Fuel pressure stays normal the&nbsp;whole time.&nbsp; I checked for water in the tanks and gascolator.</FONT></div>


<div><FONT face=Arial size=2>I checked underneath the cowl for anything out of place.</FONT></div>


<div><FONT face=Arial size=2></FONT>&nbsp;</div>


<div><FONT face=Arial size=2>Engine fuel pump rebuild required??&nbsp; What do you think??</FONT></div>


<div><FONT face=Arial size=2>Any advise would be appreciated. </FONT></div>


<div><FONT face=Arial size=2></FONT>&nbsp;</div>


<div><FONT face=Arial size=2>Thanks</FONT></div>


<div><FONT face=Arial size=2>Scott K</FONT></div>


<div><FONT face=Arial size=2>IO-550-G</FONT>&nbsp;&nbsp;</div>
</div>
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