Using Reserve Fuel (737NG)
Thread Starter
Join Date: Mar 2004
Location: Denmark
Posts: 76
Likes: 0
Received 0 Likes
on
0 Posts
Using Reserve Fuel (737NG)
Hi guys..
I have a quick question
When landing, I have once or twice come across the message "Using reserve fuel" in the FMC, without being below the amount entered in the Perf page.
I.e. getting the message when landing with 2,6 with reserve fuel of 2,4. Message comes immediately after touchdown..
Thank You
I have a quick question
When landing, I have once or twice come across the message "Using reserve fuel" in the FMC, without being below the amount entered in the Perf page.
I.e. getting the message when landing with 2,6 with reserve fuel of 2,4. Message comes immediately after touchdown..
Thank You
Join Date: May 2012
Location: 41,000 ft.
Posts: 24
Likes: 0
Received 0 Likes
on
0 Posts
Note that you may be carrying an amount of fuel greater than the reserve value you have supplied to the FMC but it may have calculated that the fuel quantity will be lower than that value by the time you are on terra-firma and hence the message.
Just a speculation. I am not too sure about this...
Just a speculation. I am not too sure about this...
Last edited by flyboy410; 7th Aug 2012 at 18:39.
Thread Starter
Join Date: Mar 2004
Location: Denmark
Posts: 76
Likes: 0
Received 0 Likes
on
0 Posts
Thank you for your reply. But the message does not show until I am on terra-firma... And can read of the instruments (and FMC), that the fuel is more than reserve!
Per Ardua ad Astraeus
Join Date: Mar 2000
Location: UK
Posts: 18,579
Likes: 0
Received 0 Likes
on
0 Posts
henrik - I saw it happen quite a few times and just ignored it. I have no explanation other than a glitch in the great god 'software'. If your concern is to do with data monitoring I would forget it. Your tech log shut down fuel should silence any excitement.
Join Date: Jun 2010
Location: Brisbane, Australia
Posts: 304
Likes: 0
Received 0 Likes
on
0 Posts
The USING RSV FUEL alert from the FMC indicates that the PREDICTED fuel remaining at destination is less than the reserves entry on the PERF INIT page during preflight prep.
That's the way I know it...
Then of course, touchdown is not exactly at your destination as far as the FMC destination position is concerned, is it!
EW73
That's the way I know it...
Then of course, touchdown is not exactly at your destination as far as the FMC destination position is concerned, is it!
EW73
Last edited by EW73; 9th Aug 2012 at 02:41.
Per Ardua ad Astraeus
Join Date: Mar 2000
Location: UK
Posts: 18,579
Likes: 0
Received 0 Likes
on
0 Posts
Then of course, touchdown is not exactly at your destination as far as the FMC destination position is concerned, is it!
TightYorksherMan
Join Date: May 2002
Location: Peak District
Age: 41
Posts: 1,570
Likes: 0
Received 0 Likes
on
0 Posts
I was always told on landing the fuel "sloshes" around therefore shows an inaccurate reading until you've stopped! Always works out that way.
