Go Back  PPRuNe Forums > Ground & Other Ops Forums > Questions
Reload this Page >

Apu start while refuelling

Questions If you are a professional pilot or your work involves professional aviation please use this forum for questions. Enthusiasts, please use the 'Spectators Balcony' forum.

Apu start while refuelling

Old 31st Jul 2015, 19:59
  #1 (permalink)  
Thread Starter
Join Date: Dec 2013
Location: Milan
Posts: 41
Apu start while refuelling

Hi guys,

I can't find any reference, I knew previously (A320) it was avoided starting Apu while refuelling. Now I see most captain starting without any problem, just some of them prefer delay the bleed on after refuelling ended. Is there any reference that forbids turning on Apu BLEED while refu?
easymxp is offline  
Old 1st Aug 2015, 16:11
  #2 (permalink)  
Join Date: Apr 2004
Location: near EDDF
Posts: 775
AMM Task 12-11-28-650-001-A General Refuel/Defuel Safety Procedures:
(19) Auxiliary Power Unit (APU) starts or shutdowns are permitted during refuel/ defuel procedures. If it is necessary to operate the APU, the limits that follow apply:
     (a) An APU start is not permitted during a refuel/defuel procedure if the APU has failed to start or an automatic shutdown has occurred.
     (b) You must complete a normal APU shutdown if a fuel spill has occurred during the refuel/defuel procedure.
IFixPlanes is offline  
Old 3rd Aug 2015, 01:35
  #3 (permalink)  
Join Date: Aug 2006
Location: South
Posts: 636
Always made me laugh this one.

The aircraft being refuelled strictly forbidden, No HF or APU start while refuelling. However no limitations on the jet next door starting APU, engines, connecting or disconnecting power, keying their HF or testing a RADAR. Or for that matter the JCPL, baggage tugs, aircraft tugs, catering trucks etc starting while attached or working around said aircraft.
c100driver is offline  
Old 4th Aug 2015, 12:36
  #4 (permalink)  
Join Date: Nov 2001
Location: Delta of Venus
Posts: 456
Yes indeed. SOP's like that don't exactly show a lot of confidence in the integrity of the equipment...
No doubt comes from the same school of BS thought processes that gave us "It is forbidden to use mobile phones in a petrol station"
Private jet is offline  
Old 5th Aug 2015, 14:16
  #5 (permalink)  
Join Date: Apr 2009
Location: UK
Posts: 458
Yep our Ops Manual prohibits us starting it up which goes against the FCOM and AMM as stated earlier. Over cautious perhaps, but I tend not to lose sleep over these things. I find there are much bigger issues with company ops manuals and procedures than starting an apu.
MCDU2 is offline  
Old 5th Aug 2015, 17:28
  #6 (permalink)  
Thread Starter
Join Date: Dec 2013
Location: Milan
Posts: 41
Yep, that's true, it's not a big issue usually. But these days, in Milan 35 degrees, it's very useful and during crew change, where apu is usually turned off, turning on as soon as possible-even if we're refuelling- it's a relief )
easymxp is offline  
Old 15th Aug 2015, 12:14
  #7 (permalink)  
Join Date: Feb 2002
Location: UK
Age: 55
Posts: 2,903
For what it's worth..
My local airport states that APUs should not be started if the exhaust is within (15?) meters of the fuel tank vents. In practice this means that on most a/c APU start is not a problem. A330 with the stab tank is a possible exception, I haven't bothered to measure the distance.

However, as a general rule, APU shouldn't be started during refuelling on a/c that automatically do a power change over from GPU to APU due to the autorefuelling preset could glitch. It's not the end of the world but it has caused delays.

Good airmanship etc....
TURIN is offline  
Old 15th Aug 2015, 12:23
  #8 (permalink)  
Join Date: Jan 2010
Location: Big Bay
Age: 68
Posts: 1
Apu start during fueling

Although an APU start is permitted on the B747 it will depend on the company SOPs as to whether they allow it. On the B747-444 it has a NBPT ( no break power transfer) when sellecting power on, I have always felt it prudent to not put power on when fueling.
Repairmann is offline  
Old 19th Aug 2015, 11:24
  #9 (permalink)  
Join Date: Sep 2012
Location: Nowhere near Shinbone Waterhole
Posts: 201
 (b) You must complete a normal APU shutdown if a fuel spill has occurred during the refuel/defuel procedure.
Thanks for the AMM ref IFix.
mikedreamer787 is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.