Go Back  PPRuNe Forums > Flight Deck Forums > Tech Log
Reload this Page >

B787 minimum Oxygen pressure and ENG Oil for dispatch

Wikiposts
Search
Tech Log The very best in practical technical discussion on the web

B787 minimum Oxygen pressure and ENG Oil for dispatch

Thread Tools
 
Search this Thread
 
Old 6th Mar 2022, 07:54
  #1 (permalink)  
Thread Starter
 
Join Date: Sep 2009
Location: ToraBora
Posts: 7
Likes: 0
Received 0 Likes on 0 Posts
B787 minimum Oxygen pressure and ENG Oil for dispatch

B787 FCOM states:
Verify that the following are sufficient for flight:
  • Oxygen pressure
  • Hydraulic quantity
  • Engine oil quantity
The Crew Oxygen Requirements section of the FCOM is rather complex for the crew to calculate the minimum requirement before every leg (6 tables spanning across 3 pages is an overkill!).
Unlike other aircraft types, the B787 FCOM does not define what is considered sufficient when it comes to engine oil.
For both oxygen pressure and oil quantity:
  1. any idea where to find more information about this? The FCOM is supposed to provide sufficient guidance for the crew to operate an aircraft safely and legally, but it looks like Boeing has a different concept!
  2. Have your airline established a specific baseline figure for the crew? If so, are these figures added to the FCOM or in a separate SOP document?
frustratedpilot is offline  
Old 6th Mar 2022, 08:35
  #2 (permalink)  
 
Join Date: Jun 2001
Location: OZ
Posts: 1,129
Received 12 Likes on 6 Posts
That looks like an excellent question for your fleet manager.
mustafagander is offline  
Old 6th Mar 2022, 10:47
  #3 (permalink)  
 
Join Date: Dec 2003
Location: Tring, UK
Posts: 1,847
Received 2 Likes on 2 Posts
On the 777 it shows LO against a highlighted oil quantity and RF against hydraulic quantity if the aircraft thinks they need servicing. Not sure if the 787 is similar? For us, fluid replenishment is an Engineering-only function and the FCOM does not define a minimum quantity for RR engines.
FullWings is offline  
Old 6th Mar 2022, 12:00
  #4 (permalink)  
 
Join Date: Oct 2009
Location: Australia the Awesome
Posts: 399
Received 0 Likes on 0 Posts
Oil quantity

I seem to remember Oil qty was 13 Q +.5Q for every hour of flight
Roj approved is offline  
Old 7th Mar 2022, 03:18
  #5 (permalink)  
Thread Starter
 
Join Date: Sep 2009
Location: ToraBora
Posts: 7
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by FullWings
On the 777 it shows LO against a highlighted oil quantity and RF against hydraulic quantity if the aircraft thinks they need servicing. Not sure if the 787 is similar? For us, fluid replenishment is an Engineering-only function and the FCOM does not define a minimum quantity for RR engines.
Thanks FullEings.
Same on the 787, but waiting for the LO and RF indication is like taking whatever fuel in tanks and deciding where to go when the low fuel indication triggers
The crew are responsible for applying the FCOM procedures. I am not sure if airlines are permitted to modify this section of the FCOM; but I think Boeing should either provide sufficient guidance or remove the write-up from the FCOM if this is an engineering responsibility.
frustratedpilot is offline  
Old 7th Mar 2022, 03:22
  #6 (permalink)  
Thread Starter
 
Join Date: Sep 2009
Location: ToraBora
Posts: 7
Likes: 0
Received 0 Likes on 0 Posts
Thanks Roj approved. This seems logical, and I recall seeing something similar on other airplanes, but can't find any reference for the 787.
frustratedpilot is offline  
Old 7th Mar 2022, 05:18
  #7 (permalink)  
 
Join Date: Oct 2009
Location: Australia the Awesome
Posts: 399
Received 0 Likes on 0 Posts
I've been off the aircraft for 4 years, so my memory isn't accurate.

Turns out it is in the "Company Procedures section" of the FCOM
• Carry out the remainder of the preliminary preflight procedures
(indicated engine oil quantity must be at least 12 liters plus 0.25 liters
per planned flight hour);
Roj approved is offline  
Old 8th Mar 2022, 15:51
  #8 (permalink)  
 
Join Date: Jul 2000
Location: My views - Not my employer!
Posts: 1,031
Likes: 0
Received 0 Likes on 0 Posts
Our MEL in the oxygen section contains the minimum figures for dispatch ex base and downroute...
Cough is offline  
Old 8th Mar 2022, 16:36
  #9 (permalink)  
 
Join Date: Sep 2001
Location: Blighty
Posts: 788
Received 87 Likes on 22 Posts
Engine Oil. Min recommended EICAS 12 QTS (GEnX)
However, if its ETOPS maintained then it should be serviced to full at each Transit check. Approx 21 on EICAS.

APU OIL LIMITS.


RUNNING. 3,75 OFF. 8.0

MAY BE OPERATED FOR 26HRS (if below)

AMM 12-13-04

Below 8.0 or 3.75 REFILL.



Two Crew Oxygen Requirements.

Min approx 500psi/660L

These are the requirements for one particular airline. EASA 145 approved.







HOVIS 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



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.