Spectators Balcony (Spotters Corner) If you're not a professional pilot but want to discuss issues about the job, this is the best place to loiter. You won't be moved on by 'security' and there'll be plenty of experts to answer any questions.

Boeing Test Registrations

Old 16th Jun 2020, 07:47
  #1 (permalink)  
Thread Starter
 
Join Date: Jan 2005
Location: Hotel this week, hotel next week, home whenever...
Posts: 1,364
Boeing Test Registrations

I thought these were “unique” until the aircraft was delivered then re-used but...

trawling through street view on google maps around Renton there are several instances of N1786B with different “fleet” numbers and different customers livery or parts thereof. The images all come from May 2019 and don’t appear to be doctored at all but I am no image specialist.






Can anyone explain the system to me.... ( yep, I’m bored!)
Duchess_Driver is offline  
Old 16th Jun 2020, 09:18
  #2 (permalink)  
 
Join Date: Jul 2010
Location: Freedom Sound
Posts: 225
They could be using the Boeing Line number as Reg, line number being the number given to each aircraft as it is manufactured on the Boeing production line and then is also specifically used for identification purposes in the manuals.
esscee is offline  
Old 16th Jun 2020, 09:24
  #3 (permalink)  
 
Join Date: Oct 2007
Location: Oil Capital of Central Scotland
Age: 53
Posts: 440
I guess that you can paint whatever you like on the side of the hull, whenever you like, just so long as there's only one combination of registration and MSN in the air or with live transponder on the ground at any given period. Possibly just a case of Boeing, with better visibility of the relative completion states, production and delivery schedules for these MSN's than us mere mortals just finishing off the livery enough for each to take it's sequence of test & pre-delivery flights in turn under the same recyclable registration.
Donkey497 is offline  
Old 16th Jun 2020, 11:33
  #4 (permalink)  
 
Join Date: Jan 2008
Location: Reading, UK
Posts: 11,761
Originally Posted by esscee View Post
They could be using the Boeing Line number as Reg, line number being the number given to each aircraft as it is manufactured on the Boeing production line and then is also specifically used for identification purposes in the manuals.
Boeing don't use Line Numbers as registrations (l/n 1786 was an NG built in 2005) and, as with all manufacturers, it's the serial number (MSN) that is used to identify individual aircraft in technical publications, ADs, etc.
DaveReidUK is online now  
Old 16th Jun 2020, 16:15
  #5 (permalink)  
 
Join Date: Jan 2007
Location: EGLL
Posts: 426
FAA allows re-use of N nrs, example FAA's own N1 has adorned a number of cabs over time. So no surprise for Boeing test regs (as with Airbus F-Wxxx and D-Axxx)
G-ARZG is offline  
Old 16th Jun 2020, 21:35
  #6 (permalink)  
 
Join Date: Oct 2000
Location: Exeter UK
Posts: 236
I visited Renton in August 2019 and yes, there were several 737Max with the same test registrations. N1786B was noted on 19 different airframes parked around the airfield and outside the factory. The registration marks N1787B, N1798B and N1796B were also noted on single airframes.
EGTE is online now  
Old 16th Jun 2020, 21:43
  #7 (permalink)  
Thread Starter
 
Join Date: Jan 2005
Location: Hotel this week, hotel next week, home whenever...
Posts: 1,364
You can see the line number above the hold, and this is different to the actual MSN for the aircraft which (I imagine) run sequentially across all product lines (73, 74, 77 and 78)

Well, if it was painted 19 times then....

Possibly just a case of Boeing, with better visibility of the relative completion states, production and delivery schedules for these MSN's than us mere mortals just finishing off the livery enough for each to take it's sequence of test & pre-delivery...
doesn’t quite fit.


Duchess_Driver is offline  
Old 4th Jul 2020, 22:16
  #8 (permalink)  
 
Join Date: Jan 2013
Location: Seattle Area
Posts: 204
It's listed in the FAA registry as a manufacturer's temporary registration number held by Boeing. Some of the 737s are painted at the Renton factory. Some are flown a few miles away to a paint hangar at Boeing field. I suspect they use this number and others for the short flight to the paint hangar or any other flying before it is painted. Once it's painted it would have the customer's registration number on it, but still could be flown for acceptance or test flights with a different temporary N number issued to Boeing.
Dave Therhino 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.