Max Q
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Any 747 400D Been Converted To Regular -400?

Mon Oct 14, 2013 5:28 am

Curious to know if this has been done,


I believe the premise with the D model was that they could be converted back to the regular long range -400 model by adding the winglets and raising the weights.


Just wondered if JAL or ANA ever did this with any of their Aircraft ?
The best contribution to safety is a competent Pilot.
 
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Stitch
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RE: Any 747 400D Been Converted To Regular -400?

Mon Oct 14, 2013 10:30 am

Quoting Max Q (Thread starter):
Just wondered if JAL or ANA ever did this with any of their Aircraft ?

ANA definitely did. Not sure about JAL.
 
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Web500sjc
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RE: Any 747 400D Been Converted To Regular -400?

Mon Oct 14, 2013 6:10 pm

Wasn't the 400D mostly a paper change? I know they took the winglets off but not much else was changed?
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Stitch
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RE: Any 747 400D Been Converted To Regular -400?

Mon Oct 14, 2013 7:48 pm

Quoting Web500sjc (Reply 2):
Wasn't the 400D mostly a paper change? I know they took the winglets off but not much else was changed?

I believe there were modifications to the undercarriage and other cycle-limited parts to increase their longevity. The upper deck window belt is also longer due to the aft space normally used for the galley instead having seating.
 
Viscount724
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RE: Any 747 400D Been Converted To Regular -400?

Mon Oct 14, 2013 11:52 pm

Quoting Web500sjc (Reply 2):
Wasn't the 400D mostly a paper change? I know they took the winglets off but not much else was changed?

Not just the winglets. Also the wingtip extensions the winglets were attached to.
 
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747classic
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RE: Any 747 400D Been Converted To Regular -400?

Tue Oct 15, 2013 3:46 pm

In total nineteen 747-400D aircraft were produced (11x ANA, 8x JAL) :

844 25213 747-446D R2901 RU801 JAL
879 25214 747-446D R2902 RU802 JAL
891 25292 747-481D R2903 RU831 ANA
907 26347 747-446D R2904 RU803 JAL
914 25639 747-481D R2905 RU832 ANA, converted to -481 12/2001
920 25640 747-481D R2906 RU833 ANA
927 25642 747-481D R2907 RU834 ANA
935 26345 747-446D R2908 RU804 JAL
941 26348 747-446D R2909 RU805 JAL
948 26349 747-446D R2910 RU806 JAL
952 25646 747-481D R2911 RU835 ANA
963 26351 747-446D R2912 RU807 JAL
972 25643 747-481D R2913 RU836 ANA
975 25644 747-481D R2914 RU837 ANA
978 26352 747-446D R2915 RU808 JAL
991 25647 747-481D R2916 RU838 ANA
996 27163 747-481D R2917 RU839 ANA
1060 27436 747-481D R2919 RU840 ANA
1066 27442 747-481D R2920 RU841 ANA

The only airframe that I could prove to be converted to the long range configuration is L/N914. this airframe was converted in 12/2001 . The airframe was scrapped after a cargo fire inside a hangar at BKK, see : http://aviation-safety.net/database/record.php?id=20080803-0


The other way around : ANA modified two 747-481 aircraft to the 481D configuration (shortend wing + removal of the winglets), to produce a short haul aircraft in 2003 at the former Boeing Military Airplanes facility (Wichita).
However the fuselage was AFAIK not fully upgraded to the real 744D's specification.
Both aircraft are already sold and converted again by Bedek, now as a 747-481BDSF(again with wingextension and winglets) before the cycle count became to high.
Aircraft involved :
1133 28282 747-481 R2716 RT756 ANA
1142 28283 747-481 R2724 RT757 ANA

[Edited 2013-10-15 08:50:28]
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Tod
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RE: Any 747 400D Been Converted To Regular -400?

Wed Oct 16, 2013 2:05 pm

Heath Tecna and KLM teamed up to turn six ex-UAL 744 into 400D style high density aircraft for Corsair.
586 seats IIRC.
No wing mods since Corsair still wanted long haul efficiency.

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