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1985 JAL 747SP Crash

Sun Nov 14, 1999 6:48 am

Does anyone know any good sources of information for the crash of the Japan Airlines 747SP in 1985?

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Try Here!

Sun Nov 14, 1999 6:50 am

I hope this helps!

- Neil Harrison
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RE: Try Here!

Sun Nov 14, 1999 7:17 am

It was actually a 747SR-46, which had the standard 747 body. It was involved in a tailstrike in Osaka in 1978. It was repaired incorrectly by Boeing, through the use of single instead of double rivets on the rear pressure bulkhead.
The aircraft took off on the 12/8/85, operating JL123 to Osaka from Haneda. Its rear pressure bulkhead failed and despite the best efforts of the crew, the loss of hydraulic power was such that the aircraft became uncontrollable and eventually ploughed into Mt. Osutaka, in a mountain range which was actually only about 30-40 miles east of HND, across Tokyo Bay. 520 died and 4 survived.

A Boeing metal expert subsequently discovered in tests that the number of cycles flown in a simulation, based on the repair carried out was almost exactly the same as that flown by the 747 since the Osaka incident.

RE: 1985 JAL 747SP Crash

Sun Nov 14, 1999 9:44 am

The JL123 accident is thoroughly analysed, along with other airline crashes between 1977 and 1991, in Air Disaster Volume 2 by Macarthur Job. This is published by Aerospace Publications Pty Ltd of Australia, ref. no ISBN 1 875671 19 6. This book (along with Volumes 1 & 3) is highly recommended.
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RE: 1985 JAL 747SP Crash

Sun Nov 14, 1999 10:34 am

Kaitak is right. Like he explained, the disaster was due to a bulk pressure loss as well as hydraulic power loss which made the crew unable to control the aircraft. The plane involved was a 747SR-46. It was a 747-100SR, 46 is Japan Airlines's customer number at Boeing. JAL has never had any 747-SP.

Ben Soriano
Brussels Belgium
Ben Soriano
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RE: 1985 JAL 747SP Crash

Sun Nov 14, 1999 10:42 am

Sorry about the misnomer, I accidently put 747SP instead of 747SR. Thanks to all for their input.

with humble regards
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RE: Skylinepigeon

Sun Nov 14, 1999 10:49 am

Thanks for the source Skylinepigeon. I was wondering if you knew how in depth this book is. I am in need of some fairly technical information. I checked out a website that sold this book, and it is a reasonable price, so if you can tell me a little more about it, I'll probably buy it.

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RE: 1985 JAL 747SP Crash

Sun Nov 14, 1999 11:05 am

The technical detail in Job's books is astonishing. They are three of the most fascinating books you will ever read about aviation. If you buy three books about aviation this year, make it these ones.
fly Saha Air 707s daily from Tehran's downtown Mehrabad to Mashhad, Kish Island and Ahwaz

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