Posts: 151
Joined: Tue Aug 05, 2003 11:01 pm

How Did JA8032 Crash?

Mon Sep 01, 2003 12:07 pm

After reading this article, I still don't understand how the pilot "landed" in the water several miles short of the runway when the radio altimeter still showed 200ft AGL. Someone suggested that both altimeters failed. But when I read the NTSB report, it blamed the "Un(der)qualified" crew instead. Anyone know what's going on here?

Capt. Asoh said that he was making a coupled approach, but because of problems with his pressure altimeter, he was relying on the more accurate radio altimeter for verification of altitude. Capt. Asoh set the radio altimeter to give a light at a decision height of 211 ft (63.3 m). When the light blinked on ... he was nearly in the waters of San Francisco Bay - Richard Silagi

PROBABLE CAUSE: "The improper application of the prescribed procedures to execute an automatic-coupled ILS approach. This deviation from the prescribed procedures was, in part, due to a lack of familiarization and infrequent operation of the installed flight director and autopilot system." - NTSB AAR-70-02
Tower: "Cessna xxxx, state your intentions", Cessna: "To become airline pilot"
Posts: 1278
Joined: Tue Oct 16, 2001 4:05 pm

RE: How Did JA8032 Crash?

Mon Sep 01, 2003 2:54 pm

If you are on an normal approach with a fully laden airliner, 200' is not a big vertical distance. Often, go arounds that are conducted below 100' RA, the a/c is expected to actually make contact with the surface before actually climbing (because of inertia and turbine thrust lag). The other thing to consider is that the radio altimeter is usually mounted in the forward section of the a/c, and would give an indication that is higher than the actual aircraft height AGL if the nose was in even a slight pitch up attitude.

I would assume that, when the a/c was on the approach, the captain would think that he was on the g/s, and when he was surprised to find that he was still over the water, the reaction time in this case would have suffered a bit. Again, 200' with a normal jet descent rate won't give you a lot of time to make a decision and react.
Posts: 151
Joined: Tue Aug 05, 2003 11:01 pm

RE: How Did JA8032 Crash?

Tue Sep 02, 2003 6:24 am

Thank you for that explanation, Buckfifty.  Smile/happy/getting dizzy
Tower: "Cessna xxxx, state your intentions", Cessna: "To become airline pilot"
Posts: 3454
Joined: Sun Jun 24, 2001 4:44 am

RE: How Did JA8032 Crash?

Tue Sep 02, 2003 1:02 pm

Especially considering the sink rate of a jetliner established on a normal ILS approach is somewhere around 700-750fpm  Smile/happy/getting dizzy
I got my head checked--by a jumbo jet

Who is online

Users browsing this forum: longhauler and 1 guest

Popular Searches On

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos