Acro Image

Aerobatics Server

ACRO E-mail Archive Thread: [Acro] Interesting on

[International Aerobatic Club] [Communications] [Aerobatics Images]

Disclaimer: These aerobatics pages are developed by individual IAC members and do not represent official IAC policy or opinion.

[Usage Statistics]

ACRO E-mail Archive Thread: [Acro] Interesting on


Thread: [Acro] Interesting on

Message: [Acro] Interesting on

Follow-Up To: ACRO Email list (for List Members only)

From: "rklarich" <rklarich at>

Date: Tue, 29 Oct 2002 23:10:07 UTC



It's not directly acro, but sounds like it could have been.  404 souls on
board is a big number for this not to have made the news- but then again,
the pilots weren't accused of drinking and no one was hurt, no pilot error
can be discovered so once again the media is proven to not know what news
is...  Biased opinion of mine, but true.  Wonder if the pilot is just about
to turn 60....

Sorry to clog the web, tired of the debate on a picture ID- only criminals
break the real laws, no reason to make new laws.

Rich Klarich
IAC 21376

NTSB Identification: ANC03IA001

14 CFRPart 121 operation of Air Carrier NORTHWEST AIRLINES INC (D.B.A.
Northwest Airlines Inc.)
Incident occurred Wednesday, October 09, 2002 at Anchorage, AK
Aircraft:Boeing 747-400, registration: N661US
Injuries: 404 Uninjured.

This is preliminary information, subject to change, and may contain errors.
Any errors in this report will be corrected when the final report has been

On October 9, 2002, about 1740 Alaska daylight time, a Boeing 747-400
airplane, N661US, had a partial hydraulic system malfunction during cruise
flight. The flight was being conducted as Flight 85, by Northwest Airlines
Inc., as an instrument flight rules (IFR) scheduled international flight
under Title 14, CFR Part 121. The four flight crew members, fourteen flight
attendants, and the 386 passengers, were not injured. The flight originated
at the Detroit International Airport, Detroit, Michigan, about 1403 eastern
daylight time, and was bound for the Narita International Airport, Tokyo,

During an interview with the National Transportation Safety Board (NTSB)
investigator-in-charge (IIC), on October 10, 2002, the captain said the
airplane was at cruise altitude of approximately 35,000 feet with the
autopilot engaged, when it abruptly rolled into a 30 to 40 degree left bank.
He said there were indications that the lower rudder went to full left
authority and remained there. He said he declared an emergency and diverted
the airplane to the Ted Stevens International Airport, Anchorage, Alaska.
The captain said he and the first officer ran through several emergency
procedures, but could not correct the problem. He said as the airspeed
decreased during the approach to landing, the lower rudder deflected further
to the left. He said the rudder deflected left to a point where full right
upper rudder and right aileron could no longer hold the airplane on course,
and he used asymmetric engine thrust to maintain the correct heading. The
captain said after landing, he saw the lower rudder was still deflected
fully to the left.

During an inspection of the airplane by the IIC on October 10, the cast
metal housing of the lower rudder control module was observed to be broken.
The end portion of the control module housing, that houses the yaw damper
actuator, had completely broken away from the main portion of the housing.
The end which was broken off contained a metal plug that was safety wired to
the main housing. The separated portion of the housing was still attached to
the main portion of the housing by the safety wire.

The lower rudder control module and the flight data recorder were removed
from the airplane, and sent to the NTSB laboratory for analysis.


© Dr. Günther Eichhorn
Email Guenther Eichhorn