Military flight crew in a C141 experiences loss of aircraft control.

Attributes
ACN	315005
Time
Date	199507
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : czeg
State Reference	BC
Altitude	msl bound lower : 12000 msl bound upper : 41000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : czeg
Operator	other
Make Model Name	Starlifter (C141)
Operating Under FAR Part	other : other
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute airway : czeg enroute other
Flight Plan	IFR
Person 1
Affiliation	government : military
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : military
Experience	flight time total : 13000
ASRS Report	315005
Person 2
Affiliation	government : military
Function	flight crew : first officer
Qualification	pilot : military
Events
Anomaly	aircraft equipment problem : critical altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : regained aircraft control flight crew : declared emergency
Consequence	other
Supplementary
Primary Problem	Aircraft

Narrative:

This is in response to investigation of upsets. In the mid 70's we had a 141 roll over at 41000 ft, went supersonic in the dive and pulled out at 12000 ft. I believe it was attributed to a bad yaw damper. Aircraft and pilots were in my squadron at xyz AFB.

Original NASA ASRS Text

Title: MIL FLC IN A C141 EXPERIENCES LOSS OF ACFT CTL.

Narrative: THIS IS IN RESPONSE TO INVESTIGATION OF UPSETS. IN THE MID 70'S WE HAD A 141 ROLL OVER AT 41000 FT, WENT SUPERSONIC IN THE DIVE AND PULLED OUT AT 12000 FT. I BELIEVE IT WAS ATTRIBUTED TO A BAD YAW DAMPER. ACFT AND PLTS WERE IN MY SQUADRON AT XYZ AFB.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.