Inadvertent go around mode activation on advtech cpr medium large transport leads to altitude excurs...

Attributes
ACN	163472
Time
Date	199011
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : cle
State Reference	OH
Altitude	msl bound lower : 39000 msl bound upper : 39400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob
Operator	general aviation : corporate
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 90 flight time total : 13100 flight time type : 45
ASRS Report	163472
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were level at FL390 on a training flight from savannah, GA, to detroit willow run. A phase ii modification had just been completed to the cpr light transport incorporating, among many changes to the FMS and autothrottles. While we were in steady state level flight, the go around button was hit by accident by a clip board; this caused the autoplt to disengage and the throttles to advance to takeoff thrust. Following the confusion of the moment the aircraft started to climb, due to acceleration caused by the advancement of the autothrottles. By the time we reengaged the autoplt and stopped the climb, we had gained about 400'.

Original NASA ASRS Text

Title: INADVERTENT GO AROUND MODE ACTIVATION ON ADVTECH CPR MLG LEADS TO ALT EXCURSION.

Narrative: WE WERE LEVEL AT FL390 ON A TRNING FLT FROM SAVANNAH, GA, TO DETROIT WILLOW RUN. A PHASE II MODIFICATION HAD JUST BEEN COMPLETED TO THE CPR LTT INCORPORATING, AMONG MANY CHANGES TO THE FMS AND AUTOTHROTTLES. WHILE WE WERE IN STEADY STATE LEVEL FLT, THE GO AROUND BUTTON WAS HIT BY ACCIDENT BY A CLIP BOARD; THIS CAUSED THE AUTOPLT TO DISENGAGE AND THE THROTTLES TO ADVANCE TO TKOF THRUST. FOLLOWING THE CONFUSION OF THE MOMENT THE ACFT STARTED TO CLB, DUE TO ACCELERATION CAUSED BY THE ADVANCEMENT OF THE AUTOTHROTTLES. BY THE TIME WE REENGAGED THE AUTOPLT AND STOPPED THE CLB, WE HAD GAINED ABOUT 400'.

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.

Inadvertent go around mode activation on advtech cpr medium large transport leads to altitude excursion.