<< >> NASA ASRS Report 515770, June 2001

A B757 first officer reported that the captain was hand flying and overshot the assigned altitude by 700 ft due to avoiding thunderstorms.

Attributes
ACN	515770
Time
Date	200106
Day	Mon
Local Time Of Day	1801 To 2400
Place
State Reference	CO
Altitude	msl single value : 27000
Environment
Flight Conditions	Mixed
Light	Dusk
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer pilot : multi engine
Experience	flight time last 90 days : 150 flight time total : 7500 flight time type : 1500
ASRS Report	515770
Events
Anomaly	altitude deviation : overshoot inflight encounter : weather non adherence : published procedure non adherence : far non adherence : company policies non adherence : clearance
Resolutory Action	flight crew : returned to assigned altitude
Supplementary
Problem Areas	Flight Crew Human Performance Weather
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Overshot leveloff altitude by 700 ft and returned immediately to FL270. Captain was hand flying to avoid thunderstorms in the area, and I was entering a new clearance into the FMC. There was no intervention from ATC nor any conflict with any other aircraft. 10 hours into a challenging duty day, so fatigue could have been a factor as well as distrs caused by the WX, use of radar, and programming the FMC. Situation may have been prevented by use of autoplt, delaying programming of the FMC near leveloff altitude, and closer adherence to SOP's.

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Original NASA ASRS Text

Title: A B757 FO RPTED THAT THE CAPT WAS HAND FLYING AND OVERSHOT THE ASSIGNED ALT BY 700 FT DUE TO AVOIDING TSTMS.

Narrative: OVERSHOT LEVELOFF ALT BY 700 FT AND RETURNED IMMEDIATELY TO FL270. CAPT WAS HAND FLYING TO AVOID TSTMS IN THE AREA, AND I WAS ENTERING A NEW CLRNC INTO THE FMC. THERE WAS NO INTERVENTION FROM ATC NOR ANY CONFLICT WITH ANY OTHER ACFT. 10 HRS INTO A CHALLENGING DUTY DAY, SO FATIGUE COULD HAVE BEEN A FACTOR AS WELL AS DISTRS CAUSED BY THE WX, USE OF RADAR, AND PROGRAMMING THE FMC. SIT MAY HAVE BEEN PREVENTED BY USE OF AUTOPLT, DELAYING PROGRAMMING OF THE FMC NEAR LEVELOFF ALT, AND CLOSER ADHERENCE TO SOP'S.

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.