An air carrier large transport flight crew overshot their assigned altitude due, in part, to turbule...

Attributes
ACN	370500
Time
Date	199705
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : iah
State Reference	TX
Altitude	msl bound lower : 5000 msl bound upper : 5350
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : iah artcc : zkc
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Route In Use	departure other departure sid : sid
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : commercial pilot : flight engineer pilot : instrument
Experience	flight time last 90 days : 260 flight time total : 9300 flight time type : 4000
ASRS Report	370500
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot inflight encounter : weather non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

Passing through 4300 ft MSL, the altitude alert sounded with 5000 ft set in the altitude alert window. The ride was bumpy and I noticed both the captain and first officer were focused on the instruments as we were in IMC conditions. At this time I took a look at the flight engineer panel to make sure the cooling doors were full open and air mixture valves were full cold. Since it was so hot and bumpy I wanted to make sure the passenger were getting as much cool air as possible. I looked back at the forward instrument panel and altimeter just as the first officer was leveling out at 5000 ft. At this time we encountered some turbulence which pushed us past 5000 ft. Both the captain and first officer pushed forward on the yoke to keep us level, but the altimeter showed 5350 ft before starting back down.

Original NASA ASRS Text

Title: AN ACR LGT FLC OVERSHOT THEIR ASSIGNED ALT DUE, IN PART, TO TURB.

Narrative: PASSING THROUGH 4300 FT MSL, THE ALT ALERT SOUNDED WITH 5000 FT SET IN THE ALT ALERT WINDOW. THE RIDE WAS BUMPY AND I NOTICED BOTH THE CAPT AND FO WERE FOCUSED ON THE INSTS AS WE WERE IN IMC CONDITIONS. AT THIS TIME I TOOK A LOOK AT THE FE PANEL TO MAKE SURE THE COOLING DOORS WERE FULL OPEN AND AIR MIXTURE VALVES WERE FULL COLD. SINCE IT WAS SO HOT AND BUMPY I WANTED TO MAKE SURE THE PAX WERE GETTING AS MUCH COOL AIR AS POSSIBLE. I LOOKED BACK AT THE FORWARD INST PANEL AND ALTIMETER JUST AS THE FO WAS LEVELING OUT AT 5000 FT. AT THIS TIME WE ENCOUNTERED SOME TURB WHICH PUSHED US PAST 5000 FT. BOTH THE CAPT AND FO PUSHED FORWARD ON THE YOKE TO KEEP US LEVEL, BUT THE ALTIMETER SHOWED 5350 FT BEFORE STARTING BACK DOWN.

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.

An air carrier large transport flight crew overshot their assigned altitude due, in part, to turbulence.