Crj crew had an altitude overshoot when the crew was distraction in ord class B.

Attributes
ACN	630882
Time
Date	200409
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ord.airport
State Reference	IL
Altitude	msl bound lower : 5000 msl bound upper : 5500
Aircraft 1
Controlling Facilities	tracon : c90.tracon
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	630882
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	630874
Events
Anomaly	altitude deviation : excursion from assigned altitude altitude deviation : overshoot non adherence : clearance non adherence : company policies non adherence : far non adherence : published procedure
Independent Detector	atc equipment other atc equipment : radar aircraft equipment : altitude alert other controllera
Resolutory Action	controller : issued alert flight crew : returned to assigned altitude
Consequence	other
Supplementary
Problem Areas	Company ATC Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Altitude excursion. We had initial clearance to 5000 ft from clearance delivery. Immediately on climb at 600 ft, ATC questioned position. We had wrong squawk. I believe this to be their error. We corrected to the correct squawk and turned to initial heading, about a 45 degree heading change. ATC then questioned our heading. We took off in directional gyroscope mode due to EFIS computer caution. Heading checked on runway line up. Upon query we switched to magnetic and aircraft corrected heading on flight director. I was hand flying with a 3500 vsi rate. I saw the altitude alerter flash and saw 5300 ft on alerter. I corrected promptly and we ballooned to 5500 ft. ATC questioned our altitude and first officer replied we were leveling 5000 ft. ATC said we had traffic just above us, maintain 5000 ft. There was no further discussion with ATC. This was leg 5 of a long day. We were already past 8 hours of actual flight time. We ended the flight with 9 hours 25 mins.

Original NASA ASRS Text

Title: CRJ CREW HAD AN ALT OVERSHOOT WHEN THE CREW WAS DISTR IN ORD CLASS B.

Narrative: ALT EXCURSION. WE HAD INITIAL CLRNC TO 5000 FT FROM CLRNC DELIVERY. IMMEDIATELY ON CLB AT 600 FT, ATC QUESTIONED POS. WE HAD WRONG SQUAWK. I BELIEVE THIS TO BE THEIR ERROR. WE CORRECTED TO THE CORRECT SQUAWK AND TURNED TO INITIAL HDG, ABOUT A 45 DEG HDG CHANGE. ATC THEN QUESTIONED OUR HDG. WE TOOK OFF IN DIRECTIONAL GYROSCOPE MODE DUE TO EFIS COMPUTER CAUTION. HDG CHKED ON RWY LINE UP. UPON QUERY WE SWITCHED TO MAGNETIC AND ACFT CORRECTED HDG ON FLT DIRECTOR. I WAS HAND FLYING WITH A 3500 VSI RATE. I SAW THE ALT ALERTER FLASH AND SAW 5300 FT ON ALERTER. I CORRECTED PROMPTLY AND WE BALLOONED TO 5500 FT. ATC QUESTIONED OUR ALT AND FO REPLIED WE WERE LEVELING 5000 FT. ATC SAID WE HAD TFC JUST ABOVE US, MAINTAIN 5000 FT. THERE WAS NO FURTHER DISCUSSION WITH ATC. THIS WAS LEG 5 OF A LONG DAY. WE WERE ALREADY PAST 8 HRS OF ACTUAL FLT TIME. WE ENDED THE FLT WITH 9 HRS 25 MINS.

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.