Mdt air carrier jet overshoots 3000 ft altitude when altitude capture feature on autoplt fails to level aircraft at 3000 ft. TCASII RA creates a further altitude deviation in a climb maneuver. Flight crew advises ATC of deviation.

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Attributes
ACN	363684
Time
Date	199703
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : orf
State Reference	VA
Altitude	msl bound lower : 3000 msl bound upper : 3400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : orf tower : clt
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Route In Use	departure other enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	other : unknown
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : cfi pilot : atp
Experience	flight time last 90 days : 180 flight time total : 7600 flight time type : 620
ASRS Report	363684
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 15900 flight time type : 4000
ASRS Report	363685
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 500
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation other

Narrative:

XA45 local (orf). Assigned 3000 ft by departure. Aircraft on autoflt mode (autoplt) did not capture. At 3400 ft, we started pushover then got TCASII alert, then TCASII climb resolution. We then continued climb and notified departure.

Original NASA ASRS Text

Title: MDT ACR JET OVERSHOOTS 3000 FT ALT WHEN ALT CAPTURE FEATURE ON AUTOPLT FAILS TO LEVEL ACFT AT 3000 FT. TCASII RA CREATES A FURTHER ALTDEV IN A CLB MANEUVER. FLC ADVISES ATC OF DEV.

Narrative: XA45 LCL (ORF). ASSIGNED 3000 FT BY DEP. ACFT ON AUTOFLT MODE (AUTOPLT) DID NOT CAPTURE. AT 3400 FT, WE STARTED PUSHOVER THEN GOT TCASII ALERT, THEN TCASII CLB RESOLUTION. WE THEN CONTINUED CLB AND NOTIFIED DEP.

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.