LR60 crew overshot their cleared altitude and got a TCASII RA with conflicting traffic.

Attributes
ACN	463240
Time
Date	200002
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : uin.airport
State Reference	IL
Altitude	msl bound lower : 21000 msl bound upper : 22600
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc.artcc
Operator	general aviation : corporate
Make Model Name	Learjet 35
Operating Under FAR Part	Part 91
Flight Phase	climbout : vacating altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zkc.artcc
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : multi engine pilot : instrument
Experience	flight time last 90 days : 116 flight time total : 14500 flight time type : 420
ASRS Report	463240
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : overshoot conflict : airborne critical non adherence : published procedure non adherence : clearance
Independent Detector	aircraft equipment : tcas
Supplementary
Problem Areas	ATC Human Performance Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

LR60 departed uin on feb/xa/00. After departure, was cleared to FL210. We acknowledged FL210 to center, then entered FL210 on the autoplt (copilot's side). Upon reaching FL210, autoplt did not capture altitude. At FL212, autoplt was disengaged to start descent back to FL210. Between FL212-213, while commencing descent, we received an egpws command of 'pull up, pull up' followed immediately by a TCASII warning command 'traffic, traffic.' descent was stopped by following egpws command at which time TCASII changed to red alert (RA category) and commanded 'climb, climb, climb.' we immediately followed the TCASII command and leveled off at FL226. After traffic had passed we immediately started descent back to FL210. Upon reaching FL220, center asked our altitude and I responded FL220. We were then cleared to expedite climb to FL240 which was promptly done.

Original NASA ASRS Text

Title: LR60 CREW OVERSHOT THEIR CLRED ALT AND GOT A TCASII RA WITH CONFLICTING TFC.

Narrative: LR60 DEPARTED UIN ON FEB/XA/00. AFTER DEP, WAS CLRED TO FL210. WE ACKNOWLEDGED FL210 TO CTR, THEN ENTERED FL210 ON THE AUTOPLT (COPLT'S SIDE). UPON REACHING FL210, AUTOPLT DID NOT CAPTURE ALT. AT FL212, AUTOPLT WAS DISENGAGED TO START DSCNT BACK TO FL210. BTWN FL212-213, WHILE COMMENCING DSCNT, WE RECEIVED AN EGPWS COMMAND OF 'PULL UP, PULL UP' FOLLOWED IMMEDIATELY BY A TCASII WARNING COMMAND 'TFC, TFC.' DSCNT WAS STOPPED BY FOLLOWING EGPWS COMMAND AT WHICH TIME TCASII CHANGED TO RED ALERT (RA CATEGORY) AND COMMANDED 'CLB, CLB, CLB.' WE IMMEDIATELY FOLLOWED THE TCASII COMMAND AND LEVELED OFF AT FL226. AFTER TFC HAD PASSED WE IMMEDIATELY STARTED DSCNT BACK TO FL210. UPON REACHING FL220, CTR ASKED OUR ALT AND I RESPONDED FL220. WE WERE THEN CLRED TO EXPEDITE CLB TO FL240 WHICH WAS PROMPTLY DONE.

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.