Altitude deviation altitude excursion during evasive action climb.

Attributes
ACN	221518
Time
Date	199209
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : okk
State Reference	IN
Altitude	msl bound lower : 22000 msl bound upper : 22450
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau tower : sat
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
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
Experience	flight time last 90 days : 200 flight time total : 10200 flight time type : 800
ASRS Report	221518
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time total : 14000 flight time type : 3000
ASRS Report	221937
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 6000 vertical : 1800
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation other

Narrative:

About over okk VOR we were at FL220 and a target appeared at about 10 O'clock. His altitude showed -27 climbing and a TA occurred. At -24 climbing an RA occurred. Autoplt was disconnected and a climb was started to comply with RA. Climb was stopped when 'clear of conflict' was heard and 'behind' showed on TCASII screen. Maximum altitude achieved was 22450 ft. Returned to FL220. We had just switched from ZID to ZAU. Traffic was not called out to us by either center. ZAU said to us (after we reported RA and subsequent altitude deviation) that the traffic was climbing to FL210. Supplemental information from acn 221937: the intruder was apparently climbing rapidly up to FL210 in our 10:30 position. ATC did not report this traffic to us and were IMC.

Original NASA ASRS Text

Title: ALTDEV ALT EXCURSION DURING EVASIVE ACTION CLB.

Narrative: ABOUT OVER OKK VOR WE WERE AT FL220 AND A TARGET APPEARED AT ABOUT 10 O'CLOCK. HIS ALT SHOWED -27 CLBING AND A TA OCCURRED. AT -24 CLBING AN RA OCCURRED. AUTOPLT WAS DISCONNECTED AND A CLB WAS STARTED TO COMPLY WITH RA. CLB WAS STOPPED WHEN 'CLR OF CONFLICT' WAS HEARD AND 'BEHIND' SHOWED ON TCASII SCREEN. MAX ALT ACHIEVED WAS 22450 FT. RETURNED TO FL220. WE HAD JUST SWITCHED FROM ZID TO ZAU. TFC WAS NOT CALLED OUT TO US BY EITHER CTR. ZAU SAID TO US (AFTER WE RPTED RA AND SUBSEQUENT ALTDEV) THAT THE TFC WAS CLBING TO FL210. SUPPLEMENTAL INFO FROM ACN 221937: THE INTRUDER WAS APPARENTLY CLBING RAPIDLY UP TO FL210 IN OUR 10:30 POS. ATC DID NOT RPT THIS TFC TO US AND WERE IMC.

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.