Air carrier medium large transport altitude deviation overshot during climb.

Attributes
ACN	95041
Time
Date	198809
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ind
State Reference	IN
Altitude	msl bound lower : 20000 msl bound upper : 22000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute : direct enroute : on vectors enroute airway : v50
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 125 flight time total : 13000
ASRS Report	95041
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	altitude deviation : overshoot
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance
Consequence	Other
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	other

Narrative:

Flight dch en route from day to cmi climbing to FL220 (assigned), selected in altitude window and read back climb clearance to FL220. Passing 20500' ZID turned us 90 degrees off course (right turn to 360 degrees) and maintain present altitude (FL210). ZID said he had cleared us to FL200 and that we had acknowledged the clearance with a 'roger.' we had not acknowledged such a clearance, although another air carrier on the frequency had acknowledged a clearance to slow to FL250 and maintain FL200 with a 'roger.' a few mins later we were cleared via a left turn to heading 270 degrees, direct ind when able, climb and maintain FL220, which we read back and complied with. The controller then handed off company flight dcf to frequency 132.2, moments later after no response from dcf. He repeated the clearance for company flight dch to switch to frequency 132.2, we acknowledged and switched frequency. The controller seemed rather confused with the aircraft positions and flight numbers under his control. During this event we noticed no conflicting traffic of any description.

Original NASA ASRS Text

Title: ACR MLG ALT DEVIATION OVERSHOT DURING CLIMB.

Narrative: FLT DCH ENRTE FROM DAY TO CMI CLBING TO FL220 (ASSIGNED), SELECTED IN ALT WINDOW AND READ BACK CLB CLRNC TO FL220. PASSING 20500' ZID TURNED US 90 DEGS OFF COURSE (RIGHT TURN TO 360 DEGS) AND MAINTAIN PRESENT ALT (FL210). ZID SAID HE HAD CLRED US TO FL200 AND THAT WE HAD ACKNOWLEDGED THE CLRNC WITH A 'ROGER.' WE HAD NOT ACKNOWLEDGED SUCH A CLRNC, ALTHOUGH ANOTHER ACR ON THE FREQ HAD ACKNOWLEDGED A CLRNC TO SLOW TO FL250 AND MAINTAIN FL200 WITH A 'ROGER.' A FEW MINS LATER WE WERE CLRED VIA A LEFT TURN TO HDG 270 DEGS, DIRECT IND WHEN ABLE, CLB AND MAINTAIN FL220, WHICH WE READ BACK AND COMPLIED WITH. THE CTLR THEN HANDED OFF COMPANY FLT DCF TO FREQ 132.2, MOMENTS LATER AFTER NO RESPONSE FROM DCF. HE REPEATED THE CLRNC FOR COMPANY FLT DCH TO SWITCH TO FREQ 132.2, WE ACKNOWLEDGED AND SWITCHED FREQ. THE CTLR SEEMED RATHER CONFUSED WITH THE ACFT POSITIONS AND FLT NUMBERS UNDER HIS CTL. DURING THIS EVENT WE NOTICED NO CONFLICTING TFC OF ANY DESCRIPTION.

Data retrieved from NASA's ASRS site as of August 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.