An air carrier medium large transport climbed in response to a TCASII command.

Attributes
ACN	223514
Time
Date	199210
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : ewm
State Reference	TX
Altitude	msl bound lower : 29000 msl bound upper : 29600
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zab
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
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 : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 100 flight time total : 14000 flight time type : 1300
ASRS Report	223514
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : overshoot altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 15000 vertical : 600
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

Aircraft flying FL290 eastbound, 6 NM, 1 O'clock position. Received TCASII TA, 1400 ft at 3 NM. TCASII RA to 'climb now.' intruder was 1 O'clock, -600 ft. I advised ATC of RA. Some confusion with ATC reference RA. I explained again clearance deviation was 600 ft. Callback conversation with reporter revealed the following: the reporting pilot states that there was another aircraft out there, an medium large transport air carrier. The intruder was not seen visually as the reporter was in IMC. ATC did not call out the intruder aircraft as it was to stop at FL280. The intruder climbed through its altitude, then lied about it when queried by ATC.

Original NASA ASRS Text

Title: AN ACR MLG CLBED IN RESPONSE TO A TCASII COMMAND.

Narrative: ACFT FLYING FL290 EBOUND, 6 NM, 1 O'CLOCK POS. RECEIVED TCASII TA, 1400 FT AT 3 NM. TCASII RA TO 'CLB NOW.' INTRUDER WAS 1 O'CLOCK, -600 FT. I ADVISED ATC OF RA. SOME CONFUSION WITH ATC REF RA. I EXPLAINED AGAIN CLRNC DEV WAS 600 FT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: THE RPTING PLT STATES THAT THERE WAS ANOTHER ACFT OUT THERE, AN MLG ACR. THE INTRUDER WAS NOT SEEN VISUALLY AS THE RPTR WAS IN IMC. ATC DID NOT CALL OUT THE INTRUDER ACFT AS IT WAS TO STOP AT FL280. THE INTRUDER CLBED THROUGH ITS ALT, THEN LIED ABOUT IT WHEN QUERIED BY ATC.

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.