Air carrier X TCASII RA with air carrier Y. Air carrier X non adherence to ATC clearance unauthorized climb from assigned altitude through occupied altitude air carrier Z. Pilot deviation.

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Attributes
ACN	245982
Time
Date	199307
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : den
State Reference	CO
Altitude	msl bound lower : 24000 msl bound upper : 25700
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdv
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	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 5
ASRS Report	245982
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 33000 vertical : 700
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Air carrier X at FL240 responded to a TCASII RA from air carrier Y at FL230 (also TCASII equipped but received no RA) and climbed to FL257 without advising ATC. 5.5 mi in trail of air carrier X was air carrier Z at FL250 on a converging heading. Both aircraft were deviating for WX. Air carrier Z had to be turned 90 degrees to ensure separation, forcing him into the path of a solid stream of departures climbing out of denver. The result was 15 mins of a nearly unmanageable sector, and the near loss of standard separation.

Original NASA ASRS Text

Title: ACR X TCASII RA WITH ACR Y. ACR X NON ADHERENCE TO ATC CLRNC UNAUTH CLB FROM ASSIGNED ALT THROUGH OCCUPIED ALT ACR Z. PLTDEV.

Narrative: ACR X AT FL240 RESPONDED TO A TCASII RA FROM ACR Y AT FL230 (ALSO TCASII EQUIPPED BUT RECEIVED NO RA) AND CLBED TO FL257 WITHOUT ADVISING ATC. 5.5 MI IN TRAIL OF ACR X WAS ACR Z AT FL250 ON A CONVERGING HDG. BOTH ACFT WERE DEVIATING FOR WX. ACR Z HAD TO BE TURNED 90 DEGS TO ENSURE SEPARATION, FORCING HIM INTO THE PATH OF A SOLID STREAM OF DEPS CLBING OUT OF DENVER. THE RESULT WAS 15 MINS OF A NEARLY UNMANAGEABLE SECTOR, AND THE NEAR LOSS OF STANDARD SEPARATION.

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.