Altitude deviation altitude excursion in air carrier's flight crew response to TCASII RA.

Attributes
ACN	303039
Time
Date	199504
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : srq
State Reference	FL
Altitude	msl bound lower : 27000 msl bound upper : 27800
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zjx tower : msn
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Military
Operating Under FAR Part	other : other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 6000 flight time type : 3000
ASRS Report	303039
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	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 other
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 0 vertical : 1000
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were level at FL270 sebound. Other aircraft was nwbound climbing. At about our 11 O'clock position TCASII said 'traffic, traffic.' aircraft showed 1400 ft below climbing fast. At 12 O'clock 3 mi TCASII said 'climb, climb.' aircraft showed 1000 ft below climbing. First officer took aircraft off autoplt and climbed to about FL278. ATC was advised. I believe the rapid rate of climb and a slight overshoot by the military aircraft caused the RA. I never saw less than 1000 ft vertical separation on display.

Original NASA ASRS Text

Title: ALTDEV ALT EXCURSION IN ACR'S FLC RESPONSE TO TCASII RA.

Narrative: WE WERE LEVEL AT FL270 SEBOUND. OTHER ACFT WAS NWBOUND CLBING. AT ABOUT OUR 11 O'CLOCK POS TCASII SAID 'TFC, TFC.' ACFT SHOWED 1400 FT BELOW CLBING FAST. AT 12 O'CLOCK 3 MI TCASII SAID 'CLB, CLB.' ACFT SHOWED 1000 FT BELOW CLBING. FO TOOK ACFT OFF AUTOPLT AND CLBED TO ABOUT FL278. ATC WAS ADVISED. I BELIEVE THE RAPID RATE OF CLB AND A SLIGHT OVERSHOOT BY THE MIL ACFT CAUSED THE RA. I NEVER SAW LESS THAN 1000 FT VERT SEPARATION ON DISPLAY.

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.