Air carrier X TCASII RA climb from HS25 with standard vertical separation.

Attributes
ACN	261160
Time
Date	199401
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : tcc
State Reference	NM
Altitude	msl bound lower : 29000 msl bound upper : 29000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zab tower : sdf
Operator	common carrier : air carrier
Make Model Name	DC-9 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	HS 125 Series 1-600
Operating Under FAR Part	Part 91
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 military : 4 controller radar : 5
ASRS Report	261160
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 non adherence : clearance
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 : 12000 vertical : 1000
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

A dc-9 eastbound at FL290 asked if there was converging traffic. The answer was only the aircraft 10 O'clock and 2 mi at FL280, a wbound HS25. The dc-9 reported that aircraft on TCASII was at FL285. I, the controller, asked HS25 to verify at FL280 and altimeter 29.92 set. He, the HS25, said affirmative. The dc-9 advised he climbed 500 ft answering an RA. Both aircraft were at FL280 and FL290 standard separation. There was never a loss of required separation or was there a deviation of the FL280 traffic's altitude.

Original NASA ASRS Text

Title: ACR X TCASII RA CLB FROM HS25 WITH STANDARD VERT SEPARATION.

Narrative: A DC-9 EBOUND AT FL290 ASKED IF THERE WAS CONVERGING TFC. THE ANSWER WAS ONLY THE ACFT 10 O'CLOCK AND 2 MI AT FL280, A WBOUND HS25. THE DC-9 RPTED THAT ACFT ON TCASII WAS AT FL285. I, THE CTLR, ASKED HS25 TO VERIFY AT FL280 AND ALTIMETER 29.92 SET. HE, THE HS25, SAID AFFIRMATIVE. THE DC-9 ADVISED HE CLBED 500 FT ANSWERING AN RA. BOTH ACFT WERE AT FL280 AND FL290 STANDARD SEPARATION. THERE WAS NEVER A LOSS OF REQUIRED SEPARATION OR WAS THERE A DEV OF THE FL280 TFC'S ALT.

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.