Climbing MD80 initiates a TCAS maneuver from a descending HS25, even through procedure separated by ...

Attributes
ACN	531634
Time
Date	200112
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	navaid : tvt.vortac
State Reference	OH
Altitude	msl single value : 28000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zid.artcc tower : fxe.tower
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zid.artcc
Operator	general aviation : corporate
Operating Under FAR Part	Part 91
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 20 controller time certified in position1 : 3
ASRS Report	531634
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	altitude deviation : excursion from assigned altitude altitude deviation : undershoot conflict : airborne less severe
Independent Detector	aircraft equipment : tcas other flight crewa
Resolutory Action	controller : issued advisory flight crew : returned to assigned altitude flight crew : took evasive action
Miss Distance	horizontal : 0 vertical : 1000
Supplementary
Problem Areas	ATC Human Performance Aircraft
Primary Problem	ATC Human Performance

Narrative:

MD80/right departure from pt, direct tvt, climbing to FL280. HS25, det arrival, descending to FL290. Paths of aircraft crossed 5 mi east of tvt VOR. MD80 was issued traffic descending to FL290 northbound. HS25 was issued the traffic climbing to FL280 wbound. MD80 was level 5 mi from crossing pointed traffic, when traffic crossed MD80 reported a TCAS RA and descended. Separation was never lost and traffic was issued to both aircraft. At the crossing point, the MD80 as level at FL280 and HS25 was leveling at FL290 when MD80 reported TCAS.

Original NASA ASRS Text

Title: CLBING MD80 INITIATES A TCAS MANEUVER FROM A DSNDING HS25, EVEN THROUGH PROC SEPARATED BY ZID.

Narrative: MD80/R DEP FROM PT, DIRECT TVT, CLBING TO FL280. HS25, DET ARR, DSNDING TO FL290. PATHS OF ACFT CROSSED 5 MI E OF TVT VOR. MD80 WAS ISSUED TFC DSNDING TO FL290 NBOUND. HS25 WAS ISSUED THE TFC CLBING TO FL280 WBOUND. MD80 WAS LEVEL 5 MI FROM CROSSING POINTED TFC, WHEN TFC CROSSED MD80 RPTED A TCAS RA AND DSNDED. SEPARATION WAS NEVER LOST AND TFC WAS ISSUED TO BOTH ACFT. AT THE CROSSING POINT, THE MD80 AS LEVEL AT FL280 AND HS25 WAS LEVELING AT FL290 WHEN MD80 RPTED TCAS.

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.

Climbing MD80 initiates a TCAS maneuver from a descending HS25, even through procedure separated by ZID.