A G-4 first officer reports a potential conflict with traffic climbing through their altitude during their descent and maintenance diversion into iad while at 17000 ft near bwi, md.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	534123
Time
Date	200201
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : bal.vortac
State Reference	MD
Altitude	msl single value : 17000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : iad.tracon
Operator	general aviation : personal
Make Model Name	Gulfstream IV
Operating Under FAR Part	Part 91
Navigation In Use	other other vortac
Flight Phase	cruise : level
Aircraft 2
Controlling Facilities	tracon : iad.tracon
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 65 flight time total : 25000 flight time type : 700
ASRS Report	534123
Person 2
Affiliation	other
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical non adherence : required legal separation non adherence : published procedure
Independent Detector	aircraft equipment : tcas other controllera other flight crewa other flight crewb
Resolutory Action	controller : issued advisory flight crew : took evasive action
Miss Distance	horizontal : 10000
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance Aircraft
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

During climb phase of flight frp, teb tp ZZZ level at FL230, we experienced a reverse unlock light. We decided to divert to iad for the long runway and maintenance. ATC descended us to 17000 ft. While over bwi and inbound to iad, ATC called traffic at one O'clock and climbing through our altitude. His altitude at that time was 15800 ft as seen on TCAS ii and he was climbing. Both the PIC and sic had the traffic visually and noted that it was climbing and closing rapidly. We received a TA, RA and a TCAS ii climb. We executed an immediate right turn and climbed to 17400 ft. Traffic passed to our left and below. We returned to 17000 ft and continued on course to iad and reported the incident to iad approach control. Contributing factors: unknown.

Original NASA ASRS Text

Title: A G-4 FO RPTS A POTENTIAL CONFLICT WITH TFC CLIMBING THROUGH THEIR ALT DURING THEIR DESCENT AND MAINT DIVERSION INTO IAD WHILE AT 17000 FT NEAR BWI, MD.

Narrative: DURING CLIMB PHASE OF FLT FRP, TEB TP ZZZ LEVEL AT FL230, WE EXPERIENCED A REVERSE UNLOCK LIGHT. WE DECIDED TO DIVERT TO IAD FOR THE LONG RWY AND MAINT. ATC DESCENDED US TO 17000 FT. WHILE OVER BWI AND INBOUND TO IAD, ATC CALLED TFC AT ONE O'CLOCK AND CLIMBING THROUGH OUR ALTITUDE. HIS ALTITUDE AT THAT TIME WAS 15800 FT AS SEEN ON TCAS II AND HE WAS CLIMBING. BOTH THE PIC AND SIC HAD THE TFC VISUALLY AND NOTED THAT IT WAS CLIMBING AND CLOSING RAPIDLY. WE RECEIVED A TA, RA AND A TCAS II CLIMB. WE EXECUTED AN IMMEDIATE R TURN AND CLIMBED TO 17400 FT. TFC PASSED TO OUR L AND BELOW. WE RETURNED TO 17000 FT AND CONTINUED ON COURSE TO IAD AND RPTED THE INCIDENT TO IAD APCH CTL. CONTRIBUTING FACTORS: UNKNOWN.

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.