Reported near midair collision less than standard separation when reporter's aircraft conflicts with other traffic below it during descent from 6000 ft. Flight crew made an evasive action climb after receiving a TCASII RA. Controller did not respond when questioned by the reporter about the traffic. On departure, the supervisor admitted to knowing about the traffic conflict on the previous flight. Supervisor did not intervene due to controller training and wanted to know if they (flight crew) were going to report this.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	366105
Time
Date	199704
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lyh
State Reference	VA
Altitude	msl bound lower : 5700 msl bound upper : 5700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 135
Flight Phase	descent other
Route In Use	arrival other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 270 flight time total : 12000 flight time type : 270
ASRS Report	366105
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : nmac non adherence : published procedure non adherence : required legal separation other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 500 vertical : 200
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error
Situations
ATC Facility	procedure or policy : unspecified

Narrative:

During descent from cruise into lyh airport, ZDC 127.92 requested we slow as much as possible as we were #2 for the airport. At the same time we were instructed to descend to 5000 ft MSL. Controller called traffic to follow 12 O'clock and 15 mi. We were unable to see this traffic due to distance and a cloud deck below us. As we descended to the top of the cloud deck TCASII alerted us to traffic (we were passing 6000 ft MSL). The display did not resolve the traffic until we were within 200 ft of the traffic. We climbed back up to 6000 ft until TCASII showed 1 1/2 mi separation. Then resumed descent to 5000 ft MSL. When queried about the conflicting target ATC admitted only to the traffic 12 O'clock and now 11 mi. Descent and approach to landing continued uneventfully. When we departed lyh to return to clt, a new voice was on 127.92 claiming to be a supervisor and asked if we were the crew on the previous flight. We said yes and he admitted to knowing about the traffic conflict on the previous flight and did not intervene because of controller training and wanted to know if we were going to report this.

Original NASA ASRS Text

Title: RPTED NMAC LTSS WHEN RPTR'S ACFT CONFLICTS WITH OTHER TFC BELOW IT DURING DSCNT FROM 6000 FT. FLC MADE AN EVASIVE ACTION CLB AFTER RECEIVING A TCASII RA. CTLR DID NOT RESPOND WHEN QUESTIONED BY THE RPTR ABOUT THE TFC. ON DEP, THE SUPVR ADMITTED TO KNOWING ABOUT THE TFC CONFLICT ON THE PREVIOUS FLT. SUPVR DID NOT INTERVENE DUE TO CTLR TRAINING AND WANTED TO KNOW IF THEY (FLC) WERE GOING TO RPT THIS.

Narrative: DURING DSCNT FROM CRUISE INTO LYH ARPT, ZDC 127.92 REQUESTED WE SLOW AS MUCH AS POSSIBLE AS WE WERE #2 FOR THE ARPT. AT THE SAME TIME WE WERE INSTRUCTED TO DSND TO 5000 FT MSL. CTLR CALLED TFC TO FOLLOW 12 O'CLOCK AND 15 MI. WE WERE UNABLE TO SEE THIS TFC DUE TO DISTANCE AND A CLOUD DECK BELOW US. AS WE DSNDED TO THE TOP OF THE CLOUD DECK TCASII ALERTED US TO TFC (WE WERE PASSING 6000 FT MSL). THE DISPLAY DID NOT RESOLVE THE TFC UNTIL WE WERE WITHIN 200 FT OF THE TFC. WE CLBED BACK UP TO 6000 FT UNTIL TCASII SHOWED 1 1/2 MI SEPARATION. THEN RESUMED DSCNT TO 5000 FT MSL. WHEN QUERIED ABOUT THE CONFLICTING TARGET ATC ADMITTED ONLY TO THE TFC 12 O'CLOCK AND NOW 11 MI. DSCNT AND APCH TO LNDG CONTINUED UNEVENTFULLY. WHEN WE DEPARTED LYH TO RETURN TO CLT, A NEW VOICE WAS ON 127.92 CLAIMING TO BE A SUPVR AND ASKED IF WE WERE THE CREW ON THE PREVIOUS FLT. WE SAID YES AND HE ADMITTED TO KNOWING ABOUT THE TFC CONFLICT ON THE PREVIOUS FLT AND DID NOT INTERVENE BECAUSE OF CTLR TRAINING AND WANTED TO KNOW IF WE WERE GOING TO RPT THIS.

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.