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During climb, light transport did not reach his assigned altitude in time to prevent loss of separation with opposite direction traffic.
| Attributes | |
| ACN | 111772 |
| Time | |
| Date | 198905 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : orf |
| State Reference | VA |
| Altitude | msl bound lower : 31000 msl bound upper : 32500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | general aviation : corporate |
| Make Model Name | Light Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 111772 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : undershoot conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Miss Distance | horizontal : 27600 vertical : 1500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Light transport northbound climbing to FL270, requesting higher. I climbed aircraft to FL290 (opp direction traffic at FL310). Aircraft quickly leveled at FL290. As soon as aircraft passed southbound traffic, I gave clearance for light transport to climb to FL330. An air carrier was southbound about 80 mi opp direction. Based on climb performance that I had observed I felt that there was no problem. I monitored situation and realized light transport had slowed in climb.I turned HJ25 30 degrees left which, at the time. I felt was sufficient to clear air carrier southbound at FL310. When it became evident that sep was still debatable, I turned air carrier 30 degrees left. With 10 mi and 60 degrees divergence, I felt no other action was necessary. However, the aircraft passed with 4.6 mi and 1500'. Factors include: a) jet stream from northwest possibly affected the turn for light transport. B) I have my doubts as to whether the air carrier actually turned. The pilot acknowledged for turn, but ntap does not show any discernable change in heading. C) another aircraft called on frequency that I had no handoff on. I idented the aircraft as an aircraft entering my airspace west/O a handoff from adjacent sector. This diverted my attention. D) I have chronically inflamed shoulder and arm muscle, which has been identified as the result of overworking the left thumb when keying the microphone ('controller's shoulder?'). This resulted in me not being at my peak physical condition. The nagging pain caused some distraction. East) temperature had increased dramatically in the last 2 days. Aircraft climb performance changed dramatically. Although I was aware of this, I was used to better climb performance.
Original NASA ASRS Text
Title: DURING CLIMB, LTT DID NOT REACH HIS ASSIGNED ALT IN TIME TO PREVENT LOSS OF SEPARATION WITH OPPOSITE DIRECTION TRAFFIC.
Narrative: LTT NBOUND CLBING TO FL270, REQUESTING HIGHER. I CLBED ACFT TO FL290 (OPP DIRECTION TFC AT FL310). ACFT QUICKLY LEVELED AT FL290. AS SOON AS ACFT PASSED SBND TFC, I GAVE CLRNC FOR LTT TO CLB TO FL330. AN ACR WAS SBND ABOUT 80 MI OPP DIRECTION. BASED ON CLB PERFORMANCE THAT I HAD OBSERVED I FELT THAT THERE WAS NO PROB. I MONITORED SITUATION AND REALIZED LTT HAD SLOWED IN CLB.I TURNED HJ25 30 DEGS LEFT WHICH, AT THE TIME. I FELT WAS SUFFICIENT TO CLR ACR SBND AT FL310. WHEN IT BECAME EVIDENT THAT SEP WAS STILL DEBATABLE, I TURNED ACR 30 DEGS LEFT. WITH 10 MI AND 60 DEGS DIVERGENCE, I FELT NO OTHER ACTION WAS NECESSARY. HOWEVER, THE ACFT PASSED WITH 4.6 MI AND 1500'. FACTORS INCLUDE: A) JET STREAM FROM NW POSSIBLY AFFECTED THE TURN FOR LTT. B) I HAVE MY DOUBTS AS TO WHETHER THE ACR ACTUALLY TURNED. THE PLT ACKNOWLEDGED FOR TURN, BUT NTAP DOES NOT SHOW ANY DISCERNABLE CHANGE IN HDG. C) ANOTHER ACFT CALLED ON FREQ THAT I HAD NO HDOF ON. I IDENTED THE ACFT AS AN ACFT ENTERING MY AIRSPACE W/O A HDOF FROM ADJACENT SECTOR. THIS DIVERTED MY ATTN. D) I HAVE CHRONICALLY INFLAMED SHOULDER AND ARM MUSCLE, WHICH HAS BEEN IDENTIFIED AS THE RESULT OF OVERWORKING THE LEFT THUMB WHEN KEYING THE MIC ('CTLR'S SHOULDER?'). THIS RESULTED IN ME NOT BEING AT MY PEAK PHYSICAL CONDITION. THE NAGGING PAIN CAUSED SOME DISTR. E) TEMP HAD INCREASED DRAMATICALLY IN THE LAST 2 DAYS. ACFT CLB PERFORMANCE CHANGED DRAMATICALLY. ALTHOUGH I WAS AWARE OF THIS, I WAS USED TO BETTER CLB PERFORMANCE.
Data retrieved from NASA's ASRS site as of August 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.