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Air carrier's unexpected slow rate of climb creates a potential conflict and loss of separation for the ARTCC radar controller.
| Attributes | |
| ACN | 138509 |
| Time | |
| Date | 199003 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : lny |
| State Reference | HI |
| Altitude | msl bound lower : 13000 msl bound upper : 14000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhn |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other departure sid : sid enroute : pacific |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi pilot : flight engineer |
| Experience | flight time last 90 days : 200 flight time total : 9700 flight time type : 4000 |
| ASRS Report | 138509 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 6000 flight time type : 2000 |
| ASRS Report | 138392 |
| Events | |
| Anomaly | altitude deviation : undershoot conflict : airborne less severe non adherence : published procedure non adherence : required legal separation non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 800 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
En route ogg to hnl, first officer's flight director indicator and associated captain's course indicator flags appeared in climb. Trying to correct situation, inadvertently slowed rate of climb between 13000' and 14000'. Center called and alerted crew to slow climb rate, at which time climb was expedited to 14000'. There was opposite direction traffic at 13000'. However, there was 1000' separation by the time the 2 aircraft reached the same location. Suggestions: reconsider (ZHN) routing maui arrival traffic from honolulu away from lny where the conflict occurred. This has become an extremely hazardous traffic area since routings were changed in 1989. Most traffic east of honolulu is now routed near lny and the potential for conflict is extremely great.
Original NASA ASRS Text
Title: ACR'S UNEXPECTED SLOW RATE OF CLIMB CREATES A POTENTIAL CONFLICT AND LOSS OF SEPARATION FOR THE ARTCC RADAR CTLR.
Narrative: ENRTE OGG TO HNL, F/O'S FLT DIRECTOR INDICATOR AND ASSOCIATED CAPT'S COURSE INDICATOR FLAGS APPEARED IN CLIMB. TRYING TO CORRECT SITUATION, INADVERTENTLY SLOWED RATE OF CLIMB BETWEEN 13000' AND 14000'. CENTER CALLED AND ALERTED CREW TO SLOW CLIMB RATE, AT WHICH TIME CLIMB WAS EXPEDITED TO 14000'. THERE WAS OPPOSITE DIRECTION TFC AT 13000'. HOWEVER, THERE WAS 1000' SEPARATION BY THE TIME THE 2 ACFT REACHED THE SAME LOCATION. SUGGESTIONS: RECONSIDER (ZHN) ROUTING MAUI ARR TFC FROM HONOLULU AWAY FROM LNY WHERE THE CONFLICT OCCURRED. THIS HAS BECOME AN EXTREMELY HAZARDOUS TFC AREA SINCE ROUTINGS WERE CHANGED IN 1989. MOST TFC E OF HONOLULU IS NOW ROUTED NEAR LNY AND THE POTENTIAL FOR CONFLICT IS EXTREMELY GREAT.
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.