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The flight crew of a climbing departing B737-700 fails to intercept A90 during radar vectoring from ZNY, ny.
| Attributes | |
| ACN | 504540 |
| Time | |
| Date | 200103 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : zny.artcc |
| State Reference | NY |
| Altitude | msl bound lower : 22000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : vacating altitude |
| Route In Use | departure : on vectors enroute airway : j95.airway |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 170 flight time total : 15400 flight time type : 2650 |
| ASRS Report | 504540 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance controller : issued advisory flight crew : returned to intended or assigned course |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During climb out from ewr airport we were instructed to climb out on a heading of 300 degrees to an altitude of 10000 ft by departure. Next we were instructed by center to climb to FL220 on a heading of 360 degrees and intercept J95 between gayel and stomp intxns. At this time I observed the captain, who was the PF, enter the necessary elements to allow the autoplt to join the airway. Both LNAV and VNAV were engaged and illuminated. Our next instruction was to intercept on a heading of 340 degrees. I acknowledged ZNY. At this time I did not remember if the LNAV button was still illuminated. Several mins later, I received a clearance from ZNY to climb and maintain FL350. I responded and right after that the controller asked if we were in a left turn. Apparently, the LNAV had become disengaged. We then were instructed to turn left and rejoin the airway. I believe that for some reason LNAV disconnected and was not observed with the second heading change. At the time I was checking the future route and not following the aircraft progress on a short range scale. For that reason I will no longer leave the closer range setting until a more stable environment has been established.
Original NASA ASRS Text
Title: THE FLC OF A CLBING DEPARTING B737-700 FAILS TO INTERCEPT A90 DURING RADAR VECTORING FROM ZNY, NY.
Narrative: DURING CLBOUT FROM EWR ARPT WE WERE INSTRUCTED TO CLB OUT ON A HDG OF 300 DEGS TO AN ALT OF 10000 FT BY DEP. NEXT WE WERE INSTRUCTED BY CTR TO CLB TO FL220 ON A HDG OF 360 DEGS AND INTERCEPT J95 BTWN GAYEL AND STOMP INTXNS. AT THIS TIME I OBSERVED THE CAPT, WHO WAS THE PF, ENTER THE NECESSARY ELEMENTS TO ALLOW THE AUTOPLT TO JOIN THE AIRWAY. BOTH LNAV AND VNAV WERE ENGAGED AND ILLUMINATED. OUR NEXT INSTRUCTION WAS TO INTERCEPT ON A HDG OF 340 DEGS. I ACKNOWLEDGED ZNY. AT THIS TIME I DID NOT REMEMBER IF THE LNAV BUTTON WAS STILL ILLUMINATED. SEVERAL MINS LATER, I RECEIVED A CLRNC FROM ZNY TO CLB AND MAINTAIN FL350. I RESPONDED AND RIGHT AFTER THAT THE CTLR ASKED IF WE WERE IN A L TURN. APPARENTLY, THE LNAV HAD BECOME DISENGAGED. WE THEN WERE INSTRUCTED TO TURN L AND REJOIN THE AIRWAY. I BELIEVE THAT FOR SOME REASON LNAV DISCONNECTED AND WAS NOT OBSERVED WITH THE SECOND HDG CHANGE. AT THE TIME I WAS CHKING THE FUTURE RTE AND NOT FOLLOWING THE ACFT PROGRESS ON A SHORT RANGE SCALE. FOR THAT REASON I WILL NO LONGER LEAVE THE CLOSER RANGE SETTING UNTIL A MORE STABLE ENVIRONMENT HAS BEEN ESTABLISHED.
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.