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The captain of a DC10-30 overshot assigned altitude during departure climb resulting in a TCASII RA and ATC requesting his altitude. The captain became distraction with a disagreement between the 2 navigation receivers, which affected the 2 flight directors, and forgot to arm the autoplt altitude capture.
| Attributes | |
| ACN | 415330 |
| Time | |
| Date | 199809 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ebur airport : bru |
| State Reference | FO |
| Altitude | msl bound lower : 17000 msl bound upper : 17500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 30 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct enroute airway : ebru |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : cfi pilot : flight engineer |
| Experience | flight time last 90 days : 150 flight time total : 700 flight time type : 250 |
| ASRS Report | 415330 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 120 flight time total : 5000 flight time type : 2000 |
| ASRS Report | 415123 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : overshoot conflict : airborne less severe non adherence : clearance other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Miss Distance | horizontal : 12000 vertical : 700 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We departed from ebru (brussels, belgium) without a problem. Upon passing 10000 ft, I called in times to handling and obtained a SELCAL. Just as I finished getting SELCAL the, the TCASII gave a TA, then shortly after, an RA. The captain promptly disengaged the autoplt and began to descend to comply with the RA. By the time I turned my seat around to look for traffic we were leveling at 17000 ft and the TCASII said 'traffic no factor.' what I believe had happened, was the autoplt failed to capture and, being at a fairly light weight, climbed through our assigned altitude of 17000 ft. The captain caught the problem and began the correction and spotted the traffic crossing on a non collision course to our right side passing in back of us. Supplemental information from acn 415123: the altitude arm feature of the FMS had become unarmed (upon analysis after the incident) and I allowed the aircraft to climb to 17300 ft prior to disengaging the autoplt and descending back to 17000 ft. The error on my part resulted in an ultimate altitude deviation of 500 ft (17500 ft by the time I had disconnected the autoplt and descended the aircraft).
Original NASA ASRS Text
Title: THE CAPT OF A DC10-30 OVERSHOT ASSIGNED ALT DURING DEP CLB RESULTING IN A TCASII RA AND ATC REQUESTING HIS ALT. THE CAPT BECAME DISTR WITH A DISAGREEMENT BTWN THE 2 NAV RECEIVERS, WHICH AFFECTED THE 2 FLT DIRECTORS, AND FORGOT TO ARM THE AUTOPLT ALT CAPTURE.
Narrative: WE DEPARTED FROM EBRU (BRUSSELS, BELGIUM) WITHOUT A PROB. UPON PASSING 10000 FT, I CALLED IN TIMES TO HANDLING AND OBTAINED A SELCAL. JUST AS I FINISHED GETTING SELCAL THE, THE TCASII GAVE A TA, THEN SHORTLY AFTER, AN RA. THE CAPT PROMPTLY DISENGAGED THE AUTOPLT AND BEGAN TO DSND TO COMPLY WITH THE RA. BY THE TIME I TURNED MY SEAT AROUND TO LOOK FOR TFC WE WERE LEVELING AT 17000 FT AND THE TCASII SAID 'TFC NO FACTOR.' WHAT I BELIEVE HAD HAPPENED, WAS THE AUTOPLT FAILED TO CAPTURE AND, BEING AT A FAIRLY LIGHT WT, CLBED THROUGH OUR ASSIGNED ALT OF 17000 FT. THE CAPT CAUGHT THE PROB AND BEGAN THE CORRECTION AND SPOTTED THE TFC XING ON A NON COLLISION COURSE TO OUR R SIDE PASSING IN BACK OF US. SUPPLEMENTAL INFO FROM ACN 415123: THE ALT ARM FEATURE OF THE FMS HAD BECOME UNARMED (UPON ANALYSIS AFTER THE INCIDENT) AND I ALLOWED THE ACFT TO CLB TO 17300 FT PRIOR TO DISENGAGING THE AUTOPLT AND DSNDING BACK TO 17000 FT. THE ERROR ON MY PART RESULTED IN AN ULTIMATE ALTDEV OF 500 FT (17500 FT BY THE TIME I HAD DISCONNECTED THE AUTOPLT AND DSNDED THE ACFT).
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.