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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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An air carrier medium large transport flight crew climbs above their assigned altitude while in a steep bank and comes within 500 ft of another aircraft's altitude.
| Attributes | |
| ACN | 346980 |
| Time | |
| Date | 199609 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : dxo airport : dtw |
| State Reference | MI |
| Altitude | msl bound lower : 10000 msl bound upper : 10500 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : dtw |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 6000 flight time type : 600 |
| ASRS Report | 346980 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : far non adherence : clearance |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Miss Distance | horizontal : 24000 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We had just departed dtw for syr. The captain was the PF. The WX was VMC with isolated level 1 rainshowers. Dtw departure gave us a heading of 060 degrees. The captain spotted a small buildup dimly visible in the low light as he was turning. To speed up the turn, so as to miss the cloud, he disconnected the autoplt and rolled to a 35-40 degree bank to the left. A split second later, the ivsi was showing a 2000 FPM climb. I called out the altitude deviation, which took the captain another split second to absorb. By the time we started down we were at 10500 ft. Our TCASII was reporting traffic at 3 O'clock, 500 ft above us. This deviation was influenced by fatigue (our last leg of a 10 hour, 5 leg day), which led to a poor decision to disconnect the autoplt, compounded by a poor scan of the instruments by the PF. The sudden bank rate caused me to fixate on the artificial horizon (I was thinking vortices, or autoplt malfunction) so I lost my scan momentarily also.
Original NASA ASRS Text
Title: AN ACR MLG FLC CLBS ABOVE THEIR ASSIGNED ALT WHILE IN A STEEP BANK AND COMES WITHIN 500 FT OF ANOTHER ACFT'S ALT.
Narrative: WE HAD JUST DEPARTED DTW FOR SYR. THE CAPT WAS THE PF. THE WX WAS VMC WITH ISOLATED LEVEL 1 RAINSHOWERS. DTW DEP GAVE US A HDG OF 060 DEGS. THE CAPT SPOTTED A SMALL BUILDUP DIMLY VISIBLE IN THE LOW LIGHT AS HE WAS TURNING. TO SPEED UP THE TURN, SO AS TO MISS THE CLOUD, HE DISCONNECTED THE AUTOPLT AND ROLLED TO A 35-40 DEG BANK TO THE L. A SPLIT SECOND LATER, THE IVSI WAS SHOWING A 2000 FPM CLB. I CALLED OUT THE ALT DEV, WHICH TOOK THE CAPT ANOTHER SPLIT SECOND TO ABSORB. BY THE TIME WE STARTED DOWN WE WERE AT 10500 FT. OUR TCASII WAS RPTING TFC AT 3 O'CLOCK, 500 FT ABOVE US. THIS DEV WAS INFLUENCED BY FATIGUE (OUR LAST LEG OF A 10 HR, 5 LEG DAY), WHICH LED TO A POOR DECISION TO DISCONNECT THE AUTOPLT, COMPOUNDED BY A POOR SCAN OF THE INSTS BY THE PF. THE SUDDEN BANK RATE CAUSED ME TO FIXATE ON THE ARTIFICIAL HORIZON (I WAS THINKING VORTICES, OR AUTOPLT MALFUNCTION) SO I LOST MY SCAN MOMENTARILY ALSO.
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.