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Falcon 50EX flight crew has an altitude deviation resulting in loss of separation during departure from ipt.
| Attributes | |
| ACN | 703037 |
| Time | |
| Date | 200607 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : ipt.airport |
| State Reference | PA |
| Altitude | msl single value : 6000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Turbulence |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny.artcc tower : iad.tower |
| Operator | general aviation : corporate |
| Make Model Name | Falcon 50 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : enroute altitude change cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zny.artcc |
| Make Model Name | PA-28 Cherokee/Archer II/Dakota/Pillan/Warrior |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 45 flight time total : 15200 flight time type : 3500 |
| ASRS Report | 703037 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 14000 flight time type : 5000 |
| ASRS Report | 703156 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance |
| Independent Detector | atc equipment : conflict alert other controllera other flight crewa other flight crewb |
| Resolutory Action | flight crew : returned to assigned altitude |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Weather Flight Crew Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Loss of aircraft separation occurred due to convective turbulence causing momentary altitude deviation of 150-200 ft from the assigned altitude of 6000 ft MSL. Other aircraft was at an assigned altitude of 7000 ft MSL. The PF was hand flying the aircraft; the autoplt was not engaged. The altitude capture function of the altitude preselect feature was not functioning correctly. It was noticed on the previous leg; and was intermittently inoperative. Crew corrected to 6000 ft immediately; and the rest of the flight was uneventful. Crew was notified on the loss of separation after landing at frg airport. Supplemental information from acn 703156: we did observe a slight deviation above 6000 ft as our altitude select did not capture at exactly 6000 ft. I do remember making the observation to my first officer that the altitude hold did not engage at 6000 ft. This happened at the end of a 13 hour duty day in cumulus clouds in an area of convective activity.
Original NASA ASRS Text
Title: FALCON 50EX FLT CREW HAS AN ALTDEV RESULTING IN LOSS OF SEPARATION DURING DEP FROM IPT.
Narrative: LOSS OF ACFT SEPARATION OCCURRED DUE TO CONVECTIVE TURB CAUSING MOMENTARY ALTDEV OF 150-200 FT FROM THE ASSIGNED ALT OF 6000 FT MSL. OTHER ACFT WAS AT AN ASSIGNED ALT OF 7000 FT MSL. THE PF WAS HAND FLYING THE ACFT; THE AUTOPLT WAS NOT ENGAGED. THE ALT CAPTURE FUNCTION OF THE ALT PRESELECT FEATURE WAS NOT FUNCTIONING CORRECTLY. IT WAS NOTICED ON THE PREVIOUS LEG; AND WAS INTERMITTENTLY INOP. CREW CORRECTED TO 6000 FT IMMEDIATELY; AND THE REST OF THE FLT WAS UNEVENTFUL. CREW WAS NOTIFIED ON THE LOSS OF SEPARATION AFTER LNDG AT FRG ARPT. SUPPLEMENTAL INFO FROM ACN 703156: WE DID OBSERVE A SLIGHT DEV ABOVE 6000 FT AS OUR ALT SELECT DID NOT CAPTURE AT EXACTLY 6000 FT. I DO REMEMBER MAKING THE OBSERVATION TO MY FO THAT THE ALT HOLD DID NOT ENGAGE AT 6000 FT. THIS HAPPENED AT THE END OF A 13 HR DUTY DAY IN CUMULUS CLOUDS IN AN AREA OF CONVECTIVE ACTIVITY.
Data retrieved from NASA's ASRS site as of January 2009 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.