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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Reporter indicates that literal application of FAA rule to fly runway magnetic heading no drift correction could cause an small aircraft pilot lifting off early on long runway to drift laterally before leaving confines of the airport.
| Attributes | |
| ACN | 159799 |
| Time | |
| Date | 199010 |
| Place | |
| Locale Reference | airport : zzz |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : yqt |
| Operator | other |
| Make Model Name | Small Aircraft |
| Flight Phase | climbout : takeoff climbout : initial |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : commercial pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 200 flight time total : 8000 |
| ASRS Report | 159799 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : non radar |
| Events | |
| Anomaly | non adherence : published procedure non adherence : far other spatial deviation |
| Independent Detector | other other : unspecified cockpit |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
| Publication | Unspecified |
Narrative:
The new 1990 aim update includes a definition of 'runway heading.' it states that when the pilot is cleared to fly runway heading that the pilot should fly the name of the runway and not apply drift. This was written primarily for simultaneous departures at a radar environment but will, due to inherent ambiguities, be applied by many pilots to all departures that reference runway heading in the departure. Since zone 1 of departures (diverse) is centered as runway centerline, the pilot should attempt to fly the magnetic heading of the runway versus the name and should apply drift to make sure the aircraft enters zone 1 at the departure end of the runway. In some cases, it is possible for an aircraft to miss zone 1 at the departure end due to heading and drift combining errors. This could be entirely unsafe and lead to flight into terrain or obstacles.
Original NASA ASRS Text
Title: REPORTER INDICATES THAT LITERAL APPLICATION OF FAA RULE TO FLY RWY MAGNETIC HEADING NO DRIFT CORRECTION COULD CAUSE AN SMA PLT LIFTING OFF EARLY ON LONG RWY TO DRIFT LATERALLY BEFORE LEAVING CONFINES OF THE ARPT.
Narrative: THE NEW 1990 AIM UPDATE INCLUDES A DEFINITION OF 'RWY HDG.' IT STATES THAT WHEN THE PLT IS CLRED TO FLY RWY HDG THAT THE PLT SHOULD FLY THE NAME OF THE RWY AND NOT APPLY DRIFT. THIS WAS WRITTEN PRIMARILY FOR SIMULTANEOUS DEPS AT A RADAR ENVIRONMENT BUT WILL, DUE TO INHERENT AMBIGUITIES, BE APPLIED BY MANY PLTS TO ALL DEPS THAT REF RWY HDG IN THE DEP. SINCE ZONE 1 OF DEPS (DIVERSE) IS CENTERED AS RWY CENTERLINE, THE PLT SHOULD ATTEMPT TO FLY THE MAGNETIC HDG OF THE RWY VERSUS THE NAME AND SHOULD APPLY DRIFT TO MAKE SURE THE ACFT ENTERS ZONE 1 AT THE DEP END OF THE RWY. IN SOME CASES, IT IS POSSIBLE FOR AN ACFT TO MISS ZONE 1 AT THE DEP END DUE TO HDG AND DRIFT COMBINING ERRORS. THIS COULD BE ENTIRELY UNSAFE AND LEAD TO FLT INTO TERRAIN OR OBSTACLES.
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.