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Bell 206 L-1 helicopter in cruise encountered windshear which caused vibration in main rotor system. Reporter pilot declared an emergency and landed at a private heliport where he was ordered to leave immediately.
| Attributes | |
| ACN | 400005 |
| Time | |
| Date | 199804 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : hi07 |
| State Reference | HI |
| Altitude | msl bound lower : 1400 msl bound upper : 1400 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air taxi |
| Make Model Name | Jet Ranger Undifferentiated or Other Model |
| Operating Under FAR Part | Part 135 |
| Flight Phase | cruise other other other |
| Route In Use | approach : visual |
| Flight Plan | None |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : cfi pilot : instrument pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 25 flight time total : 13000 flight time type : 1000 |
| ASRS Report | 400005 |
| Person 2 | |
| Affiliation | Other |
| Function | other personnel |
| Qualification | other other : other |
| Events | |
| Anomaly | aircraft equipment problem : critical incursion : landing without clearance inflight encounter other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
During cruise flight, while repositioning aircraft from heliport to airport, encountered windshear (vertical) which momentarily caused moderate to heavy 1 to 1 vertical vibration in main rotor system. As I was passing another private airport at the time, I declared emergency (only method to legally land at the private heliport) as precaution. I landed, shut down, and examined aircraft. Finding all ok, I called base to inform them of emergency declaration and precautionary landing. After discussing windshear event and examining aircraft with locally based mechanic, I restarted aircraft and continued to home base. No further vibrations noted. Landed both times uneventfully. Note: reinforcing my decision to declare emergency in order to land at the private heliport, I was approached by a ground attendant and ordered to leave immediately. I was told I was not permitted to land at the private heliport and the person was not interested in my precautionary reasons for landing.
Original NASA ASRS Text
Title: BELL 206 L-1 HELI IN CRUISE ENCOUNTERED WINDSHEAR WHICH CAUSED VIBRATION IN MAIN ROTOR SYS. RPTR PLT DECLARED AN EMER AND LANDED AT A PVT HELIPORT WHERE HE WAS ORDERED TO LEAVE IMMEDIATELY.
Narrative: DURING CRUISE FLT, WHILE REPOSITIONING ACFT FROM HELIPORT TO ARPT, ENCOUNTERED WINDSHEAR (VERT) WHICH MOMENTARILY CAUSED MODERATE TO HVY 1 TO 1 VERT VIBRATION IN MAIN ROTOR SYS. AS I WAS PASSING ANOTHER PVT ARPT AT THE TIME, I DECLARED EMER (ONLY METHOD TO LEGALLY LAND AT THE PVT HELIPORT) AS PRECAUTION. I LANDED, SHUT DOWN, AND EXAMINED ACFT. FINDING ALL OK, I CALLED BASE TO INFORM THEM OF EMER DECLARATION AND PRECAUTIONARY LNDG. AFTER DISCUSSING WINDSHEAR EVENT AND EXAMINING ACFT WITH LOCALLY BASED MECH, I RESTARTED ACFT AND CONTINUED TO HOME BASE. NO FURTHER VIBRATIONS NOTED. LANDED BOTH TIMES UNEVENTFULLY. NOTE: REINFORCING MY DECISION TO DECLARE EMER IN ORDER TO LAND AT THE PVT HELIPORT, I WAS APCHED BY A GND ATTENDANT AND ORDERED TO LEAVE IMMEDIATELY. I WAS TOLD I WAS NOT PERMITTED TO LAND AT THE PVT HELIPORT AND THE PERSON WAS NOT INTERESTED IN MY PRECAUTIONARY REASONS FOR LNDG.
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.