ASN Wikibase Occurrence # 363495
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| Date: | Saturday 13 June 1992 |
| Time: | 11:35 LT |
| Type: |  Hughes 369E |
| Owner/operator: | Oklahoma City Police Dept |
| Registration: | N684F |
| MSN: | 0491E |
| Total airframe hrs: | 442 hours |
| Engine model: | Allison 250-C20B |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Yukon, OK -
 United States of America
|
| Phase: | Landing |
| Nature: | Unknown |
| Departure airport: | Oklahoma City, OK |
| (F29) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE MANUFACTURER'S TRAINING PILOT WAS CONDUCTING UNAPPROVED 'ZERO AIRSPEED' AUTOROTATION TRAINING IN CONJUNCTION WITH ANNUAL PROFICIENCY TRAINING FOR THE POLICE AVIATION SUPPORT UNIT. HE WAS NOT A CERTIFIED FLIGHT INSTRUCTOR. AFTER HE DEMONSTRATED THE MANEUVER, THE POLICE PILOT ATTEMPTED IT. THE HELICOPTER CONTACTED THE GROUND WITH LOW MAIN ROTOR RPM AND NOT IN A LEVEL ATTITUDE. THE MAIN ROTOR BLADES SEVERED THE TAIL OF THE HELICOPTER. THE POLICE PILOT STATED THAT THIS AND OTHER EMERGENCY PROCEDURE MANEUVERS WERE NOT COVERED IN THE BRIEFING CONDUCTED BEFORE THE FLIGHT.
Probable Cause: THE DUAL STUDENT'S FAILURE TO MAINTAIN ADEQUATE MAIN ROTOR RPM AND FAILURE TO LEVEL THE HELICOPTER AT TOUCHDOWN. FACTORS WERE THE MANUFACTURER'S TRAINING PILOT'S INADEQUATE SUPERVISION AND THE DUAL STUDENT PERFORMING THE MANEUVER.
Accident investigation:
 |
|
Sources:
NTSB FTW92GA160
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 18-Mar-2024 17:56 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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