ASN Wikibase Occurrence # 56472
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| Date: | Thursday 20 August 1992 |
| Time: | 12:03 LT |
| Type: | Bell XV-15 |
| Owner/operator: | Bell Helicopter Textron |
| Registration: | N702NA |
| MSN: | 0001 |
| Year of manufacture: | 1977 |
| Total airframe hrs: | 841 hours |
| Engine model: | Lycoming LTC1K-4K |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Fort Worth, TX -
 United States of America
|
| Phase: | Taxi |
| Nature: | Unknown |
| Departure airport: | (KARL) |
| (KARL) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
DURING A DEMONSTRATION FLIGHT OF THE TILTROTOR AIRCRAFT, THE LEFT PROPROTOR GOVERNOR DISCONNECTED DUE TO A MISSING SAFETY ON THE CASTELLATED NUT THAT SECURES THE PROPROTOR TO THE GOVERNOR LINKAGE. WHEN THE GOVERNOR DISCONNECTED, THE PROPELLER SURGED TO THE MAXIMUM PITCH SETTING AND ROLLED THE AIRCRAFT AROUND THE LONGITUDINAL AXIS. FLIGHT DATA RECORDINGS INDICATED THAT THE AIRCRAFT EXPERIENCED A ROLL TO THE RIGHT THAT BEGAN SLOWLY AND ACCELERATED TO THE INVERTED POSITION IN LESS THAN 3 SECONDS. THE AIRCRAFT IMPACTED THE GROUND INVERTED. NEITHER OCCUPANT COULD EGRESS WITHOUT ASSISTANCE DUE TO INCONSISTENT INSTRUCTIONS FOR EMERGENCY EGRESS.
Probable Cause: INADEQUATE MAINTENANCE AND INSPECTION WHICH RESULTED IN A DISCONNECTED PROPROTOR GOVERNOR LINKAGE.
Accident investigation:
 |
|
Sources:
NTSB FTW92FA215
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 09-Apr-2010 07:09 | TB | Updated [Date, Aircraft type, Registration, Cn, Operator, Total fatalities, Total occupants, Other fatalities, Location, Country, Phase, Nature, Source, Narrative, Plane category, ] |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 10-Apr-2024 18:29 | ASN Update Bot | Updated [Time, Cn, Other fatalities, Phase, Nature, Departure airport, Destination airport, Source, Narrative, Plane category, Accident report] |
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