ASN Wikibase Occurrence # 377115
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| Date: | Friday 31 May 1985 |
| Time: | 08:25 LT |
| Type: |  Bell 222U |
| Owner/operator: | Aircraft Management Service |
| Registration: | N3180K |
| MSN: | 47516 |
| Total airframe hrs: | 613 hours |
| Engine model: | LYCOMING LTS101-750C-1 |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Milford, VA -
 United States of America
|
| Phase: | En route |
| Nature: | Executive |
| Departure airport: | Richmond, VA (KRIC) |
| Quantico, VA | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE HELO WAS IN LEVEL CRUISE FLT AT 1500 FT AND 115 KTS WHEN THE NO. 2 ENG CHIP LIGHT ILLUMINATED, ACCOMPANIED BY LOWERING OIL PRESSURE. THE PLT REDUCED PWR AND STARTED A RT TURN TO RETURN TO BASE WHEN HALF WAY THRU THE TURN A LOUD BANG OCCURRED FOLLOWED BY COMPLETE POWER LOSS OF BOTH ENGINES AND ENG CMPT FIRE. A SUCCESSFUL AUTOROTATION ENSUED, AND THE FIRE WAS EXTINGUISHED WITH THE ACFT SYSTEM AFTER LNDG. LATER EXAMINATION REVEALED THAT THE NO. 3 BEARING HAD FAILED. ULTIMATELY RELEASING THE PWR TURBINE ASSY FROM THE ENG. THE TURBINE DISC WELDED TO THE TAILPIPE CENTER BODY, FAILING THE DISC. FRAGMENTS STRUCK THE NO. 1 ENGINE WHICH RESULTED IN ITS UNCOMMANDED SHUT DOWN. BOTH ENGINES HAD A LENGTHY HISTORY OF CHIP ALARMS. LYCOMING HAD RECENTLY APPROVED A 100 HR. EXTENSION TO THE RECOMMENDED HOT SECTION INTERVAL AFTER A REVIEW OF MAINT. RECORDS. THREE SCAVENGE CHIP ALARMS OCCURRED DRG THE 50 HRS PRIOR TO THE FAILURE.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB BFO85FA049
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 30-Mar-2024 08:22 | ASN Update Bot | Added |
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