ASN Wikibase Occurrence # 372293
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| Date: | Wednesday 2 September 1987 |
| Time: | 15:25 LT |
| Type: |  Aero Commander 680FL |
| Owner/operator: | Clint Aero, Inc. |
| Registration: | N111UA |
| MSN: | 1370-43 |
| Total airframe hrs: | 9769 hours |
| Engine model: | LYCOMING IO-720-B1B |
| Fatalities: | Fatalities: 0 / Occupants: 7 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Saint Thomas Airport (STT/TIST) -
 U.S. Virgin Islands
|
| Phase: | Approach |
| Nature: | Unknown |
| Departure airport: | Dominica, UK |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
AFTER A LOSS OF HYD PRESSURE, THE RGT MAIN GEAR WOULD NOT FULLY EXTD WHEN THE PLT TRIED TO LOWER THE GEAR FOR LNDG. ALL ATMTS TO LOCK IT INTO PLACE WERE UNSUCCESSFUL. WHEN THE ACFT TOUCHED DOWN DRG THE LNDG, THE RGT MAIN GEAR COLLAPSED.THE ACFT SLID TO A STOP & THE OCCUPANTS WERE EVACUATED. AN INSPN OF THE RGT MAIN GEAR ASSY REVEALED THE HYD ACTUATING CYL HAD FAILED AT THE SNAP RING GROOVE & THE PNEUMATIC ACTUATING CYL HAD FAILED AT THE ROD END. BOTH FAILED FM OVERLOAD.THIS WAS THE 2ND OVERLOAD FAILURE OF THE HYD ACTUATING CYL IN 26 FLT HRS OF OPN. ACCORDING TO A MECHANIC, WHO WAS FAMILIAR WITH THE ACFT, THIS FAILURE WAS CONSISTENT WITH EXCESSIVE PRESSURE IN THE SYS DUE TO A PRESSURE RELIEF/UNLOADERVALVE MALFUNCTION.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB MIA87LA238
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 26-Mar-2024 15:37 | ASN Update Bot | Added |
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