Aero Commander 680FL N111UA

Summary

On 2 September 1987 at about 19:25 local time, a Aero Commander 680FL registered N111UA was involved in an accident near St Thomas. 7 people were on board and nobody was injured. The aircraft was substantially damaged. No probable cause statement is available for this record.

Date

2 September 1987 at 19:25

Classification

Accident

Location

St Thomas

Nearest airport

Cyril E. King (STT)

Coordinates

Not recorded

Aircraft

Aero Commander 680FL

Registration

N111UA

Category

Airplane

Engines

2

Operator

Not recorded

Operating rule

Part 135: Air Taxi & Commuter

Purpose of flight

Unknown

Phase of flight

Not recorded

Route

Dominica, Uk → Unknown

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

MIA87LA238

Nobody was injured.

The NTSB has not published a probable cause for this record. No probable cause statement is present in the source data.

Nothing about the cause is stated here that is not in the source record.

Read the full NTSB narrative

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.

Quoted verbatim from the NTSB record.