NTSB Identification: MIA84IA177.
The docket is stored on NTSB microfiche number 24531.
Incident occurred Sunday, June 03, 1984 in WEST PALM BEACH, FL
Aircraft: GRUMMAN G-111, registration: N112FB
Injuries: 3 Uninjured.

NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

AFTER A REPOSITIONING FLT, THE MAIN GEAR COLLAPSED. AN EXAM OF THE HAND PUMP SELECTOR CONTROL VALVE REVEALED THAT ONE OF THE TWO DUMP PORTS FOR THR FLAP POSITION HAD A HYDRAULIC LEAK. REPORTEDLY, THIS ALLOWED SYSTEM PRESSURE TO RETRACT THE GEAR. THE VALVE, P/N 9055-1, HAD A TOTAL FLT TIME OF 1662.8 HRS SINCE BEING INSTALLED ON 7/21/81.

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

HYDRAULIC SYSTEM..LEAK

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

LANDING GEAR,NORMAL RETRACTION/EXTENSION ASSEMBLY..ERRATIC

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