# NTSB MIA84IA177: Grumman G-111, N112FB, West Palm Beach, FL, June 3, 1984

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: June 3, 1984, 08:13 local (12:13 UTC)
- Place: West Palm Beach, FL
- Coordinates: 26.659561, -80.090065 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=26.6596&lon=-80.0901&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 31041
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA84IA177
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/31041/pdf
- Page: https://openairdocs.org/ntsb/MIA84IA177

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Gear collapsed, taxi - from landing
  - hydraulic system - leak (cause)
  - landing gear,normal retraction/extension assembly - erratic (cause)

## Analysis

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.

## Aircraft

- Registration: [N112FB](https://openairdocs.org/deregistered/N112FB-2024-03-25), registration cancelled 2024-03-25, S/N 148328, built 1979 (OpenAirDocs)
- Reported make and model: GRUMMAN G-111
- Registry model: [Grumman Aircraft ENG G-111](https://openairdocs.org/model/grumman-aircraft-eng-g-111) (registry code 3950410) (OpenAirDocs)
- Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs)
- Category: Airplane
- Serial number: 148328
- Airframe hours: 8458
- Engines: WRIGHT R-1820-82 1475 horsepower reciprocating
- Damage: Minor damage
- Flight: Positioning, Part 91
- Registered owner: Chalk'S Int'L Airlines
- Airworthiness certificate: Standard, Transport
- Last inspection: AAIP, June 2, 1984, 1,027 hours before
- Departed: FLL, FT.LAUDERDALE, FL
- Destination: PBI, WEST PALM BEACH, FL
- Airport: PBI, West Palm Beach, runway 9, 7,991 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 37; airline transport; airplane ratings: multi-engine land, multi-engine sea; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 6,000 total, 2,000 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 260° at 4 knots
- Visibility: 7 statute miles
- Lowest ceiling: none
- Temperature: 70 °F, dew point 63 °F
- Altimeter: 30.00 inHg
- Observed at: PBI

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Incident 19840603024919I](https://openairdocs.org/incident/19840603024919I), Jun 3, 1984: Gruman G111, West Palm Beach, FL, Minor damage. Complete gear collapse on rollout. Cause undetermined.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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