# NTSB ATL91LA002: Mooney M20E, N9315V, Greensboro, NC, October 7, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 7, 1990, 19:21 local (23:21 UTC)
- Place: Greensboro, NC
- Coordinates: 36.119667, -79.889968 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=36.1197&lon=-79.8900&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 15, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 8348
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL91LA002
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/8348/pdf
- Page: https://openairdocs.org/ntsb/ATL91LA002

## Probable cause

THE FAILURE OF THE RUBBER/METAL COUPLING IN THE LANDING GEAR ACTUATOR ASSEMBLY, WHICH RESULTED IN THE INABILITY OF THE PILOT TO LOWER AND LOCK THE LANDING GEAR.

## Sequence of events

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

- Gear not extended, approach
  - landing gear,normal retraction/extension assembly - failure,partial (cause)
  - gear extension - attempted, pilot in command (contributing factor)
  - gear down and locked - not possible, pilot in command (contributing factor)
- Gear collapsed, landing - flare/touchdown

## Analysis

THE PILOT WAS IN PREPARATION FOR LANDING WHEN HE WAS UNABLE TO GET A DOWN AND LOCKED INDICATION ON THE LANDING GEAR. AFTER MANEUVERING THE AIRCRAFT, THE GEAR APPEARED TO BE VISUALLY DOWN, HOWEVER NO DOWN AND LOCKED INDICATION WAS SHOWN IN THE COCKPIT. UPON TOUCHDOWN, ALL THREE GEAR COLLAPSED. THE INVESTIGATION REVEALED THAT A RUBBER/METAL COUPLING IN THE LANDING GEAR ACTUATOR ASSEMBLY HAD FAILED, DISABLING NORMAL AND ALTERNATE GEAR EXTENSION CAPABILITY.

## Aircraft

- Registration: [N9315V](https://openairdocs.org/aircraft/N9315V), registered now, S/N 690092, built 1969 (OpenAirDocs)
- Reported make and model: MOONEY M20E
- Registry model: [Mooney M20C](https://openairdocs.org/model/mooney-m20c) (registry code 5870208) (OpenAirDocs)
- Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 700008
- Airframe hours: 1518
- Engines: LYCOMING IO 360 A1A 200 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Hal D. Allman, Sr
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, January 5, 1990, 52 hours before
- Departed: RUQ, SALISBURY, NC
- Destination: GSO
- Airport: GSO, Piedmont Triad Int'L, runway 14, 6,380 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 56; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 968 total, 104 in this make and model, 968 as pilot in command, 23 in the last 90 days, 14 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 210° at 3 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 66 °F, dew point 64 °F
- Altimeter: 30.00 inHg
- Observed at: GSO

## Other investigations on N9315V (1)

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.

- [NTSB ATL85LA026](https://openairdocs.org/ntsb/ATL85LA026), Nov 3, 1984: Mooney M20C (N9315V), Bay St. Louis, MS, substantial damage

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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