# NTSB ANC91LA003: Beech B55B, N56AF, Eielson Afb, AK, October 7, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 7, 1990, 12:00 local (20:00 UTC)
- Place: Eielson Afb, AK
- Coordinates: 64.669822, -147.040206 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=64.6698&lon=-147.0402&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report March 12, 1993
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5501
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC91LA003
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5501/pdf
- Page: https://openairdocs.org/ntsb/ANC91LA003

## Probable cause

THE DUAL STUDENT'S INADVERTENT, PREMATURE SELECTION OF THE LANDING GEAR HANDLE TO THE UP POSITION; THEREBY CAUSING THE LANDING GEAR SYSTEM TO RETRACT. CONTRIBUTING TO THE ACCIDENT WAS THE INSTRUCTOR'S FAILURE TO MONITOR THE DUAL STUDENT'S ACTION AND TAKE APPROPRIATE AND TIMELY CORRECTIVE ACTION.

## Sequence of events

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

- Complete gear collapsed, landing - roll
  - gear down and locked - not maintained, dual student (cause)
  - excessive workload (task overload), dual student (cause)
  - supervision - inadequate, pilot in command(cfi) (contributing factor)
  - complacency, pilot in command(cfi) (contributing factor)

## Analysis

THE DUAL STUDENT AND INSTRUCTOR PILOT WERE PRACTICING TOUCH AND GO LANDINGS. AFTER THE LANDING THE DUAL STUDENT APPLIED POWER AND THEN SELECTED THE LANDING GEAR LEVER TO THE 'UP' POSITION. THE INSTRUCTOR STATED HE QUICKLY PLACED THE LANDING GEAR LEVER IN THE DOWN POSITION BUT THE LANDING GEAR CONTINUED TO RETRACT UNTIL THE AIRPLANE SLID TO A STOP ON ITS BELLY.

## Aircraft

- Registration: [N56AF](https://openairdocs.org/deregistered/N56AF-2018-03-05), registration cancelled 2018-03-05, S/N TF-3, built 1965 (OpenAirDocs)
- Reported make and model: BEECH B55B
- Registry model: [Beech 95-B55 (T42A)](https://openairdocs.org/model/beech-95-b55-t42a) (registry code 1152706) (OpenAirDocs)
- Registry engine: [Continental IO-470 series](https://openairdocs.org/engine/continental-io-470-series) (registry code 17044, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: TF-3
- Airframe hours: 11233
- Engines: CONTINENTAL IO-470-L 260 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Registered owner: Eielson Aero Club
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, September 29, 1990, 6 hours before
- Flight plan: VFR
- Airport: EIL, Eielson, runway 31, 14,514 × 150 ft, macadam

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 41; flight instructor, commercial; airplane ratings: single-engine land, multi-engine land, single-engine sea; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: right; flight hours: 1,165 total, 170 in this make and model, 1,119 as pilot in command, 60 in the last 90 days, 20 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Day
- Wind: calm
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 32 °F, dew point -0 °F

## FAA reports on this event (1)

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

- [Accident 19901007044329A](https://openairdocs.org/incident/19901007044329A), Oct 7, 1990: Beech 95B55B, Fairbanks, AK, Substantial damage. Student inadvertently raised landing gear on go portion of touch and go landing. Gear collapsed on runway.

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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