# NTSB ANC91LA141: Cessna 170-B, N2487D, Iowa Ridge, AK, September 4, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 3, 1991, 18:00 local (Sep 4, 1991, 02:00 UTC)
- Place: Iowa Ridge, AK
- Coordinates: 64.809631, -147.71965 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=64.8096&lon=-147.7197&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report January 22, 1993
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5616
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC91LA141
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5616/pdf
- Page: https://openairdocs.org/ntsb/ANC91LA141

## Probable cause

THE PILOT-IN-COMMAND'S FAILURE TO IDENTIFY THE ROUGH AND UNEVEN, UNSUITABLE TERRAIN.  CONTRIBUTING TO THE ACCIDENT WAS THE ROUGH AND UNEVEN TERRAIN.

## Sequence of events

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

- Hard landing, landing - flare/touchdown
  - terrain condition - rough/uneven (contributing factor)
  - unsuitable terrain or takeoff/landing/taxi area - not identified, pilot in command (cause)
- Nose down, landing - flare/touchdown

## Analysis

AFTER A HARD LANDING ON THE GRAVEL BAR, THE AIRPLANE WENT UP ON ITS NOSE. THE PILOT DID STATE THAT THE GRAVEL AIRSTRIP WAS ROUGHER THAN PREVIOUS LANDINGS.

## Aircraft

- Registration: [N2487D](https://openairdocs.org/aircraft/N2487D), registered now, S/N 20639, built 1952 (OpenAirDocs)
- Reported make and model: CESSNA 170-B
- Registry model: [Cessna 170B](https://openairdocs.org/model/cessna-170b) (registry code 2072306) (OpenAirDocs)
- Registry engine: [Continental C145 series](https://openairdocs.org/engine/continental-c145-series) (registry code 17012, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 2520639
- Airframe hours: 4762
- Engines: CONTINENTAL O-300-A 145 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Robin And Sharon Luchini
- Registered owner: Robin And Sharon Luchini
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, February 23, 1991, 113 hours before
- Departed: FAI, FAIRBANKS, AK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 57; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; flight hours: 715 total, 615 in this make and model, 680 as pilot in command, 60 in the last 90 days, 25 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 90° at 5 knots
- Visibility: 99 statute miles
- Lowest ceiling: none
- Temperature: 50 °F, dew point 37 °F

## Other investigations on N2487D (2)

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 ANC88LA084](https://openairdocs.org/ntsb/ANC88LA084), Jul 9, 1988: Cessna 170B (N2487D), Anchorage, AK, substantial damage
- [NTSB ANC83LA086](https://openairdocs.org/ntsb/ANC83LA086), May 23, 1983: Cessna 170 (N2487D), Central, AK, 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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.