# NTSB ANC91LA056: Cessna C-170B, N2744D, Manley Hot Sprg, AK, May 4, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 3, 1991, 18:00 local (May 4, 1991, 02:00 UTC)
- Place: Manley Hot Sprg, AK
- Coordinates: 64.649497, -150.899353 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=64.6495&lon=-150.8994&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report May 5, 1993
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5541
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC91LA056
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5541/pdf
- Page: https://openairdocs.org/ntsb/ANC91LA056

## Probable cause

THE PILOT'S SELECTING UNSUITABLE TERRAIN FOR LANDING.  CONTRIBUTING TO THE ACCIDENT WAS THE ROUGH LANDING AREA.

## Sequence of events

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

- Main gear collapsed, landing - roll
  - terrain condition - rough/uneven (contributing factor)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)
- Dragged wing,rotor,pod,float or tail/skid, landing - roll
  - landing gear,main gear - collapsed (contributing factor)

## Analysis

THE PILOT STATED THAT JUST AFTER TOUCHDOWN THE RIGHT MAIN LANDING GEAR COLLAPSED, CAUSING THE RIGHT WING TO HIT THE GROUND.  HE FURTHER STATED THAT HE USED POOR JUDGMENT IN SELECTING A ROUGH LANDING AREA AT WHICH TO LAND.  HE HAD DRIVEN TO AND INSPECTED THE LANDING AREA ABOUT 30 MINUTES PREVIOUSLY.

## Aircraft

- Registration: [N2744D](https://openairdocs.org/aircraft/N2744D), registered now, S/N 25286, built 1952 (OpenAirDocs)
- Reported make and model: CESSNA C-170B
- 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: 25286
- Airframe hours: 2479
- Engines: LYCOMING O-360-A1A 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Charles L. Pearson
- Registered owner: Charles L. Pearson
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, October 9, 1990, 50 hours before
- Departed: MLY, MANLEY HOT SPRG, AK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 41; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 708 total, 650 in this make and model, 651 as pilot in command, 22 in the last 90 days, 16 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 45° at 10 knots
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 61 °F, dew point 43 °F
- Altimeter: 29.00 inHg

## 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 19910503014129A](https://openairdocs.org/incident/19910503014129A), May 3, 1991: Cessna 170B, Manley Hot Spri, AK, Substantial damage. Right main gear collapsed while landing on rough ground. Was relocating aircraft too high ground due rising water.

## Other investigations on N2744D (3)

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 MIA71DLD52](https://openairdocs.org/ntsb/MIA71DLD52), Mar 18, 1971: Cessna 170B (N2744D), Kissimmee, FL, substantial damage
- [NTSB MIA69D0400](https://openairdocs.org/ntsb/MIA69D0400), Mar 2, 1969: Cessna 170B (N2744D), Lakeland, FL, substantial damage
- [NTSB MIA67F0470](https://openairdocs.org/ntsb/MIA67F0470), Mar 16, 1967: Cessna 170B (N2744D), Ormond Beach, FL, 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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