# NTSB ANC87LA116: Cessna 172, N7169A, Pt. Mackenzie, AK, August 8, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 8, 1987, 12:05 local (20:05 UTC)
- Place: Pt. Mackenzie, AK
- Coordinates: 61.219226, -149.849685 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.2192&lon=-149.8497&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report July 5, 1988
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4885
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC87LA116
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4885/pdf
- Page: https://openairdocs.org/ntsb/ANC87LA116

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, takeoff - initial climb
  - lubricating system,oil filter/screen - blocked(partial) (cause)
  - lubricating system,oil filter/screen - starvation (cause)
- Forced landing, descent - emergency
- Loss of control - on ground/water, landing - roll
  - terrain condition - soft (contributing factor)
- Nose over, landing - roll

## Analysis

AFTER A COMPLETE ENGINE FAILURE AND AN EMERGENCY LANDING ON THE BEACH, THE PILOT LOST DIRECTIONAL CONTROL OF THE AIRCRAFT CAUSING THE PLANE TO NOSE OVER ON ITS BACK. EXAMINATION OF THE ENGINE REVEALED A BLOCKED OIL SCREEN WHICH CAUSED OIL STARVATION.

## Aircraft

- Registration: [N7169A](https://openairdocs.org/deregistered/N7169A-2015-05-15), registration cancelled 2015-05-15, S/N 29269, built 1956 (OpenAirDocs)
- Reported make and model: CESSNA 172
- Registry model: [Cessna 172](https://openairdocs.org/model/cessna-172) (registry code 2072402) (OpenAirDocs)
- Registry engine: [Continental 0-300 series](https://openairdocs.org/engine/continental-0-300-series) (registry code 17022, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 29269
- Airframe hours: 1570
- Engines: CONTINENTAL O-300-D 145 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Duane J. Hallman
- Registered owner: Duane J. Hollman
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, June 25, 1987, 20 hours before
- Departed: ANC, ANCHORAGE, AK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 40; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 254 total, 102 in this make and model, 201 as pilot in command, 40 in the last 90 days, 20 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 66 °F, dew point 61 °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 19870808045209A](https://openairdocs.org/incident/19870808045209A), Aug 8, 1987: Cessna 172, Port Mackenzie, AK, Substantial damage. The engine failed on takeoff. The aircraft nosed over on landing. Use of detergent oil caused oil screen to clog.

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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