# NTSB ANC86LA122: Piper PA-18, N9661P, Mcgrath, AK, August 6, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 5, 1986, 16:00 local (Aug 6, 1986, 00:00 UTC)
- Place: Mcgrath, AK
- Coordinates: 63.609062, -154.779846 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=63.6091&lon=-154.7798&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4711
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC86LA122
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4711/pdf
- Page: https://openairdocs.org/ntsb/ANC86LA122

## Sequence of events

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

- Loss of engine power(partial) - nonmechanical, maneuvering
  - fuel system,line - ice (contributing factor)
  - terrain condition - high terrain (contributing factor)
  - procedures/directives - not followed, pilot in command (cause)
- In flight collision with object, maneuvering

## Analysis

THE PILOT STATED THAT DURING THE CLIMBOUT THE ENGINE BEGAN TO SPUTTER, LOST POWER AND CRASHED INTO A WOODED AREA. EXAMINATION OF THE AIRCRAFT REVEALED HEAVY CARBURETOR ICING.

## Aircraft

- Registration: [N9661P](https://openairdocs.org/deregistered/N9661P-2011-06-13), registration cancelled 2011-06-13, S/N 18-7509006 (OpenAirDocs)
- Reported make and model: PIPER PA-18
- Registry model: [Piper PA-18-150](https://openairdocs.org/model/piper-pa-18-150) (registry code 7101828) (OpenAirDocs)
- Category: Airplane
- Serial number: 187509006
- Engines: LYCOMING O-320 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Spencer Lyman
- Airworthiness certificate: Standard, Normal

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: front

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 160 statute miles
- Lowest ceiling: none
- Temperature: 70 °F, dew point 30 °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 19860805037519A](https://openairdocs.org/incident/19860805037519A), Aug 5, 1986: Piper PA18150, Mcgrath, AK, Substantial damage. Engine sputtered and lost power on takeoff climb. Crashed in trees. Carburetor loaded with ice. Mishap unreported.

## Other investigations on N9661P (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 MKC76DTG16](https://openairdocs.org/ntsb/MKC76DTG16), Jun 10, 1976: Piper PA-18 (N9661P), Crosby, ND, 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.