# NTSB SEA89LA093: Piper PA-22-150, N6121D, Black Diamond, WA, May 28, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 28, 1989, 08:44 local (15:44 UTC)
- Place: Black Diamond, WA
- Coordinates: 47.319538, -121.989486 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.3195&lon=-121.9895&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 March 12, 1990
- Report: Approved by Office Director
- NTSB case key (mKey): 41018
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA89LA093
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41018/pdf
- Page: https://openairdocs.org/ntsb/SEA89LA093

## Probable cause

POWER LOSS DUE TO MAGNETO FAILURE. CONTRIBUTING TO THE ACCIDENT WERE LACK OF SUITABLE TERRAIN FOR FORCED LANDING AND THE PRESENCE OF OBSTACLES.

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, takeoff - initial climb
  - ignition system,magneto - disengaged (cause)
- Forced landing, landing
  - terrain condition - none suitable (contributing factor)
- On ground/water collision with object, landing - roll
  - object - utility pole (contributing factor)

## Analysis

AFTER LIFTOFF, THE ENGINE BEGAN MISFIRING AND THE PLT WAS UNABLE TO CLEAR OBSTACLES AHEAD. A TURN WAS MADE TO EFFECT A FORCED LANDING ON A PARALLEL ROADWAY. DURING ROLLOUT, THE LEFT WING STRUCK A POWER POLE. INVESTIGATION REVEALED THE LEFT MAGNETO ROTOR GEAR HAD STRIPPED.

## Aircraft

- Registration: [N6121D](https://openairdocs.org/deregistered/N6121D-2013-02-11), registration cancelled 2013-02-11, S/N 22-4765, built 1957 (OpenAirDocs)
- Reported make and model: PIPER PA-22-150
- Registry model: [Piper PA-22-150](https://openairdocs.org/model/piper-pa-22-150) (registry code 7102210) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 22-4765
- Airframe hours: 2803
- Engines: LYCOMING O-320-E2A 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Nancy K. Jensen
- Registered owner: Nancy K Jensen
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, December 29, 1988, 31 hours before
- Destination: 150, PUYALLUP, WA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 45; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: right; flight hours: 701 total, 215 in this make and model, 14 in the last 90 days, 7 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 190° at 7 knots
- Visibility: 7 statute miles
- Lowest ceiling: 3,500 ft broken
- Temperature: 46 °F, dew point 45 °F
- Altimeter: 30.00 inHg
- Observed at: SEA, 15 nm away

## Other investigations on N6121D (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 SEA66F0071](https://openairdocs.org/ntsb/SEA66F0071), Aug 5, 1965: Piper PA-22 (N6121D), Spokane, WA, 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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