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Atlas / NTSB / ANC21LA040

NTSB CAROL · Event

Event ANC21LA040

2021-05-10 Gakona, Alaska, United States None 1 aircraft Status: Completed

Registry · N5489H

FAA Aircraft Registry record.

Make / Model

PIPER PA-18-105 SPECIAL

Year of manufacture

1950 · 71 years old at event

Engine

LYCOMING 0-235 SERIES (115 hp)

Seats / Engines

2 seats · 1 engine

Last airworthiness date

19570528

ADS-B equipped

Yes — Mode-S A6F93F

Registrant of record

MCMAHAN CHARLES B

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot’s decision to initiate a flight with a failed mixture control cable which resulted in a total loss of engine power.

Factual narrative

The pilot of the tailwheel-equipped airplane reported that, the mixture control had been "working really hard" during the initial flight, so he landed at a remote site to investigate. Once on the ground, he found that the mixture control cable, just behind the instrument panel, had failed. He manually opened the mixture control lever and departed for his destination airport. While en route, at about 700 ft above ground level the engine lost all power. He made an emergency off-airport landing to a heavily forested area and the airplane impacted several small to medium sized spruce trees. The airplane sustained substantial damage to the wings and left lift strut. The pilot stated that after the accident, he found the mixture control arm had that the mixture control arm had become detached from his previous temporary repair, and it was in the closed position. Additionally, he noted that he made a poor decision to fly the airplane with a failed mixture control cable. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).

  • Aircraft-Aircraft power plant-Engine controls-Mixture control-Inoperative
  • Personnel issues-Action/decision-Info processing/decision-Decision making/judgment-Pilot

Verbatim from NTSB's published report. Source file NTSB_2021_ANC21LA040.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.