NTSB CAROL · Event
Event CEN12LA308
Aircraft involved
Probable cause & findings
A partial loss of engine power for undetermined reasons and the pilot’s failure to maintain airspeed, which resulted in an aerodynamic stall.
Factual narrative
On May 20, 2012, at 1720 eastern daylight time, a Piper PA-28-180, N4595T, collided with the terrain shortly after takeoff from the Wm "Tiny" Zehnder Field (66G), Frankenmuth, Michigan. The private pilot was not injured and three passengers received minor injuries. The airplane was substantially damaged. The 14 Code of Federal Regulations Part 91 personal flight was operating in visual meteorological conditions and no flight plan was filed. The flight originated just prior to the accident and the planned destination was the Plymouth-Mettetal Airport (1D2), Plymouth, Michigan. The pilot reported the engine performed normally during a pre-takeoff engine run-up. The trim was set for takeoff and 25 degrees of flaps were extended prior to taking off. The pilot applied the brakes and advanced the throttle prior to releasing the brakes to begin the takeoff. He reported he applied back pressure on the control yoke and the airplane lifted off in the first half of the runway length. He stayed in ground effect as the airspeed reached Vx 74 knots and then began the climb at a speed of Vy 85 knots. The engine operated normally during this period. The pilot reported that a few seconds after the airplane departed ground effect, he then noticed the airplane was not climbing as “strongly”. He then noticed a “dramatic” decrease in the airplane’s rate of climb. At this point the pilot retracted the flaps and noticed the engine power had decreased to 2,000 rpm. The pilot verified that the mixture was full rich and he cycled the throttle control with no increase in engine power. The pilot reported that because of the high pitch attitude and the decrease in engine power, the left wing began to stall. He banked the airplane to the left toward a wheat field to avoid the powerlines and trees ahead. The airplane began a rapid descent. The pilot reduced the engine power to idle, extended 25 degrees of flaps, and applied back pressure on the control yoke to lessen the impact. The airplane impacted the terrain and cartwheeled prior to coming to rest inverted which resulted in substantial damage to the wings, fuselage, and empennage. A postaccident examination of the engine was conducted. The examination did not reveal any mechanical failure/malfunction that would have resulted in a loss of engine power. The takeoff was made on runway 09, a 2,530 foot long grass airstrip that contained 4-inch high grass. The high tension wires and the trees are approximately 3,680 feet and 4,000 feet from the end of the runway respectively. The pilot provided a copy of the weight and balance calculations he made prior to the flight. The empty weight used by the pilot was 138 pounds less than the empty weight listed on the latest weight and balance information for the airplane. Calculations which used the correct empty weight along with the loading information provided by the pilot indicate the airplane was within the center of gravity envelope and 71 pounds under maximum gross weight. The pilot reported having a total of 74.7 hours of flight time, 10.2 hours of which were in the accident make and model airplane. Weather conditions recorded at the Saginaw-Browne Airport (MBS), located about 15 miles northwest of the accident site, at 1753, were: wind 170 degrees at 11 knots gusting to 16 knots; clear sky; visibility 10 miles; temperature 31 degrees Celsius; dew point 11 degrees Celsius, and altimeter 30.01 inches of mercury. According to the Federal Aviation Administration probability of carburetor icing chart a possibility carburetor icing existed at glide and cruise power. The accident airport elevation was 645 feet. Based on the local weather data, the corresponding density altitude was about 1,930 feet. The engine performed normally during a pre-takeoff engine run-up, and the pilot selected 25 degrees of flaps for the short-field/soft-field takeoff procedure. The airplane lifted off in the first half of the runway and stayed in ground effect until the best rate of climb airspeed was achieved. The engine operated normally during this period. The pilot reported that, a few seconds after the airplane departed ground effect, he noticed that the airplane was not climbing as “strongly,” which was followed by a “dramatic” decrease in the airplane’s rate of climb. The pilot retracted the flaps and noticed that the engine power decreased to 2,000 rpm at which time the left wing began to stall. He banked the airplane to the left toward a wheat field to avoid the powerlines and trees ahead. The airplane began a rapid descent. The airplane impacted the terrain, cartwheeled, and came to rest inverted. A postaccident examination of the engine did not reveal any mechanical failures or malfunctions that would have resulted in a loss of engine power. The airplane was about 71 pounds under gross weight. The airport field elevation was 645 feet, and the density altitude was about 1,930 feet. A possibility of carburetor icing existed at glide and cruise power. However, the engine was operating at a high power setting for takeoff, indicating that carburetor ice was likely not the reason for the loss of engine power. 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).
- C Aircraft-Aircraft power plant-Power plant-(general)-Not specified - C
- C Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
- C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Airspeed-Not attained/maintained - C
Verbatim from NTSB's published report. Source file
NTSB_2012_CEN12LA308.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
Beyond the agency record
Search this event elsewhere.
Pre-filled searches into the sources where news + community discussion of aviation events lives. External sources are reported, not agency. Treat them as signal that something happened, not as fact about what happened.
Entity-clustered aviation events in the press — last 24 hr + 30-day archive.
Official agency record + docket.
Investigative docket: factual reports, photos, transcripts.
Long-running aviation incident database (Flight Safety Foundation).
Community NTSB synthesis blog — often has photos and witness reports.
Gold-standard aviation incident blog.
Aviation industry news search.
GA pilot forum — informed but rumor-prone.
GA pilot subreddit search.
Tail-number page — flight history (free tier limited).
AOPA Air Safety Institute search.
Mainstream press coverage. Recent events only.
Privacy-preserving news search.
External links open in a new tab. We don't ingest their content; we deep-link search queries.
Related research
What the literature says.
Academic papers and agency reports matching this event's aircraft type or causal vocabulary (icing, stall). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- arXiv 2023 · arXiv preprint
Variation of Critical Crystallization Pressure for the Formation of Square Ice in Graphene Nanocapillaries
Two-dimensional square ice in graphene nanocapillaries at room temperature is a fascinating phenomenon and has been confirmed experimentally.
- arXiv 2022 · arXiv preprint
Enhanced Prediction of Three-dimensional Finite Iced Wing Separated Flow Near Stall
Icing on three-dimensional wings causes severe flow separation near stall. Standard improved delayed detached eddy simulation (IDDES) is unable to correctly predict the separating reattaching flow due…
- NASA NTRS 2019 · Contractor Report (CR)
An Evaluation of an Analytical Simulation of an Airplane with Tailplane Icing by Comparison to Flight Data
This report presents the assessment of an analytical tool developed as part of the NASA/FAA Tailplane Icing Program. The analytical tool is a specialized simulation program called TAILSM4 which was de…
- NASA NTRS 2019 · Technical Publication (TP)
NASA/FAA Tailplane Icing Program: Flight Test Report
This report presents results from research flights that explored the characteristics of an ice-contaminated tailplane using various simulated ice shapes attached to the leading edge of the horizontal …
- NASA NTRS 2019 · Other
[Tail Plane Icing]
The Aviation Safety Program initiated by NASA in 1997 has put greater emphasis in safety related research activities. Ice-contaminated-tailplane stall (ICTS) has been identified by the NASA Lewis Icin…
- Embry-Riddle Scholarly Commons 2019 · Journal article (IJAAA)
Airport Policing in Pakistan: Structure, Training, and Issue
Airports are strategically and economically important installations of any country. Airports are the gateway of any country and any incidents at these gateways may harm the very aspects of a country i…
Browse the full corpus — academia portal ↗