# NTSB CEN26LA100: Piper PA 46-350P, N91MK, Sioux City, IA, January 24, 2026

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Class 3 · Limited · Preliminary report
- Date: January 24, 2026, 07:12 local (13:12 UTC)
- Place: Sioux City, IA
- Coordinates: 42.3675, -96.3778 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.3675&lon=-96.3778&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Defining event: [Takeoff: Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Investigation ongoing
- Investigation class: Class 3
- NTSB office: Central Region
- Parties: FAA
- NTSB case key (mKey): 202341
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN26LA100
- NTSB preliminary report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/202341/pdf
- Page: https://openairdocs.org/ntsb/CEN26LA100

## Preliminary report

On January 24, 2026, about 0712 central daylight time, a Piper PA-46-350P airplane, N91MK, was substantially damaged when it was involved in an accident near Sioux City, Iowa. The pilot and passenger were uninjured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot reported that after the initial climb and immediately after leveling off at 2,500 ft mean sea level, he felt the airplane make two “thugs” and observed the manifold pressure fluctuate. He subsequently observed a drop in engine oil pressure. He stated that he told the Air Traffic Control tower controller that he was going to turn back toward the airport. Once the airplane was on a north heading, a loud “boom” was heard, and a subsequent loss of engine power occurred. The pilot executed a forced landing to a field. During the forced landing, the airplane’s engine and left wing impacted terrain and were separated. The forward fuselage and right wing sustained substantial damage. The pilot stated that on a previous flight, four days before the accident flight, a similar “thug” was observed, but it did not result in any other abnormal indications. The wreckage was retained for further examination.

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Takeoff: Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342) (defining event); cases with it: [Piper PA 46-350P, 1 case](https://openairdocs.org/ntsb-events/342/sequence.md?model=7104620), [All aircraft, 1,858 cases](https://openairdocs.org/ntsb-events/342/sequence.md)

## Aircraft

- Registration: [N91MK](https://openairdocs.org/aircraft/N91MK), registered now, S/N 4636647, built 2014 (OpenAirDocs)
- Reported make and model: PIPER AIRCRAFT INC PA 46-350P
- Registry model: [Piper PA 46-350P](https://openairdocs.org/model/piper-pa-46-350p) (registry code 7104619) (OpenAirDocs)
- Registry engine: [Lycoming TIO-540 series](https://openairdocs.org/engine/lycoming-tio-540-series) (registry code 41569, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 4636647
- Year built: 2014
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Mulaii LLC
- Registered owner: Mulaii LLC
- Destination: Same as departure
- Airport: KSUX

## Weather

- Conditions: Visual (VMC), Night/dark
- Wind: 140° at 3 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: -6 °F, dew point -17 °F
- Altimeter: 30.61 inHg
- Observed at: KSUX, 1 nm away
- METAR: METAR KSUX 241252Z 14003KT 10SM CLR M21/M27 A3061 RMK AO2 SLP398 T12061267=

## 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 20260124000639A](https://openairdocs.org/incident/20260124000639A), Jan 24, 2026: Piper Aircraft Inc PA 46-350P, Sioux City, IA, Substantial damage. Loss of oil pressure and engine power resulted in off-airport landing.

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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