Mark Rock EVOLUTION
N171S is a Mark Rock EVOLUTION, a fixed-wing airplane with one motor with a piston engine, built in 2017. It has 4 seats. It is registered to Cotterkey N171S LLC, an LLC in Phoenix, Arizona. The registration is valid: it was issued on February 25, 2025 and expires on February 29, 2032. It holds an experimental airworthiness certificate for amateur built, dated December 27, 2020.
Aircraft
- Maker
- Mark Rock
- Model
- EVOLUTION
- Serial number
- EVO-0079
- Type
- Fixed-wing, single engine
- Power
- Piston (reciprocating), 1 motor · P&W PT6A SERIES · 500 hp
- Seats
- 4
- Year built
- 2017
- Kit
- LANCAIR INTL INC EVOLUTION
- Transponder code
- A11E74 (octal 50217164)
Registration
- Status
- Valid registration
- Certificate issued
- February 25, 2025
- Expires
- February 29, 2032
- Last FAA action
- February 25, 2025
- Airworthiness
- Experimental · Amateur built · December 27, 2020
- FAA region
- Western-Pacific
- FAA record id
- 01250303
Owner as the FAA publishes it
- Name
- Cotterkey N171S LLC
- Type
- LLC
- Address
- PO Box 35800
Phoenix, AZ 85069-5800
Owners can ask the FAA to withhold their name and address from public files. When they do, those fields are blank here as well. How that works.
Documents on file 0
No bills of sale, loans or other documents are indexed against this tail number.
Earlier use of this number 1
Records check free · 3 to understand · 2 clear
The public federal record on N171S, read the way a buyer, lender or insurer reads it: FAA registration, prior tail numbers keyed on the serial number, reuse of the tail number, recent registry filings, and the NTSB accident record under this and every earlier registration.
Valid registration to Cotterkey N171S LLC, an LLC, certificate issued February 25, 2025, expires February 29, 2032. No fractional interest recorded. [1]
The airworthiness certificate on file is dated December 27, 2020, 3 years after the 2017 manufacture year. A re-issued certificate commonly follows export and re-import, a rebuild, or a return to the register after cancellation. The cause is documented in the FAA aircraft records file, which the full report obtains. [1]
No earlier tail number is recorded against serial EVO-0079 for this model in the deregistered file. [2]
N171S was previously assigned to 1 other aircraft: Beech H50 (serial HH-125, cancelled June 8, 2011). Histories keyed to the tail number alone can mix aircraft up; this check keys on the serial number. [2]
No bills of sale, loans or releases have reached the registry in recent weeks. The index covers only recent filings; older liens are in the records file. [3]
2 NTSB records under N171S: Accident on October 17, 2004 at Hartwood, VA: fatal, destroyed (1 fatal). Accident on July 14, 1991 at Hartwood, VA: minor injuries, substantial damage. Details below. [4]
These live in the FAA aircraft records file (every document ever filed against the aircraft) and, for larger aircraft, the International Registry. Part of the full report.
AD compliance against the logbooks and flight-activity reconciliation are researched layers of the full report.
NTSB records 2
Aircraft on the NTSB record: Beech H50 · operated under 091
The pilot's inadequate preflight preparation, which resulted in an attempted takeoff with full flaps, and subsequent loss of control.
Full record in plain English · Docket and reports at the NTSB
Aircraft on the NTSB record: Beech H50 · operated under 091
THE PARACHUTIST FAILURE TO PROPERLY MONITOR AND SECURE HIS RELEASE HANDLE TO PROTECT AGAINST ACCIDENTAL PARACHUTE DEPLOYMENT.
Full record in plain English · Docket and reports at the NTSB
- FAA Releasable Aircraft Database, master file, file of October 2, 2026. registry.faa.gov/
- FAA deregistered aircraft file (part of the same download), file of October 2, 2026. registry.faa.gov/
- FAA document index: registry documents received in recent weeks, file of October 2, 2026. registry.faa.gov/
- NTSB aviation accident database (CAROL), records through September 30, 2026. data.ntsb.gov/carol-main-public/basic-search
This automated check reads the public federal record. Nothing here is a legal opinion, an appraisal or a statement about the aircraft's condition; a CLEAR line is a statement about the searched record, not the aircraft.
Source: FAA Civil Aviation Registry, Releasable Aircraft Database, October 2, 2026. See this record on the FAA site · This record as data