# Klaas Development LANCAIR IV-P - Type: Aircraft model (FAA registry) - Registry code: 05607KF - Manufacturer (registry): KLAAS DEVELOPMENT INC - Model: LANCAIR IV-P - Aircraft type: Fixed wing single engine - Category: Airplane - Engines: 1 · Reciprocating - Seats: 4 - Weight class: Up to 12,499 lb - Certification: Not type certificated - Registered aircraft: 0 - Page: https://openairdocs.org/model/klaas-development-lancair-iv-p Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker. ## ADs that may apply (OpenAirDocs) Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment. None matched. ## Registered aircraft None registered with this model now. ## NTSB investigations (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 ERA14FA421](https://openairdocs.org/ntsb/ERA14FA421), Sep 3, 2014: Klaas Development Lancair IV P (N541EM), Ooltewah, TN, substantial damage, 1 fatal. Probable cause: The inadequate torque of the propeller mounting bolts and inspection of the propeller, which resulted in the fatigue fracture of the bolts and a subsequent in-flight separation of the propeller… ## FAA accident and incident reports (2) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Accident 20140903023579A](https://openairdocs.org/incident/20140903023579A), Sep 3, 2014: Klaas Development Inc LANCAIR IV-P (N541EM), Ooltewah, TN, Destroyed, 1 fatal. Shortly after reaching cruise altitude the pilot reported that he was "having trouble holding altitude," he then descended to 15,000 feet MSL, reported "engine… - [Incident 20100319029689I](https://openairdocs.org/incident/20100319029689I), Mar 19, 2010: Klaas Devel LANCAIR IV- (N541EM), Carrolton, GA, Minor damage. According to statement from pilot, while enroute from tys direct to dts at approx. 16000 ft cabin door window failed and departed aircraft. Pilot declared… ## Service difficulty reports (3) As reported by operators and repair stations, by the model named in the report. - [SDR 2025FA0000532](https://openairdocs.org/sdr/2025FA0000532), Jul 31, 2025: WINDSHIELD. FRACTURED. LANCAIR IV-P, WHILE IN PRESSURIZED CRUISE FLIGHT AT 15,500' MSL AND 245KTS, A LARGE PORTION OF THE WINDSHIELD FRACTURED AND SEPARATED FROM THE AIRCRAFT. AN IMME - [SDR 2013FA0000412](https://openairdocs.org/sdr/2013FA0000412), Jul 1, 2013: CRANKSHAFT. CRACKED. ENGINE OVERHAULED 105 HOURS AGO, AND CRANK WAS ULTRASOUND TESTED OK. NO INCIDENTS OF ANY KIND HAVE EVER OCCURRED WITH THIS ENGINE OR PROPELLER, SUCH AS PROP STR - [SDR 2012FA0000352](https://openairdocs.org/sdr/2012FA0000352), Jun 4, 2012: WINDOW. DEPARTED. DURING CRUISE AT 20,000 FT, HEARD A BANG, AND THEN PILOT`S EARS POPPED. DESCENDED TO 11,000 FT. A PHYSICAL REVIEW OF ACFT REVEALED THE LT REAR WINDOW BEHIND ENT ## The same model under other registry codes Amateur-built copies and renamed makers get their own codes. - [Pratt Dennis C LANCAIR IV P](https://openairdocs.org/model/pratt-dennis-c-lancair-iv-p): 1 registered aircraft, registry code 05601IZ - [Coleman Charles LANCAIR IV P](https://openairdocs.org/model/coleman-charles-lancair-iv-p): 1 registered aircraft, registry code 05601L9 - [Raetech Motorsports LANCAIR IV-P](https://openairdocs.org/model/raetech-motorsports-lancair-iv-p): 1 registered aircraft, registry code 056020J - [Graham Richard A LANCAIR IV-P](https://openairdocs.org/model/graham-richard-a-lancair-iv-p): 1 registered aircraft, registry code 05602CV - [Euzarraga David H LANCAIR IV P](https://openairdocs.org/model/euzarraga-david-h-lancair-iv-p): 1 registered aircraft, registry code 0560382 - [Yoder Jack LANCAIR IVP](https://openairdocs.org/model/yoder-jack-lancair-ivp): 1 registered aircraft, registry code 056039V - [Falcon Helicopter LANCAIR IV-P](https://openairdocs.org/model/falcon-helicopter-lancair-iv-p): 1 registered aircraft, registry code 05603LR - [Zedaker Tom LANCAIR IVP](https://openairdocs.org/model/zedaker-tom-lancair-ivp): 1 registered aircraft, registry code 05603PR - [Patterson M/Fenoglio J/Nelon C LANCAIR IVP](https://openairdocs.org/model/patterson-m-fenoglio-j-nelon-c-lancair-ivp): 1 registered aircraft, registry code 05603Q7 - [Hill George Melvin LANCAIR IV P](https://openairdocs.org/model/hill-george-melvin-lancair-iv-p): 1 registered aircraft, registry code 0560404 - [Hooker William M LANCAIR IV-P](https://openairdocs.org/model/hooker-william-m-lancair-iv-p): 1 registered aircraft, registry code 056041J - [Etzler Richard LANCAIR IV P](https://openairdocs.org/model/etzler-richard-lancair-iv-p): 1 registered aircraft, registry code 056044V --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.