# N503AL: Pelegrin Northwest LANCAIR EVOLUTION - Status: Valid registration - Airframe: [Pelegrin Northwest LANCAIR EVOLUTION](https://openairdocs.org/model/pelegrin-northwest-lancair-evolution) (registry code 0563218, 4 seats) - Engine: [Pratt & Whitney Canada PT6A-28 series](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-28-series) (registry code 52248) - Serial number: EVO-025 - Type: Fixed wing single engine - Engine type: Turbo-prop - Kit: Lancair International Inc LANCAIR EVOLUTION - Airworthiness: Experimental, amateur built - Airworthiness date: December 12, 2013 - Certificate issued: October 27, 2020 - Expires: October 31, 2027 - Mode S code: A64520 - Registered owner: [Pelegrin Northwest LLC](https://openairdocs.org/faa-owner/PELEGRIN%20NORTHWEST%20LLC) - Location: [Bend, OR](https://openairdocs.org/faa-place/OR/Bend) - Owner type: LLC - Owner's area on the map: 44.0022° N, 121.0472° W: Placed by OpenAirDocs at the center of ZIP code 97701, within about 10 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=503AL - Page: https://openairdocs.org/aircraft/N503AL From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. The registry lists only the engine series, so ADs for every Pratt & Whitney Canada PT6A-28 model are included. ## ADs that may apply (OpenAirDocs): 11 in force ### Matched by airframe (Pelegrin Northwest LANCAIR EVOLUTION) None in force. ### Matched by engine (Pratt & Whitney Canada PT6A-28 series) - [AD 2014-11-05](https://openairdocs.org/ad/2014-11-05): Reinforcement liner to the power turbine (PT) containment ring and, for certain PT containment rings, adding scallops · Pratt & Whitney Canada PT6A-11, PT6A-110, PT6A-112 and 18 more. Effective Aug 5, 2014 - [AD 2011-25-12](https://openairdocs.org/ad/2011-25-12): Sun gear · Pratt & Whitney Canada PT6A-15AG, PT6A-27, PT6A-28 and 4 more. Effective Dec 28, 2011 - [AD 2011-20-51](https://openairdocs.org/ad/2011-20-51): Gears · Pratt & Whitney Canada PT6A-15AG, PT6A-27, PT6A-28 and 4 more. Effective Nov 1, 2011 - [AD 2002-23-13](https://openairdocs.org/ad/2002-23-13): Turbine Exhaust Ducts · Pratt & Whitney Canada PT6A-11, PT6A-110, PT6A-112 and 20 more. Effective Dec 31, 2002 - [AD 97-04-12](https://openairdocs.org/ad/97-04-12): Compressor Bleed-off Valve · Pratt & Whitney Canada PT6A-11, PT6A-110, PT6A-112 and 52 more. Effective Mar 14, 1997 - [AD 92-15-11](https://openairdocs.org/ad/92-15-11): Compressor Delivery Air Line (P3) Filter Assembly · Pratt & Whitney Canada PT6A-20, PT6A-20A, PT6A-21 and 7 more. Effective Aug 17, 1992 - [AD 90-12-05](https://openairdocs.org/ad/90-12-05): Engine Overhaul · Pratt & Whitney Canada PT6A-15AG, PT6A-27, PT6A-28 and 3 more. Effective May 30, 1990 - [AD 80-08-12](https://openairdocs.org/ad/80-08-12): Fuel Pump Drive Coupling Splines · Pratt & Whitney Canada PT6A-11, PT6A-112, PT6A-135 and 24 more. Effective Apr 18, 1980 - [AD 75-06-01](https://openairdocs.org/ad/75-06-01): Gearbox Deterioration · Pratt & Whitney Canada PT6A-20, PT6A-20A, PT6A-20B and 11 more. Effective Apr 1, 1977 - [AD 75-11-04](https://openairdocs.org/ad/75-11-04): Reduction Gearbox Engine Distress · Pratt & Whitney Canada PT6A-20, PT6A-20A, PT6A-20B and 8 more. Effective May 20, 1975 - [AD 69-23-06](https://openairdocs.org/ad/69-23-06): Fuel Pumps · Pratt & Whitney Canada PT6A-20, PT6A-27, PT6A-28 and 4 more. Effective Nov 15, 1969 ## Information bulletins (advisory) (1 in force) - [SAIB NE-12-04](https://openairdocs.org/saib/NE-12-04): Turbine/ Turboprop Engine: Reduction Gearbox. Issued Nov 1, 2011 ## NTSB investigations None matched to N503AL. ## FAA accident and incident reports None matched to N503AL. ## Service difficulty reports None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. ## STCs that may be installed (OpenAirDocs) (25) Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do. ### Approved for the engine (Pratt & Whitney Canada PT6A-28 series) - [STC SE000EN](https://openairdocs.org/stc/SE000EN): Engines will be maintained IAW 'Maintenance or Reliable Engines(MORE) Program,' Rev 4, dated 8/16/95. MORE Company Inc - [STC SE10947SC](https://openairdocs.org/stc/SE10947SC): The conversion of the Pratt & Whitney Canada, Model PT6A-21 to a PT6A-28 turboprop engine. Prime Turbines - [STC SE10552SC](https://openairdocs.org/stc/SE10552SC): Conversion of Pratt & Whitney Canada Corp. Model PT6A-27 or -28 to a Model PT6A-34 turboprop engine. Prime Turbines LLC - [STC SE02170AT](https://openairdocs.org/stc/SE02170AT): Installation of Pc Safety Valve Kit. Bell Helicopter Textron Inc - [STC SE02688NY](https://openairdocs.org/stc/SE02688NY): This modification would incorporate improved compressor components into the Pratt & Whitney PT6A-28 engine from the PT6A-135A engine. Standard Aero Limited - [STC SE00014EN](https://openairdocs.org/stc/SE00014EN): Installation of the Pratt & Whitney Engine Services, Inc. CrossCheck Engine Monitor Kit P/N HUMS-K-071-1, Rev. A on the specified PT6A engine models and kit P/N HUMS-K-071-2 on the specified A250 engine models. Pratt & Whitney Engine Services Inc - [STC SE00020EN](https://openairdocs.org/stc/SE00020EN): Installation of the Pratt & Whitney Engine Services, Inc. TrendCheck/ TrendCheck Plus Engine Monitor Kit P/N TREND-K-010-1. Pratt & Whitney Engine Services Inc - [STC SE2960SO](https://openairdocs.org/stc/SE2960SO): Installation of an oil filler cap safety adapter. Jet Avion Corporation - [STC SE02273NY](https://openairdocs.org/stc/SE02273NY): Conversion of a Pratt & Whitney Canada PT6A-27 or PT6A-28 engine to operate as a PT6A-34 engine. Atlantic Turbines International Inc - [STC SE615GL](https://openairdocs.org/stc/SE615GL): Incorporation of a fuel flow transducer. Shadin Avionics - [STC SE01805NY](https://openairdocs.org/stc/SE01805NY): Installation of Fuel Nozzle Adapters using studs and nuts. Atlantic Turbines International Inc - [STC SE00691NY](https://openairdocs.org/stc/SE00691NY): Conversion of engine models PT6A-27 and -28 to Model PT6A-34 as described in Temporary Overhaul Data Revision. Standard Aero Limited - [STC SE09257SC](https://openairdocs.org/stc/SE09257SC): Convert P&W Engine Models PT6A-15AG, -27, and -28, into PT6A-34 configuration. Covington Aircraft Engines, Inc - [STC SE659NE](https://openairdocs.org/stc/SE659NE): Installation of oil tank filler neck check valve, P/N TSA-76A. Aviation Components Support - [STC SE1122EA](https://openairdocs.org/stc/SE1122EA): Repair of combustion chamber small exit duct, P/N 3012060. Airwork Corporation - [STC SE7677SW](https://openairdocs.org/stc/SE7677SW): Modifiy the P&W Canada PT-6A-27, -28, -15AG to the PT6A-34 configuration. Airforce Turbine Service - [STC SE1269EA](https://openairdocs.org/stc/SE1269EA): Stripping and recoating of compressor turbine blades, P/N 3023401, with Walbar Metals, Inc. Airwork Corporation - [STC SE386NE](https://openairdocs.org/stc/SE386NE): Installation of Turbo Products PMA parts. Audco Corporation - [STC SE241NE](https://openairdocs.org/stc/SE241NE): Conversion of engine Models PT6A-27 and -28 to 01/157/3. Airwork Corporation - [STC SE5601SW](https://openairdocs.org/stc/SE5601SW): Replacement splined end and oil mist lubrication on accessory drive gearshaft. Aviall of Texas, Inc - [STC SE79NE](https://openairdocs.org/stc/SE79NE): Conversion to an aircooled compressor turbine vane ring configuration. Airwork Corporation - [STC SE1165EA](https://openairdocs.org/stc/SE1165EA): Assembly and installation of AW10262 wet spline starter gear seal. Airwork Corporation - [STC SE4607SW](https://openairdocs.org/stc/SE4607SW): Revise the starter-generator drive spline to provide lubrication with engine oil. Aviall of Texas, Inc - [STC SE4570SW](https://openairdocs.org/stc/SE4570SW): Revise accessory drive spline, P/N 3008181. Aviall of Texas, Inc - [STC SE12CE](https://openairdocs.org/stc/SE12CE): Installation of Gits Brothers Manufacturing Company dipstick filler cap assembly P/N 02297-2000. Gits Brothers Mfg Co ## Earlier aircraft with N503AL The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N503AL before. - [Cancelled 2004-06-17](https://openairdocs.org/deregistered/N503AL-2004-06-17): Messerschmitt BO105CBS, S/N S-712. Triennial form not returned. Owner: [Air Logistics LLC](https://openairdocs.org/faa-owner/AIR%20LOGISTICS%20LLC), [New Iberia, LA](https://openairdocs.org/faa-place/LA/New%20Iberia) ## Related - Other Pelegrin Northwest LANCAIR EVOLUTION aircraft: https://openairdocs.org/model/pelegrin-northwest-lancair-evolution/aircraft.md - The Pratt & Whitney Canada PT6A-28 series engine: https://openairdocs.org/engine/pratt-whitney-canada-pt6a-28-series.md --- 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.