# Great Lakes 2T-1A-2

- Type: Aircraft model (FAA registry)
- Registry code: 3910101
- Manufacturer (registry): GREAT LAKES
- Model: 2T-1A-2
- Aircraft type: Fixed wing single engine
- Category: Airplane
- Engines: 1 · Reciprocating
- Seats: 2
- Weight class: Up to 12,499 lb
- Cruise speed: 78 mph
- Certification: Type certificated
- Data sheet: [TCDS A18EA](https://openairdocs.org/tcds/A18EA) (OpenAirDocs)
- Holder: WACO Classic Aircraft Corporation
- Registered aircraft: 115
- Page: https://openairdocs.org/model/great-lakes-2t-1a-2

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.

- [AD 2023-26-03](https://openairdocs.org/ad/2023-26-03): Wing, Rib/Bulkhead · WACO Classic 2T-1A-2. Effective Feb 7, 2024
- [AD 2022-03-15](https://openairdocs.org/ad/2022-03-15): Fuel Quantity Indicator · Garmin G3X Touch Electronic Flight Instrument System (STC SA01899WI or SA02658SE). Effective Mar 21, 2022
- [AD 2012-11-08](https://openairdocs.org/ad/2012-11-08): Horizontal Stabilizer Spar/Rib · WACO Classic 2T-1A, 2T-1A-1 and 2T-1A-2. Effective Jun 20, 2012
- [AD 2004-25-22](https://openairdocs.org/ad/2004-25-22): Engine induction system · Great Lakes 2T-1A-1 and 2T-1A-2. Effective Jan 28, 2005
- [AD 78-26-10 R1](https://openairdocs.org/ad/78-26-10-R1): Cockpit Heater System · Great Lakes 2T-1A-1 and 2T-1A-2. Effective Dec 17, 1986
- [AD 80-21-12 R1](https://openairdocs.org/ad/80-21-12-R1): Engine Oil System · Great Lakes 2T-1A-1 and 2T-1A-2. Effective Apr 14, 1983
- [AD 80-25-07 R1](https://openairdocs.org/ad/80-25-07-R1): Oil Coolers · American Champion 7ECA, 7GCAA, 7GCBC and 39 more. Effective Sep 24, 1981

Historical (superseded or no longer in force):

- [AD 79-20-08](https://openairdocs.org/ad/79-20-08) (historical): Induction System · Great Lakes 2T-1A-1 and 2T-1A-2. Effective Oct 8, 1979

## Information bulletins (advisory) (1)

- [SAIB CE-00-36](https://openairdocs.org/saib/CE-00-36): . Issued Sep 15, 2000

## Registered aircraft (115, first 50)

- [N101GL](https://openairdocs.org/aircraft/N101GL): [Associated Aircraft LLC](https://openairdocs.org/faa-owner/ASSOCIATED%20AIRCRAFT%20LLC), [San Diego, CA](https://openairdocs.org/faa-place/CA/San%20Diego), S/N 0714
- [N112PT](https://openairdocs.org/aircraft/N112PT): [Great Lakes Bp LLC](https://openairdocs.org/faa-owner/GREAT%20LAKES%20BP%20LLC), [Cranston, RI](https://openairdocs.org/faa-place/RI/Cranston), S/N 0808
- [N12R](https://openairdocs.org/aircraft/N12R): [Doll John M](https://openairdocs.org/faa-owner/DOLL%20JOHN%20M), [Austin, TX](https://openairdocs.org/faa-place/TX/Austin), built 1976, S/N 0744
- [N14JV](https://openairdocs.org/aircraft/N14JV): [Fullen Ronnie E](https://openairdocs.org/faa-owner/FULLEN%20RONNIE%20E), [Seguin, TX](https://openairdocs.org/faa-place/TX/Seguin), built 1977, S/N 0749
- [N161GL](https://openairdocs.org/aircraft/N161GL): [Edwards Jeffrey L](https://openairdocs.org/faa-owner/EDWARDS%20JEFFREY%20L), [Port Orange, FL](https://openairdocs.org/faa-place/FL/Port%20Orange), built 1978, S/N 0814
- [N16GL](https://openairdocs.org/aircraft/N16GL): [Duncan David](https://openairdocs.org/faa-owner/DUNCAN%20DAVID), [Colorado Springs, CO](https://openairdocs.org/faa-place/CO/Colorado%20Springs), S/N 0772
- [N175HD](https://openairdocs.org/aircraft/N175HD): [Edens Kenneth L](https://openairdocs.org/faa-owner/EDENS%20KENNETH%20L), [Hot Springs, AR](https://openairdocs.org/faa-place/AR/Hot%20Springs), built 1975, S/N 0708
- [N1XG](https://openairdocs.org/aircraft/N1XG): [Class A Coaches LLC](https://openairdocs.org/faa-owner/CLASS%20A%20COACHES%20LLC), [Missoula, MT](https://openairdocs.org/faa-place/MT/Missoula), built 1981, S/N 1001
- [N21XG](https://openairdocs.org/aircraft/N21XG): [Privitt Bret](https://openairdocs.org/faa-owner/PRIVITT%20BRET), [Hudson Oaks, TX](https://openairdocs.org/faa-place/TX/Hudson%20Oaks), built 1982, S/N 1007
- [N22LB](https://openairdocs.org/aircraft/N22LB): [Comchoc Paul R](https://openairdocs.org/faa-owner/COMCHOC%20PAUL%20R), [Bellevue, WA](https://openairdocs.org/faa-place/WA/Bellevue), built 1976, S/N 0730
- [N24C](https://openairdocs.org/aircraft/N24C): [Manganaro Andrew J](https://openairdocs.org/faa-owner/MANGANARO%20ANDREW%20J), [Xenia, OH](https://openairdocs.org/faa-place/OH/Xenia), built 1985, S/N 1011
- [N2XG](https://openairdocs.org/aircraft/N2XG): [Frisch John W III](https://openairdocs.org/faa-owner/FRISCH%20JOHN%20W%20III), [Chicago, IL](https://openairdocs.org/faa-place/IL/Chicago), built 1980, S/N 0830
- [N3502L](https://openairdocs.org/aircraft/N3502L): [Natale William F](https://openairdocs.org/faa-owner/NATALE%20WILLIAM%20F), [Saratoga Springs, NY](https://openairdocs.org/faa-place/NY/Saratoga%20Springs), built 1978, S/N 0792
- [N3511L](https://openairdocs.org/aircraft/N3511L): [Patty Brent A](https://openairdocs.org/faa-owner/PATTY%20BRENT%20A), [El Dorado, KS](https://openairdocs.org/faa-place/KS/El%20Dorado), built 1978, S/N 0793
- [N3513L](https://openairdocs.org/aircraft/N3513L): [Duden Brett R](https://openairdocs.org/faa-owner/DUDEN%20BRETT%20R), [Golden, CO](https://openairdocs.org/faa-place/CO/Golden), built 1978, S/N 0795
- [N3514L](https://openairdocs.org/aircraft/N3514L): [Flying Horseman Ranch LLC](https://openairdocs.org/faa-owner/FLYING%20HORSEMAN%20RANCH%20LLC), [Stuart, VA](https://openairdocs.org/faa-place/VA/Stuart), built 1978, S/N 0796
- [N3515L](https://openairdocs.org/aircraft/N3515L): [Borchers Bruce A](https://openairdocs.org/faa-owner/BORCHERS%20BRUCE%20A), [Scotts Valley, CA](https://openairdocs.org/faa-place/CA/Scotts%20Valley), S/N 0797
- [N3544L](https://openairdocs.org/aircraft/N3544L): [Labounty Dana G](https://openairdocs.org/faa-owner/LABOUNTY%20DANA%20G), [Sumter, SC](https://openairdocs.org/faa-place/SC/Sumter), built 1978, S/N 0800
- [N3554L](https://openairdocs.org/aircraft/N3554L): [Harding Nelson](https://openairdocs.org/faa-owner/HARDING%20NELSON), [Lebanon, OR](https://openairdocs.org/faa-place/OR/Lebanon), built 1978, S/N 0801
- [N3564L](https://openairdocs.org/aircraft/N3564L): [Shepherd William M](https://openairdocs.org/faa-owner/SHEPHERD%20WILLIAM%20M), [Virginia Beach, VA](https://openairdocs.org/faa-place/VA/Virginia%20Beach), built 1978, S/N 0803
- [N3567L](https://openairdocs.org/aircraft/N3567L): [Gordon Robert E Jr](https://openairdocs.org/faa-owner/GORDON%20ROBERT%20E%20JR), [Holly Springs, NC](https://openairdocs.org/faa-place/NC/Holly%20Springs), built 1978, S/N 0805
- [N3587L](https://openairdocs.org/aircraft/N3587L): [Vanatta J Dennis](https://openairdocs.org/faa-owner/VANATTA%20J%20DENNIS), [Faribault, MN](https://openairdocs.org/faa-place/MN/Faribault), built 1978, S/N 0809
- [N3604L](https://openairdocs.org/aircraft/N3604L): [Walker Carol L](https://openairdocs.org/faa-owner/WALKER%20CAROL%20L), [Ennis, TX](https://openairdocs.org/faa-place/TX/Ennis), built 1978, S/N 0812
- [N3604X](https://openairdocs.org/aircraft/N3604X): [Jones Bryan David Kingsley](https://openairdocs.org/faa-owner/JONES%20BRYAN%20DAVID%20KINGSLEY), [San Diego, CA](https://openairdocs.org/faa-place/CA/San%20Diego), built 1977, S/N 0767
- [N3661L](https://openairdocs.org/aircraft/N3661L): [Accomazzo Mark E](https://openairdocs.org/faa-owner/ACCOMAZZO%20MARK%20E), [Charlotte, NC](https://openairdocs.org/faa-place/NC/Charlotte), built 1978, S/N 0816
- [N3665L](https://openairdocs.org/aircraft/N3665L): [Beranek John W](https://openairdocs.org/faa-owner/BERANEK%20JOHN%20W), [Cascade, IA](https://openairdocs.org/faa-place/IA/Cascade), built 1978, S/N 0817
- [N3673L](https://openairdocs.org/aircraft/N3673L): [M&M Shipshape LLC](https://openairdocs.org/faa-owner/M%26M%20SHIPSHAPE%20LLC), [Kalispell, MT](https://openairdocs.org/faa-place/MT/Kalispell), built 1978, S/N 0820
- [N3676L](https://openairdocs.org/aircraft/N3676L): [Geantil Thomas G](https://openairdocs.org/faa-owner/GEANTIL%20THOMAS%20G), [San Diego, CA](https://openairdocs.org/faa-place/CA/San%20Diego), built 1978, S/N 0821
- [N3678L](https://openairdocs.org/aircraft/N3678L): [Aerojet Services Inc](https://openairdocs.org/faa-owner/AEROJET%20SERVICES%20INC), [Aurora, CO](https://openairdocs.org/faa-place/CO/Aurora), built 1978, S/N 0822
- [N3684L](https://openairdocs.org/aircraft/N3684L): [Lucke Eva DBA](https://openairdocs.org/faa-owner/LUCKE%20EVA%20DBA), [Minot, ND](https://openairdocs.org/faa-place/ND/Minot), built 1978, S/N 0819
- [N3702F](https://openairdocs.org/aircraft/N3702F): [Buzjob Aviation LLC](https://openairdocs.org/faa-owner/BUZJOB%20AVIATION%20LLC), [Los Angeles, CA](https://openairdocs.org/faa-place/CA/Los%20Angeles), built 1976, S/N 0739
- [N3703F](https://openairdocs.org/aircraft/N3703F): [Presby Aire LLC](https://openairdocs.org/faa-owner/PRESBY%20AIRE%20LLC), [Berlin, NH](https://openairdocs.org/faa-place/NH/Berlin), built 1976, S/N 0738
- [N3705F](https://openairdocs.org/aircraft/N3705F): [Monteith Andrew W](https://openairdocs.org/faa-owner/MONTEITH%20ANDREW%20W), [Lebanon, PA](https://openairdocs.org/faa-place/PA/Lebanon), built 1977, S/N 0750
- [N371PF](https://openairdocs.org/aircraft/N371PF): [International Air Services Inc Trustee](https://openairdocs.org/faa-owner/INTERNATIONAL%20AIR%20SERVICES%20INC%20TRUSTEE), [Carson City, NV](https://openairdocs.org/faa-place/NV/Carson%20City), built 1976, S/N 0743
- [N3731F](https://openairdocs.org/aircraft/N3731F): [Carder Wiley C](https://openairdocs.org/faa-owner/CARDER%20WILEY%20C), [Cameron Park, CA](https://openairdocs.org/faa-place/CA/Cameron%20Park), built 1976, S/N 0746
- [N3742F](https://openairdocs.org/aircraft/N3742F): [Benson Edward A](https://openairdocs.org/faa-owner/BENSON%20EDWARD%20A), [San Antonio, TX](https://openairdocs.org/faa-place/TX/San%20Antonio), built 1977, S/N 0755
- [N3751F](https://openairdocs.org/aircraft/N3751F): [Adrion Advisors Inc](https://openairdocs.org/faa-owner/ADRION%20ADVISORS%20INC), [Winter Haven, FL](https://openairdocs.org/faa-place/FL/Winter%20Haven), built 1977, S/N 0756
- [N3759F](https://openairdocs.org/aircraft/N3759F): [Coates Joseph M Jr](https://openairdocs.org/faa-owner/COATES%20JOSEPH%20M%20JR), [Tallapoosa, GA](https://openairdocs.org/faa-place/GA/Tallapoosa), built 1977, S/N 0757
- [N3763F](https://openairdocs.org/aircraft/N3763F): [Smith Herbert L](https://openairdocs.org/faa-owner/SMITH%20HERBERT%20L), [Brandon, MS](https://openairdocs.org/faa-place/MS/Brandon), built 1977, S/N 0759
- [N3765F](https://openairdocs.org/aircraft/N3765F): [Salton Robert L](https://openairdocs.org/faa-owner/SALTON%20ROBERT%20L), [Charlotte, NC](https://openairdocs.org/faa-place/NC/Charlotte), built 1977, S/N 0760
- [N3771F](https://openairdocs.org/aircraft/N3771F): [Crane John R](https://openairdocs.org/faa-owner/CRANE%20JOHN%20R), [Niceville, FL](https://openairdocs.org/faa-place/FL/Niceville), S/N 0764
- [N3775F](https://openairdocs.org/aircraft/N3775F): [Hickle William H](https://openairdocs.org/faa-owner/HICKLE%20WILLIAM%20H), [Inyokern, CA](https://openairdocs.org/faa-place/CA/Inyokern), built 1977, S/N 0766
- [N37WR](https://openairdocs.org/aircraft/N37WR): [Still Flying LLC](https://openairdocs.org/faa-owner/STILL%20FLYING%20LLC), [Carlisle, PA](https://openairdocs.org/faa-place/PA/Carlisle), built 1975, S/N 0721
- [N3800F](https://openairdocs.org/aircraft/N3800F): [Campbell Joseph P](https://openairdocs.org/faa-owner/CAMPBELL%20JOSEPH%20P), [Vail, AZ](https://openairdocs.org/faa-place/AZ/Vail), built 1977, S/N 0768
- [N3803F](https://openairdocs.org/aircraft/N3803F): [Piercy Ronald S](https://openairdocs.org/faa-owner/PIERCY%20RONALD%20S), [Moses Lake, WA](https://openairdocs.org/faa-place/WA/Moses%20Lake), built 1977, S/N 0771
- [N3805F](https://openairdocs.org/aircraft/N3805F): [Smith James E Trustee](https://openairdocs.org/faa-owner/SMITH%20JAMES%20E%20TRUSTEE), [Kalispell, MT](https://openairdocs.org/faa-place/MT/Kalispell), built 1977, S/N 0773
- [N3806F](https://openairdocs.org/aircraft/N3806F): [Skytours Aerial LLC](https://openairdocs.org/faa-owner/SKYTOURS%20AERIAL%20LLC), [Jackson, MI](https://openairdocs.org/faa-place/MI/Jackson), built 1977, S/N 0774
- [N3807F](https://openairdocs.org/aircraft/N3807F): [Deno Gerald G](https://openairdocs.org/faa-owner/DENO%20GERALD%20G), [Battle Creek, MI](https://openairdocs.org/faa-place/MI/Battle%20Creek), built 1977, S/N 0775
- [N3808F](https://openairdocs.org/aircraft/N3808F): [Chandler Air Service Inc](https://openairdocs.org/faa-owner/CHANDLER%20AIR%20SERVICE%20INC), [Chandler, AZ](https://openairdocs.org/faa-place/AZ/Chandler), built 1977, S/N 0776
- [N3810F](https://openairdocs.org/aircraft/N3810F): [Tomco Stores Ltd](https://openairdocs.org/faa-owner/TOMCO%20STORES%20LTD), [Ruidoso, NM](https://openairdocs.org/faa-place/NM/Ruidoso), built 1977, S/N 0778

All 115: https://openairdocs.org/model/great-lakes-2t-1a-2/aircraft.md

## NTSB investigations (68, newest 50)

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 GAA24WA280](https://openairdocs.org/ntsb/GAA24WA280), Sep 7, 2024: Great Lakes 2T-1A-2 (N122TL), Gütersloh, Germany, destroyed, 1 fatal
- [NTSB ERA22LA119](https://openairdocs.org/ntsb/ERA22LA119), Feb 11, 2022: Great Lakes 2T-1A-2 (N87G), Naples, FL, minor damage. Probable cause: The biplane pilot’s inadequate visual lookout, which resulted in an on-ground collision with another airplane while taxiing.
- [NTSB WPR20LA320](https://openairdocs.org/ntsb/WPR20LA320), Sep 24, 2020: Great Lakes 2T1A (N3617L), San Diego, CA, substantial damage. Probable cause: A loss of engine power for reasons that could not be determined, which resulted in a hard landing off airport.
- [NTSB WPR19LA114](https://openairdocs.org/ntsb/WPR19LA114), Mar 15, 2019: Great Lakes 2T-1A-2 (N101GL), San Diego, CA, substantial damage. Probable cause: The fracture of the aileron hinge strap due to fatigue crack propagation, which resulted in substantial damage to a wing rib aft of the spar at the outboard aileron cutout. Contributing to the…
- [NTSB GAA18CA319](https://openairdocs.org/ntsb/GAA18CA319), Jun 3, 2018: Great Lakes 2T1A (N5762B), San Diego, CA, no damage. Probable cause: The biplane pilot’s failure to see and avoid the stopped airplane.
- [NTSB ERA18LA023](https://openairdocs.org/ntsb/ERA18LA023), Nov 2, 2017: Great Lakes 2T1A (N3512L), Montague, MA, substantial damage. Probable cause: The pilot’s failure to maintain directional control during the attempted takeoff, which resulted in a runway excursion.
- [NTSB GAA17CA125](https://openairdocs.org/ntsb/GAA17CA125), Jan 28, 2017: Great Lakes 2T1A (N16GL), Canon City, CO, substantial damage. Probable cause: The pilot’s failure to maintain directional control during the landing roll. Contributing to the accident was the pilot’s unstabilized approach.
- [NTSB GAA16CA510](https://openairdocs.org/ntsb/GAA16CA510), Sep 16, 2016: Great Lakes 2T1A (N3771F), Port St. Lucie, FL, substantial damage. Probable cause: The pilot's failure to avoid the drainage pipe during the landing roll on a private grass airstrip. Contributing to the accident was the pilot's reduced forward view from the rear seat.
- [NTSB CEN14CA428](https://openairdocs.org/ntsb/CEN14CA428), Aug 3, 2014: Great Lakes 2T 1A 2 (N80AM), Frankfort, MI, substantial damage. Probable cause: The pilot's improper recovery from a bounced landing in gusty, crosswind conditions. Contributing to the accident was the pilot lack of recent tail wheel landing experience.
- [NTSB CEN13CA522](https://openairdocs.org/ntsb/CEN13CA522), Aug 25, 2013: Great Lakes 2T-1A-2 (N5761Z), Iowa City, IA, substantial damage. Probable cause: The pilot failed to maintain directional control of the airplane while landing.
- [NTSB WPR12LA409](https://openairdocs.org/ntsb/WPR12LA409), Sep 8, 2012: Great Lakes 2T-1A-2 (N3702F), Monroe, WA, substantial damage. Probable cause: A loss of engine power during cruise flight for reasons that could not be determined because postaccident examination did not reveal any anomalies that would have precluded normal operation.
- [NTSB CEN11LA209](https://openairdocs.org/ntsb/CEN11LA209), Feb 26, 2011: Great Lakes 2T-1A-2 (N6196L), Kingsville, TX, substantial damage. Probable cause: A pre-existing crack in the front spar of the right horizontal stabilizer near a riveted fitting, causing it to fail and separate from the airplane in flight. Contributing to the accident was the…
- [NTSB WPR10CA282](https://openairdocs.org/ntsb/WPR10CA282), May 31, 2010: Great Lakes 2T-1A-2 (N6075L), Chandler, AZ, substantial damage. Probable cause: The pilot’s failure to maintain directional control and the flight instructor's inadequate remedial action during the landing roll, which resulted in a ground loop.
- [NTSB CEN09CA349](https://openairdocs.org/ntsb/CEN09CA349), Jun 7, 2009: Great Lakes 2T-1A-2 (N3812F), Hamilton, TX, substantial damage. Probable cause: The pilot's failure to maintain clearance from a tree while on short final.
- [NTSB LAX05LA173](https://openairdocs.org/ntsb/LAX05LA173), May 14, 2005: Great Lakes 2T-1A-2 (N765GL), Sonoma, CA, substantial damage. Probable cause: a partial loss of engine power, which resulted from the fuel servo leaking and generating an excessively rich fuel/air mixture. A factor was the owner's failure to comply with a service bulletin.
- [NTSB IAD04LA043](https://openairdocs.org/ntsb/IAD04LA043), Aug 22, 2004: Great Lakes 2T1-A2 (N1XG), Elkton, KY, substantial damage. Probable cause: The pilot's misidentification of the runway, which resulted in the airplane striking an obscured runway marker. Factors were the tailwheel airplane's reduced forward and lateral visibility during…
- [NTSB SEA03LA141](https://openairdocs.org/ntsb/SEA03LA141), Jul 17, 2003: Great Lakes 2T-1A-2 (N16GL), Newman Lake, WA, substantial damage. Probable cause: The pilot's failure to maintain clearance from an object while on final approach for landing. Trees and inadequate visual lookout were factors.
- [NTSB CHI98LA157](https://openairdocs.org/ntsb/CHI98LA157), May 17, 1998: Great Lakes 2T-1A-2 (N3803F), Tower, MN, substantial damage. Probable cause: the pilot's inadequate preflight of the airplane's fuel system, and fuel exhaustion, which resulted in a loss of engine power, due to an inadequate supply of fuel.
- [NTSB MIA98LA108](https://openairdocs.org/ntsb/MIA98LA108), Mar 25, 1998: Great Lakes 2T-1A-2 (N3751F), Pierson, FL, substantial damage. Probable cause: the pilot's failure to note the windsock before touchdown which resulted in a downwind landing, and the pilot's improper elevator control. Factors were the tailwind and the pilot's complacency.
- [NTSB ATL96LA120](https://openairdocs.org/ntsb/ATL96LA120), Aug 17, 1996: Great Lakes GL2T-1A-2 (N47L), Montgomery, AL, substantial damage. Probable cause: The locked rudder in a fully deflected position which resulted in the pilot's inability to maintain directional control.
- [NTSB LAX96FA075](https://openairdocs.org/ntsb/LAX96FA075), Dec 19, 1995: Great Lakes 2T-1A-2 (N3511L), Fillmore, CA, destroyed. Probable cause: failure of the pilot to take proper remedial action to recover from an intentional spin.
- [NTSB LAX96LA023](https://openairdocs.org/ntsb/LAX96LA023), Oct 26, 1995: Great Lakes 2T-1A-2 (N3808F), Chandler, AZ, substantial damage. Probable cause: the improper installation of an intake manifold tube assembly during engine overhaul which permitted leakage into the induction system resulting in detonation and piston failure in the associated…
- [NTSB FTW95LA381](https://openairdocs.org/ntsb/FTW95LA381), Sep 4, 1995: Great Lakes 2T-1A-2 (N5761G), Boulder, CO, substantial damage. Probable cause: FAILURE BY THE PILOT TO MAINTAIN CONTROL OF THE AIRCRAFT DURING LANDING ROLL.
- [NTSB NYC95LA194](https://openairdocs.org/ntsb/NYC95LA194), Aug 16, 1995: Great Lakes 2T1-A2 (N49CR), Fombell, PA, destroyed, 2 fatal. Probable cause: the loss of engine power for undetermined reasons, and the pilot's failure to maintain airspeed.
- [NTSB CHI95LA010](https://openairdocs.org/ntsb/CHI95LA010), Oct 10, 1994: Great Lakes 2T-1A-2 (N933EB), Mt. Horeb, WI, substantial damage. Probable cause: the pilot's excessive braking while taxiing from landing.
- [NTSB NYC90LA022](https://openairdocs.org/ntsb/NYC90LA022), Oct 28, 1989: Great Lakes 2T-1A-2 (N771VY), Pittstown, NJ, substantial damage. Probable cause: THE PILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL DURING LANDING.
- [NTSB LAX89LA174](https://openairdocs.org/ntsb/LAX89LA174), Apr 29, 1989: Great Lakes 2T-1A-2 (N6220L), Ramona, CA, minor damage. Probable cause: THE PILOT OF THE OTHER AIRCRAFT DID NOT MAINTAIN AN ADEQUATE VISUAL LOOKOUT AND COLLIDED WITH THIS CESSNA THAT WAS PARKED IN THE RUNUP AREA.
- [NTSB MKC88LA090](https://openairdocs.org/ntsb/MKC88LA090), May 17, 1988: Great Lakes 2T1A2 (N3502L), Horton, KS, substantial damage
- [NTSB FTW87LA154](https://openairdocs.org/ntsb/FTW87LA154), Jun 26, 1987: Great Lakes 2T-1A-2 (N3564L), Baytown, TX, substantial damage
- [NTSB LAX87LA211](https://openairdocs.org/ntsb/LAX87LA211), May 17, 1987: Great Lakes 2T-1A-2 (N5762G), Tucson, AZ, substantial damage
- [NTSB SEA86LA247](https://openairdocs.org/ntsb/SEA86LA247), Sep 18, 1986: Great Lakes 2T-1A-2 (N3565L), Tillamook, OR, substantial damage
- [NTSB LAX86LA340](https://openairdocs.org/ntsb/LAX86LA340), Aug 31, 1986: Great Lakes 2T-1A-2 (N10SV), Santa Paula, CA, destroyed
- [NTSB FTW86FA156](https://openairdocs.org/ntsb/FTW86FA156), Aug 30, 1986: Great Lakes 2T-1A-2 (N6198L), Houston, TX, destroyed, 1 fatal
- [NTSB FTW85LA345](https://openairdocs.org/ntsb/FTW85LA345), Sep 9, 1985: Great Lakes 2T-1A-2 (N6262L), Caddo Mills, TX, destroyed
- [NTSB LAX85LA295](https://openairdocs.org/ntsb/LAX85LA295), Jun 22, 1985: Great Lakes 2T-1A-2 (N3800F), Angwin, CA, substantial damage
- [NTSB SEA85LA141](https://openairdocs.org/ntsb/SEA85LA141), Jun 16, 1985: Great Lakes 2T-1A-2 (N44SJ), North Plains, OR, substantial damage
- [NTSB MIA85LA062](https://openairdocs.org/ntsb/MIA85LA062), Dec 23, 1984: Great Lakes 2T-1A-2 (N14JV), Naples, FL, substantial damage
- [NTSB LAX84LA468](https://openairdocs.org/ntsb/LAX84LA468), Sep 4, 1984: Great Lakes 2T-1A-2 (N3673L), Van Nuys, CA, substantial damage
- [NTSB CHI83LA388](https://openairdocs.org/ntsb/CHI83LA388), Aug 20, 1983: Great Lakes 2T-1A-2 (N2XG), Bloomington, IL, substantial damage
- [NTSB MIA83LA172](https://openairdocs.org/ntsb/MIA83LA172), Jun 18, 1983: Great Lakes 2T-1A-2 (N3705F), St. Augustine, FL, substantial damage
- [NTSB LAX82FA361](https://openairdocs.org/ntsb/LAX82FA361), Sep 26, 1982: Great Lakes 2T-1A-2 (N353GL), Arcata, CA, destroyed, 1 fatal
- [NTSB FTW82DPA06](https://openairdocs.org/ntsb/FTW82DPA06), Nov 18, 1981: Great Lakes 2T-TA (N101GL), Waco, TX, substantial damage
- [NTSB ATL82FKM02](https://openairdocs.org/ntsb/ATL82FKM02), Oct 11, 1981: GR Lakes 2T-1A2 (N4008L), Pinnacle, NC, substantial damage
- [NTSB FTW81FA115](https://openairdocs.org/ntsb/FTW81FA115), Jul 4, 1981: Great Lakes 2T-1A2 (N3820F), Jacktown, OK, destroyed, 1 fatal
- [NTSB MKC81DCG43](https://openairdocs.org/ntsb/MKC81DCG43), Jul 3, 1981: Great Lakes 2T-1A (N3816F), Pleasant Hill, MO, substantial damage
- [NTSB FTW81FRG26](https://openairdocs.org/ntsb/FTW81FRG26), Mar 13, 1981: Great Lakes 2T-1A2 (N6053L), Alamo, TX, substantial damage
- [NTSB MKC81DCG23](https://openairdocs.org/ntsb/MKC81DCG23), Feb 25, 1981: Great Lakes 2T-1A (N3544L), Grain Valley, MO, substantial damage
- [NTSB LAX80FUG03](https://openairdocs.org/ntsb/LAX80FUG03-201196), Oct 25, 1979: Great Lakes 2T-1A (N3805F), Elsinore, CA, substantial damage
- [NTSB FTW79DPG82](https://openairdocs.org/ntsb/FTW79DPG82), Sep 8, 1979: Great Lakes 2T-1A (N3703F), Alpin, AR, substantial damage
- [NTSB IAD79FLQ21](https://openairdocs.org/ntsb/IAD79FLQ21), Jul 21, 1979: Great Lakes 2T-1A (N3716F), Versailles, KY, destroyed, 2 fatal

All 68: https://openairdocs.org/model/great-lakes-2t-1a-2/ntsb.md

## FAA accident and incident reports (138, newest 50)

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.

- [Incident 20260713008959I](https://openairdocs.org/incident/20260713008959I), Jul 13, 2026: Great Lakes 2T-1A-2 (N5762B), San Diego, CA, Minor damage. On 07/13/2026 after landing at kmyf, [privacy data omitted], Great Lakes 2T-1A-2, the second aircraft on a flight of 2, while taxing back to parking in…
- [Incident 20260713008949I](https://openairdocs.org/incident/20260713008949I), Jul 13, 2026: Great Lakes 2T-1A-2 (N101GL), San Diego, CA, Minor damage. On 07/13/2026, [privacy data omitted], Great Lakes 2T-1A-2, the lead aircraft on a flight of 2 while taxing back to parking after landing at kmyf applied…
- [Incident 20250919015329I](https://openairdocs.org/incident/20250919015329I), Sep 19, 2025: Great Lakes 2T-1A-2 (N3678L), Janesville, WI, Minor damage. While taxiing for departure to runway 14 at jvl, aircraft made a sudden hard braking on taxiway. Aircraft tilted forward and the propeller struck the taxiway…
- [Incident 20250801011169I](https://openairdocs.org/incident/20250801011169I), Aug 1, 2025: Great Lakes 2T-1A-2 (N6199L), New Symrna, FL, Minor damage. The pilot was conducting touch and go landings with the [privacy data omitted]. On the second landing the aircraft ground looped off runway 25 into grass and…
- [Accident 20220211001992A](https://openairdocs.org/incident/20220211001992A), Feb 11, 2022: Great Lakes 2T-1A-2 (N87G), Naples, FL, Minor damage. Both aircraft - Great Lakes N87G and Mooney c-foxv - were at the Departure end of the active runway of rwy 23 on taxiway a. N87G was in The run up area on the…
- [Accident 20200924016769A](https://openairdocs.org/incident/20200924016769A), Sep 24, 2020: Great Lakes 2T-1A-2 (N3617L), San Diego, CA, Substantial damage. Instructor and student, receiving tailwheel instruction, took off from myf airport on runway 28R. Instructor stated shortly after takeoff aircraft lost power,…
- [Incident 20200618005959I](https://openairdocs.org/incident/20200618005959I), Jun 18, 2020: Great Lakes 2T-1A-2 (N3617L), San Diego, CA, Minor damage. On June 18, 2020 at kmyf airport approximately 13:45, N3617L nosed over on the ramp after start up. The propeller made contact with the ground. Minor damage to…
- [Incident 20190728012869I](https://openairdocs.org/incident/20190728012869I), Jul 28, 2019: Great Lakes 2T-1A-2 (N791BK), Midland, VA, Minor damage. The pilot was conducting a full stop landing after completing a routine flight. Weather was VFR and pilot stated winds were oriented 50-60 degrees from the…
- [Accident 20190314001459A](https://openairdocs.org/incident/20190314001459A), Mar 14, 2019: Great Lakes 2T-1A-2 (N101GL), San Diego, CA, Minor damage. This is a biplane type aircraft. The ailerons are held in place by metal straps. There are two straps for each top aileron. Ten minutes into the flight the…
- [Incident 20180610007529I](https://openairdocs.org/incident/20180610007529I), Jun 10, 2018: Great Lakes 2T-1A-2 (N3617L), San Diego, CA, Minor damage. On landing rollout, the PIC experienced a shimmy in the tailwheel and took corrective action. The shimmy returned and in an attempt to regain control of the…
- [Accident 20180603007022A](https://openairdocs.org/incident/20180603007022A), Jun 3, 2018: Great Lakes 2T-1A-2 (N5762B), San Diego, CA, Minor damage. N5762B was the second aircraft in a flight of three biplanes. The flight was parked in the run-up area adjacent to the taxiway at runway 28R, awaiting takeoff…
- [Accident 20171102018139A](https://openairdocs.org/incident/20171102018139A), Nov 2, 2017: Great Lakes 2T-1A-2 (N3512L), Montague, MA, Substantial damage. On November 1, 2017. At approximately 2:30 pm, aircraft N3512L (Great Lakes model 2T-1A-2) was involved in an accident at the Turners Falls Airport (0B5)…
- [Incident 20170330002889I](https://openairdocs.org/incident/20170330002889I), Mar 30, 2017: Great Lakes 2T-1A-2 (N101GL), San Diego, CA, Minor damage. CFI report--when cleared for takeoff, I handled the radio?s but gave the controls to logan. He taxied out very well, he had a lot of experience in tail wheel…
- [Accident 20170128002339A](https://openairdocs.org/incident/20170128002339A), Jan 28, 2017: Great Lakes 2T-1A-2 (N16GL), Canon City, CO, Substantial damage. Upon returning to base airport at fremont county airport , the pilot and passenger of N16GL tuned and listened to the AWOS weather briefing provided by 1V6,…
- [Incident 20161228019469I](https://openairdocs.org/incident/20161228019469I), Dec 28, 2016: Great Lakes 2T-1A-2 (N3604L), Midlothian, TX, Minor damage. On December 28, 2016 at approximately 1440 central daylight time (CDT), a Great Lakes 2T-1A-2, N3604L, was involved in an incident while landing, during…
- [Incident 20161104021349I](https://openairdocs.org/incident/20161104021349I), Nov 4, 2016: Great Lakes 2T-1A-2 (N22LB), Arlington, WA, Minor damage. At post landing rollout, airman attempted to clear the active runway 34 in a right turn to taxi way A-2. After initiating the turn with rudder pedal, the…
- [Incident 20161012022029I](https://openairdocs.org/incident/20161012022029I), Oct 12, 2016: Great Lakes 2T-1A-2 (N6220L), Santa Ana, CA, Minor damage. At ksna on October 12, 2016 roughly around 21:45:54 z, N6620L was cleared to line up and wait on 20R at taxi way kilo. While taxing into position the tail…
- [Accident 20160916015659A](https://openairdocs.org/incident/20160916015659A), Sep 16, 2016: Great Lakes 2T-1A-2 (N3771F), Port St. Lucie, FL, Substantial damage. On September 16, 2016, about 1935 eastern daylight time, a Great Lakes 2T-1A-2, two place tandem bi-plane with a standard category certificate, N3771F,…
- [Incident 20160213002849I](https://openairdocs.org/incident/20160213002849I), Feb 13, 2016: Great Lakes 2T-1A-2 (N763GL), Palo Alto, CA, Minor damage. On February 13, 2016, N763GL, a Great Lakes model 2T-1A-2 landed at Palo Alto airport. On landing rollout the pilot stated that the aircraft started to veer…
- [Incident 20140809015539I](https://openairdocs.org/incident/20140809015539I), Aug 9, 2014: Great Lakes 2T-1A-2 (N3702F), Pacoima, CA, Minor damage. The pilot of N3702 made a 3 point landing on runway 12, during roll out the tower asked the pilot of N3702 if he could make the next exit (cheerly). The…
- [Accident 20140803013149A](https://openairdocs.org/incident/20140803013149A), Aug 3, 2014: Great Lakes 2T-1A-2 (N80AM), Frankfort, MI, Substantial damage. On August 3, 2014 at 1330 EST, a Great Lakes 2T-1A-2 biplane N80AM, registered to owner irish express LLC. Crashed on landing on runway 33 Frankfort (fks)…
- [Incident 20140720013189I](https://openairdocs.org/incident/20140720013189I), Jul 20, 2014: Great Lakes 2T-1A-2 (N3806F), Ann Arbor, MI, Minor damage. The student pilot was receiving flight instruction. The aircraft landed runway 12 (grass) at arb. Requested taxi to runway 30 (pavement) for pattern work. They…
- [Incident 20130928021849I](https://openairdocs.org/incident/20130928021849I), Sep 28, 2013: Great Lakes 2T-1A-2 (N3564L), Tampa, FL, No damage. Pilot had a jacksonville sectional and a tpa terminal charts onboard. He was using pilotage and GPS for navigation. He was flying over a broken undercast. The…
- [Accident 20120908019359A](https://openairdocs.org/incident/20120908019359A), Sep 8, 2012: Great Lakes 2T-1A-2 (N3702F), Monroe, WA, Substantial damage. After engine failure force landed in soft field aircraft rolled onto back as it slowed.
- [Incident 20120212001629I](https://openairdocs.org/incident/20120212001629I), Feb 12, 2012: Great Lakes 2T-1A-2 (N6075L), Chandler, AZ, Minor damage. N6075L, with a CFI and student under part 91 and 61, were performing touch and go landings on runway 22R at Chandler municipal airport. On the rollout for the…
- [Incident 20111027029219I](https://openairdocs.org/incident/20111027029219I), Oct 27, 2011: Great Lakes 2T-1A-2 (N6075L), Chandler, AZ, Minor damage. On 10/27/2011 [privacy data omitted] while conducting an instructional flight and acting as pilot in command of a Great Lakes bi-plane, registration number…
- [Incident 20110526012889I](https://openairdocs.org/incident/20110526012889I), May 26, 2011: Great Lakes 2T-1A-2 (N3587L), Livermore, CA, Minor damage. On 05/26/2011, at approx 13:30, aircraft N3587L landed at the Livermore Airport on runway 25R without the tailwheel assembly. No injuries to occupants. Minor…
- [Accident 20110227002909A](https://openairdocs.org/incident/20110227002909A), Feb 27, 2011: Great Lakes 2T-1A-2 (N6196L), Kingsville, TX, Minor damage. After takeoff. At 2,000 ft, aircraft started to vibrate. Pilot returned to airport and found the right horizontal stabilizer missing from aircraft.
- [Accident 20100531005549A](https://openairdocs.org/incident/20100531005549A), May 31, 2010: Great Lakes 2T-1A-2 (N6075L), Chandler, AZ, Minor damage. 05/31/10 At approximately 09:45 MST at the Chandler airport kchd, a grklks-2T1-A2, piloted by [privacy data omitted] did ground loop while landing, causing…
- [Accident 20090607007859A](https://openairdocs.org/incident/20090607007859A), Jun 7, 2009: Grtlks 2T1A2 (N3812F), Hamilton, TX, Substantial damage. (-23) Pilot became lost. Pilot decided to land and ask his location. On short final approach pilot hit a tree with left main landing gear. Airspeed decayed so…
- [Incident 20090418009439I](https://openairdocs.org/incident/20090418009439I), Apr 18, 2009: Grtlks 2T1A2 (N3587L), Livermore, CA, Minor damage. (-23) Upon landing at lvk, 25L, touching down on all three wheels and the engine at idle, the pilot passed the second taxiway, attempted to get off the heel…
- [Incident 20070610013539I](https://openairdocs.org/incident/20070610013539I), Jun 10, 2007: Grtlks 2T1A2 (N6016L), Longmont, CO, Minor damage. (-23) The pilot stated that during run up at 1750 rpms the aircraft tipped on its nose. Damage was done to the prop. No injuries to the pilot.
- [Incident 20060105000959I](https://openairdocs.org/incident/20060105000959I), Jan 5, 2006: Grtlks 2T1A2 (N3808F), Chandler, AZ, Minor damage. (-23) On January 5, 2006, at approximately 17:40 MST, the pilot in command of N3808F returned to the chd airport after completing an aerobatic flight with a…
- [Incident 20050516009909I](https://openairdocs.org/incident/20050516009909I), May 16, 2005: Grtlks 2T1A2 (N6054L), Blairstown, NJ, Minor damage. (-23) During landing on grass portion of runway 25 at the Blairstown Airport (1N7) in Blairstown, NJ, the pilot stated he struck a lip on a paved taxiway that…
- [Accident 20050514010969A](https://openairdocs.org/incident/20050514010969A), May 14, 2005: Grtlks 2T1A2 (N765GL), Schellville/Son, CA, Substantial damage. (-23) Pilot lost control of the aircraft on take off after loss of engine power at about 40 feet (AGL).
- [Incident 20050412004849I](https://openairdocs.org/incident/20050412004849I), Apr 12, 2005: Grtlks 2T1A2 (N3601L), Santa Rosa, CA, Minor damage. (-23) Pilot reported during landing "roll out" that his tail was on the ground, aircraft speed less than 30 knots, when he experienced gusty cross wind…
- [Incident 20050406006999I](https://openairdocs.org/incident/20050406006999I), Apr 6, 2005: Grtlks 2T1A2 (N3810F), Chandler, AZ, Minor damage. (-23) Pilot states he was taxiing to parking after an uneventful landing when the left brake locked up. The aircraft nosed over resulting in damage to the…
- [Accident 20040822021239A](https://openairdocs.org/incident/20040822021239A), Aug 22, 2004: Grtlks 2T1A2 (N1XG), Elkton, KY, Substantial damage. (-23) Pilot reported aircraft accident to FSDO at approximately 10:20 on 08/23/2004. Pilot, owner Mr. Gary jones stated the following during a phone call to…
- [Incident 20040301002599I](https://openairdocs.org/incident/20040301002599I), Mar 1, 2004: Grtlks 2T1A2 (N6247L), Chandler, AZ, Minor damage. (-23) Aircraft returning from local flight, upon landing at Chandler airport, Chandler, Arizona pilot attempted to turn off runway on to November 2 taxiway.…
- [Incident 20030920029109I](https://openairdocs.org/incident/20030920029109I), Sep 20, 2003: Grtlks 2T1A2 (N99GL), Lakeport, CA, Minor damage. (-23) During landing roll out, pilot lost control of aircraft and ground looped. Aircraft sustained minor damage to the propeller, wing tip and landing gear.…
- [Accident 20030716015779A](https://openairdocs.org/incident/20030716015779A), Jul 16, 2003: Grtlks 2T1A2 (N16GL), Newman Lake, WA, Substantial damage. (-23) At approximately 2015 PDT, the aircraft was conducting a long final approach for runway 19 at the Ellerport Airport (WN54). The runway is 2600 feet long…
- [Incident 20030515017319I](https://openairdocs.org/incident/20030515017319I), May 15, 2003: Grtlks 2T1A2 (N87G), Culpeper, VA, Minor damage. (-23) Aircraft flipped inverted after landing, minor damage, no injuries.
- [Incident 20001001030479I](https://openairdocs.org/incident/20001001030479I), Oct 1, 2000: Grtlks 2T1A2 (N44SJ), Burbank, CA, Minor damage. (-23)A/c was given instructions to taxi to runway eight. When it became apparent he was headed onto the runway, he was told to hold position. His stop was so…
- [Incident 19990528016049I](https://openairdocs.org/incident/19990528016049I), May 28, 1999: Grtlks 2T1A2 (N3554L), Decatur, IL, Minor damage. At about 1725 CDT the pilot on command was making a runup on the taxiway leading to runway 24, prior to a local pleasure flight. After checking the magnetos…
- [Incident 19990111005819I](https://openairdocs.org/incident/19990111005819I), Jan 11, 1999: Grtlks 2T1A2 (N6075L), Chandler, AZ, Minor damage. (-5) We took off around 8:15 local on an instructional flight in great-lakes N6075L. My student is a relatively high time pilot, but did not have any tailwheel…
- [Incident 19980625023419I](https://openairdocs.org/incident/19980625023419I), Jun 25, 1998: Grtlks 2T1A2 (N3502L), Overbrook, KS. Rough engine enroute. Tried for pamona KS. Unable landed in cornfield.
- [Accident 19980517016019A](https://openairdocs.org/incident/19980517016019A), May 17, 1998: Grtlks 2T1A2 (N3803F), Tower, MN, Substantial damage. (.4)The pilot said that after takeoff, the airplane was in a climb at about 2,000 feet AGL and 3 miles north of the airport when he began a turn to the east.…
- [Accident 19980325004269A](https://openairdocs.org/incident/19980325004269A), Mar 25, 1998: Grtlks 2T1A2 (N3751F), Pierson, FL, Substantial damage. Flight of 4 aircraft 3 landed rwy 23 this one nosed over when brakes applied landing. Tailwind complacent factors. (-23) pilot landed downwind on 2600' grass…
- [Incident 19970526018049I](https://openairdocs.org/incident/19970526018049I), May 26, 1997: Grtlks 2T1A2 (N14JV), Gulfport, MS, Minor damage. Narrative: N14JV, great lakes 2T1-A2, taxiing on ramp hit a parked unmanned R22 beta, N8004F.
- [Accident 19960817023109A](https://openairdocs.org/incident/19960817023109A), Aug 17, 1996: Grtlks 2T1A2 (N47L), Montgomery, AL, Substantial damage. Veered left on takeoff roll. Exited runway. Nosed over. Tailwheel locked in full left position.

All 138: https://openairdocs.org/model/great-lakes-2t-1a-2/incidents.md

## Service difficulty reports (6)

As reported by operators and repair stations, by the model named in the report.

- [SDR 2022FA0000490](https://openairdocs.org/sdr/2022FA0000490), Aug 31, 2022: RIB. CRACKED. DURING INSPECTION/MAINTENANCE OF A GREAT LAKES 2T-1A-2 FUEL TANK, MANUFACTURED BY WACO, IT WAS NOTICED THAT THE FOUR FORE (PN 61157-2) AND TWO AFT (60447) RIBS 
- [SDR 2012FA0000252](https://openairdocs.org/sdr/2012FA0000252), May 2, 2012: SPAR. CRACKED. INSPECTED ACFT IAW SB-GL12-01R. AFTER REMOVING THE RT HORIZONTAL STABILIZER, A CRACK WAS DISCOVERED ALONG THE INBD RIVET LINE WHICH COVERED APPROX 70 DEGREES OF
- [SDR 2003FA0000521](https://openairdocs.org/sdr/2003FA0000521), Mar 28, 2003: FILTER. DAMAGED. UPON INSTALL, OIL FILTER SCREEN WAS REMOVED TO DRAIN OIL, WAS FOUND, INSTALLED IMPROPER, WAS CRUSHED ON ONE END. OIL FILTER BASE ASSY WAS REMOVED TO AID IN INST
- [SDR 99ZZZX3492](https://openairdocs.org/sdr/99ZZZX3492), Aug 1, 1999: SPAR. CRACKED. WHEN REMOVING STABILIZER BRACE WIRES AND FINE BRACE WIRES, THE HORIZONTAL STABILIZER SPARS WERE FOUND CRACKED AT THE INTERCONNECT FITTINGS. THERE IS NO REQUIREM
- [SDR 98ZZZX3418](https://openairdocs.org/sdr/98ZZZX3418), Aug 31, 1998: CABLES. WORN. DUIRNG INSPECTION, FOUND UPPER ELEVATOR CABLE HAD 2 OR 3 BROKEN STANDS WHERE THE CABLE RUBBED A FAIRLEAD IN THE AFT FUELAGE. UPON REPLACEMENT OF THE CABLE, A MU
- [SDR 97ZZZX3480](https://openairdocs.org/sdr/97ZZZX3480), Jul 11, 1997: OIL PUMP. DEFECTIVE. DURING AD RESEARCH, AD 96-09-10, ENGINE WAS SUBJECT TO VERIFICATION. ENGINE MANUFACTURED (FIRST TEST FLIGHT) OCTOBER, 1978, AND HAS 330 HOURS TOTAL TIME SINCE N

## STCs that may be installed (OpenAirDocs) (49)

Approved for this model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has.

- [STC SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels LLC
- [STC SA02636SE](https://openairdocs.org/stc/SA02636SE): Installation of Garmin GPS 175 Navigation System and GNX 375 Navigation System with ADS-B In/Out Transponder. Garmin International Inc
- [STC SA02019SE-D](https://openairdocs.org/stc/SA02019SE-D): Installation of Garmin Model GTN 625/635/650; 725/750 Navigation System. Garmin International Inc
- [STC SA04046CH PAGE 2](https://openairdocs.org/stc/SA04046CH%20PAGE%202): Installation of L-3 GENESIS (TM) Electronic Standby Instrument System (ESI-500/MAG-500). Acron Aviation Inc
- [STC SA7965SW](https://openairdocs.org/stc/SA7965SW): Application of fabric and polyurethane finishing system. Shady Aviation LLC
- [STC SA04378CH](https://openairdocs.org/stc/SA04378CH): Installation of an engine modified per STC SE04349CH. SureFly Partners Ltd
- [STC SA02594SE](https://openairdocs.org/stc/SA02594SE): SkyView HDX Instrumentation and Autopilot System manufactured. Dynon Avionics
- [STC SA01757WI](https://openairdocs.org/stc/SA01757WI): To allow the use of UL91 or UL94 (minimum) grade aviation fuel. Swift Fuels LLC
- [STC SA02658SE](https://openairdocs.org/stc/SA02658SE): Installation of Garmin GI 275 Multi-Function Display System. Garmin International Inc
- [STC SA01967WI](https://openairdocs.org/stc/SA01967WI): Use of GAMI G100UL High Octane Unleaded Avgas. General Aviation Modifications Inc
- [STC SA04776NY](https://openairdocs.org/stc/SA04776NY): The HIPEC Covering and Finishing System must be performed and maintained. HIPEC Aircraft Coatings Inc
- [STC SA02444AK](https://openairdocs.org/stc/SA02444AK): Approval of the L-3 Communications NGT 9000/9000R ADS-B system installed. ADS-B Technologies LLC
- [STC SA03819NY](https://openairdocs.org/stc/SA03819NY): Installation and maintenance of Oratex 6000 Covering and Coating System. Lanitz-Prena Folien Factory GmbH
- [STC SA01818WI](https://openairdocs.org/stc/SA01818WI): Installation of Garmin G5 Electronic Flight Instrument. Garmin International Inc
- [STC SA00401BO](https://openairdocs.org/stc/SA00401BO): Installation of a SkyTrax100B UAT receiver. Avidyne Corporation
- [STC SA2368CE](https://openairdocs.org/stc/SA2368CE): Installation of plywood covering on the bottom of the wing center section. Great Lakes Aircraft Company LLC
- [STC SA00410BO](https://openairdocs.org/stc/SA00410BO): Installation of an AV-30-C Multi-Mode Indicator. uAvionix Corporation
- [STC SA01831WI](https://openairdocs.org/stc/SA01831WI): To allow the use of UL91 (minimum) grade aviation fuel. Petersen Aviation Inc
- [STC SA01714WI](https://openairdocs.org/stc/SA01714WI): Installation of a Garmin transponders: (a) GTX 330/330D/33/33D with ADS-B Out functionality; (b) GTX 335/335R/345/345R with ADS-B Out and In functionality; or (c) GTX 335R/345R with ADS-B Out functionality in select airplanes installed with G950/G1000 systems. Garmin International Inc
- [STC SA2586NM](https://openairdocs.org/stc/SA2586NM): Installation of J.P. Instruments temperature monitoring systems. J P Instruments
- [STC SA02428SE](https://openairdocs.org/stc/SA02428SE): Installation of an Air Stream Switch for an electric time recording device on non-pressurized aircraft. Henry F Rogers/David E Polley
- [STC SA02119SE PAGE 2](https://openairdocs.org/stc/SA02119SE%20PAGE%202): Installation of Garmin GDL 88 ADS-B UAT Transceiver System. Garmin International Inc
- [STC SA00478CH](https://openairdocs.org/stc/SA00478CH): Installation of Cooper Superflite 102 Fabric. Aviation Products Systems Inc
- [STC SA02442AK PAGE 2](https://openairdocs.org/stc/SA02442AK%20PAGE%202): Approval of the L-3 Communications NGT 2000/2500 ADS-B system. ADS-B Technologies, LLC
- [STC SA01669CH](https://openairdocs.org/stc/SA01669CH): Installation of Challenger Reusable Air Filter. Challenger Aviation Products Inc
- [STC SA02283SE PAGE 2](https://openairdocs.org/stc/SA02283SE%20PAGE%202): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In Flight Data) CGR-30P. Electronics International Inc
- [STC SA02402SE PAGE 2](https://openairdocs.org/stc/SA02402SE%20PAGE%202): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) CGR-30C. Electronics International Inc
- [STC SA00432SE](https://openairdocs.org/stc/SA00432SE): Installation of EGT 701 series fuel flow instrument. J P Instruments
- [STC SA00861SE](https://openairdocs.org/stc/SA00861SE): Installation of J.P. Instruments (JPI) fuel flow indicating system. J P Instruments
- [STC SA01487SE-D](https://openairdocs.org/stc/SA01487SE-D): Installation of a GDL 69 or GDL 69A XM Satellite Receiver. Garmin International Inc
- [STC SA2775SO](https://openairdocs.org/stc/SA2775SO): Installation of an emergency induction air door in accordance with Aircraft Specialist Installation Instructions, Alternate Air Door Adapter, dated April 30, 1990, or later FAA approved revision and Drawing Nos. AAD 16670-1, revised April 21, 1990; AAD 16670-2, revised April 21, 1990; and AAD16670-3, dated April 21, 1990, or later FAA approved revisions. WACO Classic Aircraft Corporation
- [STC SA00123BO](https://openairdocs.org/stc/SA00123BO): Installation of split cowl nose bowl. WACO Classic Aircraft Corporation
- [STC SA1884SO](https://openairdocs.org/stc/SA1884SO): Installation of sliding canopy. WACO Classic Aircraft Corporation
- [STC SA563CH](https://openairdocs.org/stc/SA563CH): Authorizes installation of engines equipped w/Unison Limited Authority Spark Advance Regulator (LASAR) ignition system w/Cylinder Head Temp. (CHT) monitoring capability on airframes. engines. Champion Aerospace LLC
- [STC SA2683NM](https://openairdocs.org/stc/SA2683NM): Installation of Precise Flight, Inc. stand-by vacuum system (SVS). Precise Flight Inc
- [STC SA8075SW](https://openairdocs.org/stc/SA8075SW): Installation of fiberglass covering. (M-62 SERIES PT-19) (G-73 SCHWEIZER). Razorback Fabrics Inc
- [STC SA1008WE](https://openairdocs.org/stc/SA1008WE): Installation of Poly-Fiber covering material. Poly-Fiber Inc
- [STC SA693CE](https://openairdocs.org/stc/SA693CE): Replace existing engine induction air filter with AC Spark Plug filter. Brackett Aero Filters Inc
- [STC SA00194AT](https://openairdocs.org/stc/SA00194AT): Installation of Appalachian Accessories carbon steel brake discs that have the melonite surface treatment, P/N AA-40. Aviation Products, Inc
- [STC SA1626NM PAGE 1](https://openairdocs.org/stc/SA1626NM%20PAGE%201): Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series). Electronics International
- [STC SA2350NM PAGE 1](https://openairdocs.org/stc/SA2350NM%20PAGE%201): Installation of Electronics International Inc digital carburetor/outside air temperature gauges. Electronics International
- [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer. Electronics International
- [STC SA3862NM PAGE 1](https://openairdocs.org/stc/SA3862NM%20PAGE%201): Installation of Electronics International Primary TIT/EGT/CHT instruments, remote switches and associated accessories. Electronics International
- [STC SA1982SO](https://openairdocs.org/stc/SA1982SO): Installation of Appalachian stainless steel brake discs P/N 75-40. Appalachian Accessories
- [STC SA2190NM PAGE 2](https://openairdocs.org/stc/SA2190NM%20PAGE%202): Installation of electronics International Digital Volt/Amp Gauges and Accessories. Electronics International
- [STC SA001410BO](https://openairdocs.org/stc/SA001410BO) (historical): Installation of an AV-30-C Multi-Mode Indicator. uAvionix Corporation
- [STC SA02019SE-D PAGE 2](https://openairdocs.org/stc/SA02019SE-D%20PAGE%202) (historical): Installation of Garmin GTN 6XX/7XX Navigation System. Garmin International Inc
- [STC SA02153LA-D](https://openairdocs.org/stc/SA02153LA-D) (historical): Installation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) System. Garmin International Inc
- [STC SA2350NM](https://openairdocs.org/stc/SA2350NM) (historical): Installation of Electronics International Inc digital carburetor/outside air temperature gauges listed on the attached continuation sheet and the associated accessories. Electronics International

## PMA parts (OpenAirDocs) (75, first 50)

Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this model on its data sheet, so check the FAA record before relying on it. Newest first.

- [S1069](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID161825987720260806152347.0001): 100R Fuel Placard. Swift Fuels, LLC · PMA PQ04423CE · Modification part · Jul 20, 2026
- [73-CFG-R](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID147363608720260806152440.0001): Fuel Quantity Indication Placard. Swift Fuels, LLC · PMA PQ04423CE · Modification part · Jul 20, 2026
- [066-001](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID118846179220260723131533.0001): Rivet. Game Aerospace, LLC · PMA PQ00052CB · Replaces Cleveland Wheels and Brakes P/N… · Jun 9, 2026
- [RAP164-04000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID137965057520260722154723.0001): Brake Disc. Rapco Inc. · PMA PQ2101CE · Replaces 164-04000 · Jun 3, 2026
- [MDL103216-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID199395150120240221143438.0001): SkyView HDX Instrumentation. Dynon Avionics, Inc. · PMA PQ05359NM · Modification part · Jan 26, 2024
- [APS105-00200](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID197917891420221020170425.0001): Rivet. Aviation Products Systems Inc · PMA PQ3830CE · Replaces 105-00200 · Aug 10, 2022
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID239728533220210702175252.0001): Aspen Avionics · PMA PQ03868SW · Jan 20, 2021
- [V674UL94](https://drs.faa.gov/browse/excelExternalWindow/E1C1EF6CEE5DC2EE862585990051C803.0001): UL94 Fuel Placard. Swift Fuels, LLC · PMA PQ04423CE · Modification part · Jun 7, 2020
- [V674UL94](https://drs.faa.gov/browse/excelExternalWindow/26465837A7672E7A86258583004BE923.0001): UL94 Fuel Placard. Swift Fuels, LLC · PMA PQ04423CE · Modification part · Nov 25, 2019
- [9100-001-C](https://drs.faa.gov/browse/excelExternalWindow/DD343890DCD8BFDB86258569004013FB.0001): MaxDim Lamp Intensity Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019
- [9100-001-D](https://drs.faa.gov/browse/excelExternalWindow/C7B6725B325949E98625856900401478.0001): MaxDim Lamp Intensity Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019
- [9200-000-B](https://drs.faa.gov/browse/excelExternalWindow/BD58B0712CA0C6AA86258569004016AD.0001): MaxPulse Landing Light Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019
- [9100-001-G](https://drs.faa.gov/browse/excelExternalWindow/ADE62C91D97E8B788625856900401557.0001): MaxDim Lamp Intensity Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019
- [9100-001-E](https://drs.faa.gov/browse/excelExternalWindow/A37F050253EE808A86258569004014BA.0001): MaxDim Lamp Intensity Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019
- [9200-000-A](https://drs.faa.gov/browse/excelExternalWindow/8E10EF4D973C1D6D8625856900401662.0001): MaxPulse Landing Light Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019
- [9100-001-A](https://drs.faa.gov/browse/excelExternalWindow/62DC748A2B9B1D9386258569004012FD.0001): MaxDim Lamp Intensity Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019
- [9100-001-F](https://drs.faa.gov/browse/excelExternalWindow/3746AAB4CC0D6883862585690040151B.0001): MaxDim Lamp Intensity Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019
- [9100-001-B](https://drs.faa.gov/browse/excelExternalWindow/32446D71EB78157686258569004013B2.0001): MaxDim Lamp Intensity Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019
- [9100-001-H](https://drs.faa.gov/browse/excelExternalWindow/1AEB415100FB45D8862585690040159F.0001): MaxDim Lamp Intensity Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019
- [700-00190-100](https://drs.faa.gov/browse/excelExternalWindow/CB6B45C441A97D20862585510065ECA1.0001): SkyTrax 100B. Avidyne Corporation · PMA PQ4035CE · Replaces N/A · May 13, 2019
- [RG-25XC](https://drs.faa.gov/browse/excelExternalWindow/946AAD8E805524B5862581DE006902EF.0001): Battery. Concorde Battery Corp · PMA PQ1174NM · Replaces RG-25XC · Oct 18, 2017
- [RG-12LSA](https://drs.faa.gov/browse/excelExternalWindow/5F9F2BB23A50D0C5862581DE006902ED.0001): Battery. Concorde Battery Corp · PMA PQ1174NM · Replaces RG-12LSA · Oct 18, 2017
- [RA063-01200](https://drs.faa.gov/browse/excelExternalWindow/11AB135F1EE8766686257EE40073FC0A.0001): Pressure Plate. Rapco Inc · PMA PQ2101CE · Replaces Cleveland 063-01200 · Oct 13, 2015
- [9230-17003-01](https://drs.faa.gov/browse/excelExternalWindow/9DD900830DCF6B3D86257EBD005F60D4.0001): L-3 Detachable Configuration Module. Acron Aviation Inc. · PMA PQ2024CE · Modification part · Aug 16, 2015
- [9060-17250-01](https://drs.faa.gov/browse/excelExternalWindow/8511FE654B6B00B686257EBD005F5E3F.0001): L-3 Kit Installation NGT-1000/ NGT-2000/ NGT-2500. Acron Aviation Inc. · PMA PQ2024CE · Modification part · Aug 16, 2015
- [9060-17500-02 (right angle RF)](https://drs.faa.gov/browse/excelExternalWindow/76DD7CDEA34E5E2786257EBD005F5FFE.0001): L-3 Kit Installation NGT-9000R Panel Mount. Acron Aviation Inc. · PMA PQ2024CE · Modification part · Aug 16, 2015
- [9230-17003-01](https://drs.faa.gov/browse/excelExternalWindow/6F3D47AA7EA319D086257EBD005F606F.0001): L-3 Detachable Configuration Module. Acron Aviation Inc. · PMA PQ2024CE · Modification part · Aug 16, 2015
- [9060-17500-01 (straight RF)](https://drs.faa.gov/browse/excelExternalWindow/55A4F1B1D6B4109F86257EBD005F5F8E.0001): L-3 Kit Installation NGT-9000R Panel Mount. Acron Aviation Inc. · PMA PQ2024CE · Modification part · Aug 16, 2015
- [9060-17000-02 (right angle RF)](https://drs.faa.gov/browse/excelExternalWindow/525673C7552CD4A286257EBD005F5F2A.0001): L-3 Kit Installation NGT-9000 Panel Mount. Acron Aviation Inc. · PMA PQ2024CE · Modification part · Aug 16, 2015
- [9060-17000-01 (straight RF)](https://drs.faa.gov/browse/excelExternalWindow/4485A55F3E10F10B86257EBD005F5EC2.0001): L-3 Kit Installation NGT-9000 Panel Mount. Acron Aviation Inc. · PMA PQ2024CE · Modification part · Aug 16, 2015
- [MDL 02041301](https://drs.faa.gov/browse/excelExternalWindow/58C1AF422F750AEE86257E28005752C8.0001): CGR-30( ) and Accessories. Electronics International Inc · PMA PQ0088NM · Modification part · Mar 4, 2015
- [064-01500-OAA](https://drs.faa.gov/browse/excelExternalWindow/3642565C2823A2A486257C4A007619F9.0001): Back Plate. Omega Aircraft Articles LLC · PMA PQ4191CE · Replaces Cleveland Wheels and Brakes P/N… · Dec 19, 2013
- [SF-101](https://drs.faa.gov/browse/excelExternalWindow/777085580E30E7B186257B7C00496D7D.0001): Fabric. Aviation Products Systems Inc · PMA PQ3830CE · Replaces Heavy Duty 3 & 101-3 · May 27, 2013
- [SF-102](https://drs.faa.gov/browse/excelExternalWindow/11B3F358931CE76A86257B7C00496E13.0001): Fabric. Aviation Products Systems Inc · PMA PQ3830CE · Replaces Medium 3 & 102-3 · May 27, 2013
- [RA066-10500-4K](https://drs.faa.gov/browse/excelExternalWindow/D93935C63D4512C186257B1A00708C43.0001): Brake Lining Kit. Rapco Inc · PMA PQ2101CE · Replaces Rapco, Inc. P/N RA66-105-4K… · Jul 20, 2012
- [RA066-10500](https://drs.faa.gov/browse/excelExternalWindow/C3DFEA1672689DA386257B1A00708984.0001): Brake Lining. Rapco Inc · PMA PQ2101CE · Replaces Cleveland Wheels & Brakes P/N… · Jul 20, 2012
- [RA105-00200](https://drs.faa.gov/browse/excelExternalWindow/B5932B14FAF5319086257B1A00709093.0001): Rivet. Rapco Inc · PMA PQ2101CE · Replaces Cleveland Wheels & Brakes P/N… · Jul 20, 2012
- [RA105-00200](https://drs.faa.gov/browse/excelExternalWindow/75D76726C1869E6886257A48004F8CDB.0001): Rivet. Rapco Inc · PMA PQ2101CE · Replaces Cleveland Wheels & Brakes P/N… · Jun 19, 2012
- [RA066-10500](https://drs.faa.gov/browse/excelExternalWindow/5EA38B1106E15C4886257A48004F85AC.0001): Brake Lining. Rapco Inc · PMA PQ2101CE · Replaces Cleveland Wheels & Brakes P/N… · Jun 19, 2012
- [RA066-10500-4K](https://drs.faa.gov/browse/excelExternalWindow/2EF00BE1E9EFB62E86257A48004F886E.0001): Brake Lining Kit. Rapco Inc · PMA PQ2101CE · Replaces Rapco, Inc. P/N RA66-105-4K… · Jun 19, 2012
- [W/T-2592](https://drs.faa.gov/browse/excelExternalWindow/E9A11A2493C9EE968625764600501D1D.0001): GREAT LAKES TALL WINDSHIELD. Great Lakes Aero Products · PMA PQ2056CE-D · Replaces 40153-3 · Sep 28, 2009
- [SC-W/G-2592-DR](https://drs.faa.gov/browse/excelExternalWindow/E3FE572B55F094318625764600501E65.0001): GREAT LAKES TALL WINDSHIELD. Great Lakes Aero Products · PMA PQ2056CE-D · Replaces 40153-3 · Sep 28, 2009
- [SC-W/G-2591](https://drs.faa.gov/browse/excelExternalWindow/DBF49E42167980B08625764600501BEB.0001): GREAT LAKES FORWARD WINDSHIELD. Great Lakes Aero Products · PMA PQ2056CE-D · Replaces 40153-7 · Sep 28, 2009
- [W-2592](https://drs.faa.gov/browse/excelExternalWindow/DB85B5165B8C90518625764600501CF3.0001): GREAT LAKES TALL WINDSHIELD. Great Lakes Aero Products · PMA PQ2056CE-D · Replaces 40153-3 · Sep 28, 2009
- [W/G-2592-DR](https://drs.faa.gov/browse/excelExternalWindow/CFDE2414BE24DF0A8625764600501E0D.0001): GREAT LAKES TALL WINDSHIELD. Great Lakes Aero Products · PMA PQ2056CE-D · Replaces 40153-3 · Sep 28, 2009
- [SC-W/T-2591-DR](https://drs.faa.gov/browse/excelExternalWindow/CAA40A561FAE995E8625764600501C9B.0001): GREAT LAKES FORWARD WINDSHIELD. Great Lakes Aero Products · PMA PQ2056CE-D · Replaces 40153-7 · Sep 28, 2009
- [W/G-2592](https://drs.faa.gov/browse/excelExternalWindow/C7BC44F6FF2E75738625764600501D4A.0001): GREAT LAKES TALL WINDSHIELD. Great Lakes Aero Products · PMA PQ2056CE-D · Replaces 40153-3 · Sep 28, 2009
- [W/T-2592-DR](https://drs.faa.gov/browse/excelExternalWindow/C56B13C7CC754DEB8625764600501DE2.0001): GREAT LAKES TALL WINDSHIELD. Great Lakes Aero Products · PMA PQ2056CE-D · Replaces 40153-3 · Sep 28, 2009
- [W-2592-DR](https://drs.faa.gov/browse/excelExternalWindow/C195C4961AF843688625764600501DC1.0001): GREAT LAKES TALL WINDSHIELD. Great Lakes Aero Products · PMA PQ2056CE-D · Replaces 40153-3 · Sep 28, 2009
- [SC-W/G-2592](https://drs.faa.gov/browse/excelExternalWindow/A851BEF662FC39B78625764600501D95.0001): GREAT LAKES TALL WINDSHIELD. Great Lakes Aero Products · PMA PQ2056CE-D · Replaces 40153-3 · Sep 28, 2009

All of them: https://openairdocs.org/model/great-lakes-2t-1a-2/pma.md

## The same model under other registry codes

Amateur-built copies and renamed makers get their own codes.

- [Waco Classic 2T-1A-2](https://openairdocs.org/model/waco-classic-2t-1a-2): 20 registered aircraft, registry code 9600427
- [Great Lakes/Fritz Joe 2T-1A-2](https://openairdocs.org/model/great-lakes-fritz-joe-2t-1a-2): 1 registered aircraft, registry code 05605C5
- [Great Lakes-Ewertz William A 2T-1A-2](https://openairdocs.org/model/great-lakes-ewertz-william-a-2t-1a-2): 0 registered aircraft, registry code 3910103
- [Great Lakes/Henderson 2T 1A 2](https://openairdocs.org/model/great-lakes-henderson-2t-1a-2): 0 registered aircraft, registry code 3910290

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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.