# Schweizer SGS 1-35 - Type: Aircraft model (FAA registry) - Registry code: 8050148 - Manufacturer (registry): SCHWEIZER - Model: SGS 1-35 - Aircraft type: Glider - Category: Glider - Engines: None - Seats: 1 - Weight class: Up to 12,499 lb - Cruise speed: 105 mph - Certification: Type certificated - Data sheet: [TCDS G4EA](https://openairdocs.org/tcds/G4EA) (OpenAirDocs) - Holder: K & L Soaring LLC - Registered aircraft: 28 - Page: https://openairdocs.org/model/schweizer-sgs-1-35 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 87-02-01](https://openairdocs.org/ad/87-02-01): Tow-Release Installation Inspection · K & L Soaring SGM 2-37, SGS 1-23, SGS 1-23D and 32 more. Effective Jan 21, 1987 ## Registered aircraft (28) - [N135AL](https://openairdocs.org/aircraft/N135AL): [Black Industries LLC](https://openairdocs.org/faa-owner/BLACK%20INDUSTRIES%20LLC), [Helena, MT](https://openairdocs.org/faa-place/MT/Helena), S/N 40 - [N135BD](https://openairdocs.org/aircraft/N135BD): [Dierker Robert R](https://openairdocs.org/faa-owner/DIERKER%20ROBERT%20R), [Chestertown, MD](https://openairdocs.org/faa-place/MD/Chestertown), built 1975, S/N 24 - [N135KL](https://openairdocs.org/aircraft/N135KL): [K & L Soaring LLC](https://openairdocs.org/faa-owner/K%20%26%20L%20SOARING%20LLC), [Cayuta, NY](https://openairdocs.org/faa-place/NY/Cayuta), built 1975, S/N 43 - [N135MJ](https://openairdocs.org/aircraft/N135MJ): [Emery Kyle W](https://openairdocs.org/faa-owner/EMERY%20KYLE%20W), [Mulberry, FL](https://openairdocs.org/faa-place/FL/Mulberry), built 1974, S/N 3 - [N135MN](https://openairdocs.org/aircraft/N135MN): [Kuyt Michael](https://openairdocs.org/faa-owner/KUYT%20MICHAEL), [Rochester, NY](https://openairdocs.org/faa-place/NY/Rochester), built 1975, S/N 45 - [N135MS](https://openairdocs.org/aircraft/N135MS): [Alders Neal](https://openairdocs.org/faa-owner/ALDERS%20NEAL), [Okeechobee, FL](https://openairdocs.org/faa-place/FL/Okeechobee), S/N 44 - [N135RD](https://openairdocs.org/aircraft/N135RD): [Newton Christian B](https://openairdocs.org/faa-owner/NEWTON%20CHRISTIAN%20B), [Redondo Beach, CA](https://openairdocs.org/faa-place/CA/Redondo%20Beach), built 1976, S/N 55 - [N135RM](https://openairdocs.org/aircraft/N135RM): [Bromschwig Kurt Ftrustee](https://openairdocs.org/faa-owner/BROMSCHWIG%20KURT%20FTRUSTEE), [Montgomery, TX](https://openairdocs.org/faa-place/TX/Montgomery), built 1975, S/N 48 - [N233X](https://openairdocs.org/aircraft/N233X): [Hautau Arthur David](https://openairdocs.org/faa-owner/HAUTAU%20ARTHUR%20DAVID), [Melbourne, FL](https://openairdocs.org/faa-place/FL/Melbourne), S/N 28 - [N2851H](https://openairdocs.org/aircraft/N2851H): [Smith Leonard I III](https://openairdocs.org/faa-owner/SMITH%20LEONARD%20I%20III), [Overland Park, KS](https://openairdocs.org/faa-place/KS/Overland%20Park), built 1976, S/N 51 - [N2JY](https://openairdocs.org/aircraft/N2JY): [Northern Aviation LLC](https://openairdocs.org/faa-owner/NORTHERN%20AVIATION%20LLC), [Palmer, AK](https://openairdocs.org/faa-place/AK/Palmer), built 1976, S/N 56 - [N33996](https://openairdocs.org/aircraft/N33996): [Doyle Brian G](https://openairdocs.org/faa-owner/DOYLE%20BRIAN%20G), [Windsor, MA](https://openairdocs.org/faa-place/MA/Windsor), built 1974, S/N 6 - [N34107](https://openairdocs.org/aircraft/N34107): [Strong Kurt J](https://openairdocs.org/faa-owner/STRONG%20KURT%20J), [Lake Geneva, WI](https://openairdocs.org/faa-place/WI/Lake%20Geneva), built 1975, S/N 50 - [N34173](https://openairdocs.org/aircraft/N34173): [Zacharski Robert](https://openairdocs.org/faa-owner/ZACHARSKI%20ROBERT), [Wakefield, MA](https://openairdocs.org/faa-place/MA/Wakefield), S/N 12 - [N34174](https://openairdocs.org/aircraft/N34174): built 1975, S/N 14 - [N34175](https://openairdocs.org/aircraft/N34175): [Hull Mahlon B](https://openairdocs.org/faa-owner/HULL%20MAHLON%20B), [Sedro Woolley, WA](https://openairdocs.org/faa-place/WA/Sedro%20Woolley), built 1975, S/N 15 - [N34180](https://openairdocs.org/aircraft/N34180): [Raven Nw Llp](https://openairdocs.org/faa-owner/RAVEN%20NW%20LLP), [Acme, PA](https://openairdocs.org/faa-place/PA/Acme), S/N 20 - [N34181](https://openairdocs.org/aircraft/N34181): [Folwarczny Petr](https://openairdocs.org/faa-owner/FOLWARCZNY%20PETR), [Round Lake, IL](https://openairdocs.org/faa-place/IL/Round%20Lake), built 1975, S/N 21 - [N34183](https://openairdocs.org/aircraft/N34183): [Smith Timothy A](https://openairdocs.org/faa-owner/SMITH%20TIMOTHY%20A), [Poynette, WI](https://openairdocs.org/faa-place/WI/Poynette), built 1975, S/N 33 - [N34185](https://openairdocs.org/aircraft/N34185): [Olczyk Adam](https://openairdocs.org/faa-owner/OLCZYK%20ADAM), [Woodhaven, NY](https://openairdocs.org/faa-place/NY/Woodhaven), built 1975, S/N 25 - [N34189](https://openairdocs.org/aircraft/N34189): [Mays Paul R](https://openairdocs.org/faa-owner/MAYS%20PAUL%20R), [Toney, AL](https://openairdocs.org/faa-place/AL/Toney), built 1975, S/N 39 - [N34262](https://openairdocs.org/aircraft/N34262): [Zhills Soaring LLC](https://openairdocs.org/faa-owner/ZHILLS%20SOARING%20LLC), [Temple Terrace, FL](https://openairdocs.org/faa-place/FL/Temple%20Terrace), built 1975, S/N 42 - [N623YB](https://openairdocs.org/aircraft/N623YB): [Sierra Soaring Club](https://openairdocs.org/faa-owner/SIERRA%20SOARING%20CLUB), [Ridgecrest, CA](https://openairdocs.org/faa-place/CA/Ridgecrest), S/N 38 - [N64Q](https://openairdocs.org/aircraft/N64Q): [Thurmond Clark](https://openairdocs.org/faa-owner/THURMOND%20CLARK), [Georgetown, TX](https://openairdocs.org/faa-place/TX/Georgetown), built 1975, S/N 19 - [N65882](https://openairdocs.org/aircraft/N65882): [Hall Christopher G](https://openairdocs.org/faa-owner/HALL%20CHRISTOPHER%20G), [Indianapolis, IN](https://openairdocs.org/faa-place/IN/Indianapolis), built 1974, S/N 2 - [N65919](https://openairdocs.org/aircraft/N65919): [Ellis Lee Demott III](https://openairdocs.org/faa-owner/ELLIS%20LEE%20DEMOTT%20III), [Lutz, FL](https://openairdocs.org/faa-place/FL/Lutz), S/N 29 - [N75135](https://openairdocs.org/aircraft/N75135): [Pitoniak Michael](https://openairdocs.org/faa-owner/PITONIAK%20MICHAEL), [Townsend, MA](https://openairdocs.org/faa-place/MA/Townsend), built 1975, S/N 35 - [N9JK](https://openairdocs.org/aircraft/N9JK): [Stewart James D](https://openairdocs.org/faa-owner/STEWART%20JAMES%20D), [Trussville, AL](https://openairdocs.org/faa-place/AL/Trussville), built 1975, S/N 18 ## NTSB investigations (24) 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 CEN21LA281](https://openairdocs.org/ntsb/CEN21LA281), Jun 20, 2021: Schweizer SGS 1-35 (N2851H), Wellington, CO, substantial damage. Probable cause: The glider pilot’s loss of visual references during the landing approach resulting in an off-airport landing on rough sloping terrain. - [NTSB ERA21FA239](https://openairdocs.org/ntsb/ERA21FA239), Jun 6, 2021: Schweizer SGS 1-35 (N2878H), Wurtsboro, NY, substantial damage, 1 fatal. Probable cause: The pilot’s low-altitude release from tow for reasons that could not be determined, and his subsequent exceedance of the glider’s critical angle of attack while returning to the runway, which… - [NTSB GAA18CA557](https://openairdocs.org/ntsb/GAA18CA557), Sep 1, 2018: Schweizer SGS 1 35 (N34107), Burnet, TX, substantial damage. Probable cause: The pilot's failure to extend the landing gear before landing and to use the Before Landing checklist. - [NTSB NYC06LA127](https://openairdocs.org/ntsb/NYC06LA127), May 28, 2006: Schweizer SGS 1-35 (N91MC), Eighty Four, PA, substantial damage, 1 fatal. Probable cause: The pilot's incapacitation, which resulted in a loss of aircraft control during approach, and subsequent collision with trees. - [NTSB LAX04CA246](https://openairdocs.org/ntsb/LAX04CA246), Jun 23, 2004: Schweizer 1-35 (N2874H), Sparks, NV, substantial damage. Probable cause: the pilot's misjudgment of altitude and distance resulting in an undershoot of the runway. - [NTSB NYC01LA225](https://openairdocs.org/ntsb/NYC01LA225), Sep 8, 2001: Schweizer SGS 1-35 (N2540H), Cumberland, MD, substantial damage. Probable cause: The pilot misjudged distance and altitude. A factor was the pilot's lack of familiarity with the glider. - [NTSB SEA00LA085](https://openairdocs.org/ntsb/SEA00LA085), May 6, 2000: Schweizer SGS 1-35 (N34173), Seaside, OR, substantial damage. Probable cause: The pilot's improper decision to continue to a point where he could not be assured of reaching a safe landing-out site if he encountered an area of significant sink after departing his planned route… - [NTSB LAX98LA147](https://openairdocs.org/ntsb/LAX98LA147), Apr 28, 1998: Schweizer SGS-1-35 (N34187), Maricopa, AZ, substantial damage. Probable cause: The pilot's loss of control in flight for undetermined reasons. - [NTSB NYC97LA108](https://openairdocs.org/ntsb/NYC97LA108), Jun 8, 1997: Schweizer SGS 135 (N17976), Pepperell, MA, substantial damage. Probable cause: The pilot's failure to maintain airspeed during a turn, which resulted in an inadvertent stall and subsequent uncontrolled descent into water. - [NTSB NYC90LA193](https://openairdocs.org/ntsb/NYC90LA193), Aug 14, 1990: Schweizer SGS 1-35 (N34461), Erwinna, PA, destroyed. Probable cause: INADVERTENT RELEASE OF THE TOW LINE AT LOW ALTITUDE. A CONTRIBUTING FACTOR WAS THE LANDING IN UNSUITABLE TERRAIN. - [NTSB LAX86LA316](https://openairdocs.org/ntsb/LAX86LA316), Aug 3, 1986: Schweizer SGS-1-35 (N34180), Marana, AZ, substantial damage - [NTSB NYC85FHM01](https://openairdocs.org/ntsb/NYC85FHM01), Jun 2, 1985: Schweizer SGS-1-35 (N9JK), Middletown, NY, substantial damage - [NTSB CHI80FEE30](https://openairdocs.org/ntsb/CHI80FEE30), Jun 20, 1980: Schweizer 1-35 (N34266), Hinckley, IL, destroyed - [NTSB NYC80DHM20](https://openairdocs.org/ntsb/NYC80DHM20), Jun 5, 1980: Schweizer SGS135 (N2878H), Matamoras, NY, substantial damage - [NTSB MIA80DLD18](https://openairdocs.org/ntsb/MIA80DLD18), Nov 23, 1979: Schweizer SGS135 (N34185), Lakeland, FL, substantial damage - [NTSB LAX80DUM04](https://openairdocs.org/ntsb/LAX80DUM04), Nov 10, 1979: Schweizer SGS135 (N40BS), San Diego, CA, substantial damage - [NTSB NYC80FGT01](https://openairdocs.org/ntsb/NYC80FGT01), Oct 14, 1979: Schweizer SGS135 (N34182), Port Matilda, PA, substantial damage - [NTSB LAX78DUJ62](https://openairdocs.org/ntsb/LAX78DUJ62), May 29, 1978: Schweizer 1-35 (N135RD), Maricopa, AZ, destroyed - [NTSB MIA77DLG31](https://openairdocs.org/ntsb/MIA77DLG31), Aug 7, 1977: Schweizer SGS135 (N34176), Rock Hill, SC, substantial damage - [NTSB OAK77DXQ25](https://openairdocs.org/ntsb/OAK77DXQ25), Jun 4, 1977: Schweizer 1-35 (N135V), Dayton, NV, substantial damage - [NTSB CHI77FEK19](https://openairdocs.org/ntsb/CHI77FEK19), May 18, 1977: Schweizer 1-35 (N34291), Derwent, OH, substantial damage, 1 fatal - [NTSB CHI76DEE64](https://openairdocs.org/ntsb/CHI76DEE64), Jun 26, 1976: Schweizer SGS135 (N34266), Hinckley, IL, substantial damage - [NTSB NYC76FNE21](https://openairdocs.org/ntsb/NYC76FNE21), May 28, 1976: Schweizer SGS135 (N34189), Plymouth, CT, substantial damage - [NTSB LAX76AL021](https://openairdocs.org/ntsb/LAX76AL021), Sep 21, 1975: Schweizer SGS135 (N34087), Maricopa, AZ, destroyed, 1 fatal ## FAA accident and incident reports (24) 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 20210620007909A](https://openairdocs.org/incident/20210620007909A), Jun 20, 2021: Schweizer SGS 1-35 (N2851H), Wellington, CO, Substantial damage. On June 20 2021 at 1800 N2851H sustained substantial damage during an off airport landing at Owl Canyon gliderport 4CO2. The PIC had trailered his glider to… - [Accident 20210606014829A](https://openairdocs.org/incident/20210606014829A), Jun 6, 2021: Schweizer SGS 1-35 (N2878H), Wurtsboro, NY, Destroyed, 1 fatal. Glider N2878H was under tow on climb out from runway 23 at N82, at approximately 200FT AGL the glider disconnected from the tow plane and began a descending… - [Accident 20180901012729A](https://openairdocs.org/incident/20180901012729A), Sep 1, 2018: Schweizer SGS 1-35 (N34107), Burnet, TX, Substantial damage. On 09/01/2018 at approximately 1200-1300 hours, the airman, [privacy data omitted] took off from front line flyers glider port in briggs, TX. He received… - [Accident 20060528014279A](https://openairdocs.org/incident/20060528014279A), May 28, 2006: Scwzer SGS135 (N91MC), Eighty Four, PA, Destroyed, 1 fatal. (-23) Aircraft was in landing pattern. Witness stated aircraft left wing dropped down then nose of aircraft pointed down toward the ground. Aircraft hit a tree… - [Accident 20040623015959A](https://openairdocs.org/incident/20040623015959A), Jun 23, 2004: Scwzer SGS135 (N2874H), Sparks, NV, Substantial damage. (-23) After a 2:15 hr flight the pilot was on approach to a runway about 150 feet high when he encountered a wind shear from a microburst generated from a… - [Accident 20010908039349A](https://openairdocs.org/incident/20010908039349A), Sep 8, 2001: Scwzer SGS135 (N2540H), Cumberland, MD, Destroyed. (-23) Pilot was flying this type glider for the first time, after receiving a cockpit briefing from an instructor the pilot was towed to 3000 feet for a local… - [Accident 20000506007689A](https://openairdocs.org/incident/20000506007689A), May 6, 2000: Scwzer SGS135 (N34173), Seaside, OR, No damage. (-23) Glinder encountered strong sink and rapidly lost altitude. - [Accident 19980428015339A](https://openairdocs.org/incident/19980428015339A), Apr 28, 1998: Scwzer SGS135 (N34187), Maricopa, AZ, Substantial damage. Glider pilot on tow began yaw left and right on tow. Towline broke struck a ditch short of runway. Possible stroke. (.4)on April 28, 1998, at 1315 hours… - [Accident 19970608013509A](https://openairdocs.org/incident/19970608013509A), Jun 8, 1997: Scwzer SGS135 (N17976), Pepperell, MA, Substantial damage. Sailplane too high on final approach, attempted a 360 degree turn, went into a stall spin, crashed. (-23) on 06/08/97 @1805 EDT, N17976, a Schweizer sgs 135,… - [Accident 19900814032989A](https://openairdocs.org/incident/19900814032989A), Aug 14, 1990: Scwzer SGS135 (N34461), Erwinna, PA, Destroyed. Too much slack in tow rope on initial takeoff unhooked rope. Glider struck a berm on landing off airport. - [Accident 19860803040159A](https://openairdocs.org/incident/19860803040159A), Aug 3, 1986: Scwzer SGS135 (N34180), Marana, AZ, Substantial damage. Glider landed hard aftrer a high fast approach. Landed long, aircraft departed the end of the runway. - [Accident 19850602058459A](https://openairdocs.org/incident/19850602058459A), Jun 2, 1985: Scwzer SGS135 (N9JK), Middletown, NY, Substantial damage. Recovered from stall spin with loss of altitude in pattern. Landed on highway unusually hard. - [Accident 19800620024569A](https://openairdocs.org/incident/19800620024569A), Jun 20, 1980: Scwzer SGS135 (N34266), Hinckley, IL, Destroyed. Pilot made improper recovery from spin and wing failed. - [Accident 19800605023249A](https://openairdocs.org/incident/19800605023249A), Jun 5, 1980: Scwzer SGS135 (N2878H), Matamoras, PA, Substantial damage. Wind gust pick up wing on lift-off. During glider tow, other wing hit ground. Cartwheeled. - [Accident 19791123034719A](https://openairdocs.org/incident/19791123034719A), Nov 23, 1979: Scwzer SGS135 (N34185), Lakeland, FL, Substantial damage. Glider hit tree attempting to land in field. Pilot misjudged altitude. Overshot turn to field. - [Accident 19791110034289A](https://openairdocs.org/incident/19791110034289A), Nov 10, 1979: Scwzer SGS135 (N40BS), San Diego, CA, Substantial damage. Pilot overshot runway in a glider. Tried to make a turn, stalled. - [Accident 19791014029169A](https://openairdocs.org/incident/19791014029169A), Oct 14, 1979: Scwzer SGS135 (N34182), Port Matilda, PA, Substantial damage. Pilot was ridge soaring. Wing tip hit a tree causing glider to crash into trees. - [Accident 19780530011731A](https://openairdocs.org/incident/19780530011731A), May 30, 1978: Scwzer SGS135 (N135RD), Maricopa, AZ, Destroyed. Both gliders working thermals. - [Accident 19770807023909A](https://openairdocs.org/incident/19770807023909A), Aug 7, 1977: Scwzer SGS135 (N34176), Rock Hill, SC, Substantial damage. Nose and tail wheel equipped. - [Accident 19770604013079A](https://openairdocs.org/incident/19770604013079A), Jun 4, 1977: Scwzer SGS135 (N135V), Dayton, NV, Substantial damage. Monowheel. Gust 15K. - [Accident 19770518020329A](https://openairdocs.org/incident/19770518020329A), May 18, 1977: Scwzer SGS135 (N34291), Derwent, OH, Substantial damage. Single wheel retractable. - [Accident 19760626021029A](https://openairdocs.org/incident/19760626021029A), Jun 26, 1976: Scwzer SGS135 (N34266), Hinckley, IL, Substantial damage - [Accident 19760528013649A](https://openairdocs.org/incident/19760528013649A), May 28, 1976: Scwzer SGS135 (N34189), Plymouth, CT, Substantial damage. Single wheel glider. - [Accident 19750921037079A](https://openairdocs.org/incident/19750921037079A), Sep 21, 1975: Scwzer SGS135 (N34087), Maricopa, AZ, Destroyed. Flew into mtn slope. OBS stated wind was blowing very hard. ## Service difficulty reports (1) As reported by operators and repair stations, by the model named in the report. - [SDR 2019FA0000336](https://openairdocs.org/sdr/2019FA0000336), Oct 11, 2019: SEAL. LOOSE. STATIC PORTS AS INSTALLED WERE INITIALLY GLUED TO THE FUSELAGE SKIN, THE ADHESIVE MATERIAL IS NOW DRIED OUT LEAVING THE STATIC SYSTEM INEFFECTIVE AND INOPERATIV ## STCs that may be installed (OpenAirDocs) (2) 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 SA01734SE](https://openairdocs.org/stc/SA01734SE): Application of Stewart Systems synthetic fabric covering system to aircraft fuselage, wings, tail surfaces, control surfaces and related parts. Andrew D. Humphrey - [STC SG01164CH](https://openairdocs.org/stc/SG01164CH): Install Cooper superflite 102 fabric. Aviation Products Systems Inc --- 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.