# SAIB AIR-21-16: FLIGHT COMPARTMENT EQUIPMENT, Cessna Seat Back Attachment Bolt Inspection - Type: Special airworthiness information bulletin (advisory, not mandatory) - Status: Current - Revision: 0 - Issued: August 26, 2021 - Products: Textron 172K, 172L, 172M, 172N, 172P, 172Q, 177, 177A, 177B, 177RG, 180H, 180J and 75 more - Product type: Aircraft, Small Airplane - PDF: https://openairdocs.org/files/sha256/5c/0d/5c0d0206aa96e46d07657c34582cc037ad3a34ed40e4843365729bab12181c46 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D9651BF0C0DC61058625873D00675DBC.0001 - DRS record last changed: August 26, 2021 - Page: https://openairdocs.org/saib/AIR-21-16 ## Text FAA Aviation Safety **SPECIAL AIRWORTHINESS** INFORMATION BULLETIN SUBJ: FLIGHT COMPARTMENT EQUIPMENT, Cessna Seat Back Attachment Bolt Inspection SAIB: AIR-21-16 Date: August 26, 2021 This is information only. Recommendations aren’t mandatory. Introduction This Special Airworthiness Information Bulletin (SAIB) informs owners and operators of an airworthiness concern for Textron Aviation (formerly Cessna Aircraft Company) 172K, 172L, 172M, 172N, 172P, 172Q, F172H, F172K, F172L, F172M, F172N, F172P, FR172K, R172K, 177, 177A, 177B, 177RG, F177RG, 180H, 180J, 180K, 182M, 182N, 182P, 182Q, 182R, F182P, F182Q, A185E, A185F, 188, 188A, 188B, A188, A188A, A188B, T188C, P206D, P206E, TP206D, TU206D, TU206E, U206D, U206E, U206F, U206G, 207, 207A, T207, T207A, 210K, 210L, 210M, 210N, 210R, T210K, T210L, T210M, T210N, T210R, 337, 337A, 337B, 337C, 337D, 337E, 337F, 337G, 337H, F337G, F337H, F337E, F337F, FT337E, FT337F, FT337GP, FT337HP, M337B, P337H, T337B, T337C, T337D, T337E, T337F, T337G, and T337H model airplanes. Specifically, this SAIB notifies owners and operators of updates to Textron Aviation service and maintenance manuals for the affected airplanes to include detailed inspections for the bolts that attach the seat back to the seat base of the pilot and copilot seats for all airplanes using seat part numbers 0515001-20, -25, -26, -208, -209, -210, and -211. At this time, the airworthiness concern is not an unsafe condition that would warrant airworthiness directive (AD) action under Title 14 of the Code of Federal Regulations (14 CFR) part 39. Background The FAA received a safety recommendation regarding a Cessna 172K landing accident. During application of the brakes on landing, the pilot’s seat back collapsed, contributing to the pilot losing line-of-sight of the runway. The airplane departed the runway and collided with the airport’s segmented circle. The pilot and passenger were not injured; however, the airplane suffered substantial damage. The left-hand bolt attaching the seat back to the seat base had failed. The airplane’s most recent 100-hour inspection was completed two months prior to the accident. Review of service difficulty reports identified additional reports of damaged or suspected incorrect hardware installed in the seat back to seat base connection. Recommendations The FAA recommends that owners and operators of the affected airplanes with seat part numbers 0515001-20, -25, -26, -208, -209, -210, and -211 installed perform a repetitive 200 hour visual inspection of the bolts that attach the seat back to the seat base of the pilot and copilot seats, as detailed in the updated service and maintenance manuals listed in the table below. Bolts should be inspected for poor condition and apparent defects and replaced if poor condition or apparent defects are found. 2 Manual P/N Title Years Temporary Revision (TR) Number 170 Series CD972 Model 172 Skyhawk Series Service Manual 1969-1976 D972-4TR7 CD2065 Model 172 Series Service Manual 1977-1986 D2065-3TR9 CD2027 Model R172 Series Service Manual 1977-1981 D2027-1TR9 CD841 Model 177 Service Manual 1968-1978 D841-8TR12 CD991 Model 177RG Maintenance Manual 1971-1975 D991-3TR11 CD2009 Model 177RG Series Service Manual 1976-1978 D2009-4TR14 180 Series CD2000 Model 180 and 185 Service Manual 1969-1980 D2000-9TR10 CD2067 Model 180 and 185 Service Manual 1981-1985 D2067-1TR10 CD2006 Model 182 Series Service Manual 1969-1976 D2006-4TR7 CD2068 Model 182 and T182 Series Maintenance Manual 1977-1986 D2068-3TR7 CD2054 Model 188 and T188 Series Service Manual 1966-1984 D2054-1TR8 200 Series CD2007 Model 206 and T206 Series Service Manual 1969-1976 D2007-3TR11 CD2070 Model 206 and T206 Series Service Manual 1977-1986 D2070-3TR12 CD2060 Model 207 and T207 Series Service Manual 1969-1984 D2060-1TR10 CD2004 Model 210 Centurion Series Service Manual 1970-1976 D2004-5TR16 CD2057 Model 210 and T210 Series Service Manual 1977-1984 D2057-3TR16 CD2073 Model 210 and T210 Series Service Manual 1985-1986 D2073-2TR14 300 Series CD2500 Model 337, T337, F337 and FT337 Super Skymaster Series Service Manual 1965-1973 D2500-2TR11 CD2506 Model 337 and Turbo Series Service Manual 1974-1980 D2506-8TR11 CD2516 Model 337 Pressurized Series Service Manual 1973-1980 D2516-9TR10 For Further Information Contact Bobbie Kroetch, Aerospace Safety Engineer, 1801 Airport Road, Room 100, Wichita, KS 67209; phone: (316) 946-4155; fax: (316) 946-4107; e-mail: bobbie.kroetch@faa.gov or Wichita- COS@faa.gov. For Related Service Information Contact Textron Aviation Inc., One Cessna Boulevard, Wichita, KS 67215; phone: (316) 517-6061; e-mail: structures@txtav.com. ## Registered aircraft it may concern (OpenAirDocs) Registry models matched by make and model, the same way as ADs, most registered aircraft first. - [Cessna 172M](https://openairdocs.org/model/cessna-172m): 3,573 registered aircraft (airframe model) - [Cessna 172N](https://openairdocs.org/model/cessna-172n): 3,138 registered aircraft (airframe model) - [Cessna 182P](https://openairdocs.org/model/cessna-182p): 2,099 registered aircraft (airframe model) - [Cessna 182Q](https://openairdocs.org/model/cessna-182q): 1,565 registered aircraft (airframe model) - [Cessna A185F](https://openairdocs.org/model/cessna-a185f): 1,120 registered aircraft (airframe model) - [Cessna 172P](https://openairdocs.org/model/cessna-172p): 1,111 registered aircraft (airframe model) - [Cessna 172K](https://openairdocs.org/model/cessna-172k): 1,026 registered aircraft (airframe model) - [Cessna 172L](https://openairdocs.org/model/cessna-172l): 857 registered aircraft (airframe model) - [Cessna 177B](https://openairdocs.org/model/cessna-177b): 843 registered aircraft (airframe model) - [Cessna 177RG](https://openairdocs.org/model/cessna-177rg): 788 registered aircraft (airframe model) - [Cessna R172K](https://openairdocs.org/model/cessna-r172k): 653 registered aircraft (airframe model) - [Cessna 182R](https://openairdocs.org/model/cessna-182r): 487 registered aircraft (airframe model) - [Cessna T210N](https://openairdocs.org/model/cessna-t210n): 466 registered aircraft (airframe model) - [Cessna 177](https://openairdocs.org/model/cessna-177): 446 registered aircraft (airframe model) - [Cessna 182M](https://openairdocs.org/model/cessna-182m): 432 registered aircraft (airframe model) - [Cessna 180H](https://openairdocs.org/model/cessna-180h): 366 registered aircraft (airframe model) - [Cessna U206G](https://openairdocs.org/model/cessna-u206g): 347 registered aircraft (airframe model) - [Cessna 182N](https://openairdocs.org/model/cessna-182n): 336 registered aircraft (airframe model) - [Cessna T210M](https://openairdocs.org/model/cessna-t210m): 321 registered aircraft (airframe model) - [Cessna T210L](https://openairdocs.org/model/cessna-t210l): 305 registered aircraft (airframe model) - [Cessna 180K](https://openairdocs.org/model/cessna-180k): 274 registered aircraft (airframe model) - [Cessna 180J](https://openairdocs.org/model/cessna-180j): 266 registered aircraft (airframe model) - [Cessna A185E](https://openairdocs.org/model/cessna-a185e): 252 registered aircraft (airframe model) - [Cessna 210L](https://openairdocs.org/model/cessna-210l): 234 registered aircraft (airframe model) - [Cessna U206F](https://openairdocs.org/model/cessna-u206f): 230 registered aircraft (airframe model) - [Cessna A188B](https://openairdocs.org/model/cessna-a188b): 212 registered aircraft (airframe model) - [Cessna 210M](https://openairdocs.org/model/cessna-210m): 122 registered aircraft (airframe model) - [Cessna T337G](https://openairdocs.org/model/cessna-t337g): 118 registered aircraft (airframe model) - [Cessna 337G](https://openairdocs.org/model/cessna-337g): 96 registered aircraft (airframe model) - [Cessna 177A](https://openairdocs.org/model/cessna-177a): 81 registered aircraft (airframe model) - [Cessna 210N](https://openairdocs.org/model/cessna-210n): 81 registered aircraft (airframe model) - [Cessna 207A](https://openairdocs.org/model/cessna-207a): 75 registered aircraft (airframe model) - [Cessna 337A](https://openairdocs.org/model/cessna-337a): 55 registered aircraft (airframe model) - [Cessna 210K](https://openairdocs.org/model/cessna-210k): 50 registered aircraft (airframe model) - [Cessna 337](https://openairdocs.org/model/cessna-337): 50 registered aircraft (airframe model) - [Cessna T207A](https://openairdocs.org/model/cessna-t207a): 44 registered aircraft (airframe model) - [Cessna 337D](https://openairdocs.org/model/cessna-337d): 42 registered aircraft (airframe model) - [Cessna T188C](https://openairdocs.org/model/cessna-t188c): 42 registered aircraft (airframe model) - [Cessna 207](https://openairdocs.org/model/cessna-207): 40 registered aircraft (airframe model) - [Cessna 337B](https://openairdocs.org/model/cessna-337b): 40 registered aircraft (airframe model) - [Cessna M337B](https://openairdocs.org/model/cessna-m337b): 34 registered aircraft (airframe model) - [Cessna 337C](https://openairdocs.org/model/cessna-337c): 33 registered aircraft (airframe model) - [Cessna P337H](https://openairdocs.org/model/cessna-p337h): 31 registered aircraft (airframe model) - [Cessna U206E](https://openairdocs.org/model/cessna-u206e): 31 registered aircraft (airframe model) - [Cessna P206D](https://openairdocs.org/model/cessna-p206d): 28 registered aircraft (airframe model) - [Cessna T210R](https://openairdocs.org/model/cessna-t210r): 28 registered aircraft (airframe model) - [Cessna T210K](https://openairdocs.org/model/cessna-t210k): 26 registered aircraft (airframe model) - [Cessna U206D](https://openairdocs.org/model/cessna-u206d): 26 registered aircraft (airframe model) - [Cessna 337F](https://openairdocs.org/model/cessna-337f): 24 registered aircraft (airframe model) - [Cessna T337H](https://openairdocs.org/model/cessna-t337h): 23 registered aircraft (airframe model) All 85: https://openairdocs.org/saib/AIR-21-16/models.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.