# AD 87-20-03 R2: Seat Tracks - Type: Airworthiness directive - Status: Historical - Products: Cessna 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, 150M and 203 more - Effective: September 24, 1990 - Superseded by: AD 2011-10-09 - Amendment: 39-6669 - Docket: 86-CE-71-AD - Data sheets: TCDS 3A21, TCDS A4CE, TCDS 3A13, TCDS A6CE, TCDS 3A19, TCDS 3A12, TCDS 3A17, TCDS A13EU, TCDS 5A6, TCDS 3A24, TCDS A4EU, TCDS A9CE, TCDS A18EU, TCDS A-790, TCDS A16CE, TCDS A23EU, TCDS A-799, TCDS A13CE, TCDS A42EU, TCDS A20CE, TCDS A26EU, TCDS A2CE, TCDS A34CE - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F9645B32611A4A04862569BA004BC930.0001 - Page: https://openairdocs.org/ad/87-20-03-R2 ## The airworthiness directive 87-20-03 R2 CESSNA: Amendment 39-5729, as revised by Amendment 39-5863, is further revised by Amendment 39-6669. Docket No. 86-CE-71-AD. Applicability: To the following model airplanes, certificated in any category. Models Serial Numbers 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, 150M 15059019 thru 15079405 A150K, A150L, A150M A1500001 thru A1500734 152, A152 All 170, 170A, 170B 18000 through 27169 172, 172A, 172B, 172C, 172D, 172E, 172F, 172G, 172H, 172I, 172K, 172L, 172M, 172N, 172P, 172Q All P172D P17257120 thru P17257188 R172E, R172F, R172G, R172H, R172J All R172K R1722000 thru R1723454 172RG 172RG0001 thru 172RG1191 175, 175A 55001 thru 56777 175B, 175C 17556778 thru 17557119 177, 177A, 177B, 177RG All 180, 180A 30000 thru 32999 180A, 180B, 180C 50000 thru 50911 180D, 180E, 180F, 180G, 180H, 180J, 180K 18050912 thru 18053203 182, 182A, 182B, 182C, 182D, 182E, 182F, 182G, 182H, 182J, 182K,182L, 182M, 182N, 182P, 182Q, 182R, T182, R182,TR182 All 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F All 188, 188A, A188, A188A, 188B, A188B, T188C All 190, 195, 195A, 195B 7001 thru 7999, and 16000 thru 16183 206, U206, U206A, U206B, U206C, U206D, U206E, U206F, U206G, TU206A, TU206B, TU206C, TU206D, TU206E, TU206F, TU206G All P206, P206A, P206B, P206C, P206D, TP206A, TP206B, TP206C, TP206D P206-0001 thru P206-0603, & P206E, TP206E P20600604 thru P20600647 207, T207, 207A, T207A All 210, 210A, 210B, 210C, 210D, 210E, 210F, 210G, 210H, 210J, 210K, 210L, 210M, 210N, P210N, T210F, T210G, T210H, T210J, T210K, T210L, T210M, T210N, 210R, T210R, P210R All 210-5 (205), 210-5A (205A) 205-0001 thru 205-0577 336 336-0001 thru 336-0195 337, 337A, 337B, 337C, 337D, 337E, 337F, 337G, 337H, T337B, T337C, T337D, T337E, T337F, T337G, T337H, P337H, T337H-SP All T303 All F150G, F150H, F150J, F150K, F150L, F150M, FA150K,FA150L, FRA150L, FRA150M All FA152, F152 All FP172 FP172-0001 thru FP172-0003 F172F, F172G, F172H, F172K, F172L, F172M, F172N, F172P, FR172E, FR172F, FR172G, FR172H, FR172J, FR172K All F177RG All F182P, F182Q All FR182 All F337E, F337F, F337G, F337H All FP337 All Compliance: Required as follows, unless already accomplished per AD 87-20-03 R1, Amendment 39-5863. I. For airplanes operating for hire: (A) For airplanes having less than 1,000 hours time-in-service (TIS) on the effective date of this AD, accomplish the AD requirements prior to the accumulation of 1,100 hours TIS; (B) For airplanes having 1,000 or more hours TIS on the effective date of this AD, accomplish the AD requirements within the next 100 hours TIS; (C) Following the actions of (A) or (B) above, repeat the inspection requirements of this AD at each 100 hours TIS. These inspections can be accomplished at the next scheduled inspection or the next100 hours, whichever is later. II. For airplanes operating under FAR Part 91 (not for hire): (A) For airplanes having less than 1,000 hours TIS on the effective date of this AD, accomplish the AD requirements at the next annual inspection after the accumulation of 1,000 hours TIS; (B) For airplanes having 1,000 or more hours TIS on the effective date of this AD, accomplish the AD requirements at the next annual inspection; (C) Following the actions of (A) or (B) above, repeat the AD requirements at each annual inspection thereafter. To assure proper engagement of the seat locking mechanism and to preclude inadvertent seat slippage, accomplish the following on each pilot and copilot seat and all associated seat rails: NOTE 1: Paragraph (a) of this AD is essentially unchanged from AD 87-20-03 R1, Amendment 39-5863 and is reprinted here for the convenience of the reader. (a) In accordance with the appropriate compliance time requirement above, accomplish the following: (1) Measure each hole in the seat track(s) for excessive wear. When checking these holes for wear, an allowance of 0.020 inches below the edge of the normal surface is permitted for the required measurement. (i) If the wear dimension across any hole exceeds 0.36 inches but does not exceed 0.42 inches (see Figure 1), continue to measure each hole every 100 hours TIS for excessive wear. (ii) If the wear dimension across any hole exceeds 0.42 inches, prior to further flight, replace the seat track. (2) Visually inspect the seat rail holes for dirt and any debris, which may preclude engagement of the seat pin(s). Prior to further flight, remove any such material. (3) Lift up on the forward edge of each seat to eliminate all vertical play. In this position, measure the depth of engagement of each seat pin. If the engagement of any pin is less than 0.15 inches (see Figure 2), prior to further flight, replace or repair necessary components to achievea seat pin engagement of 0.15 inches or greater. If the track is worn, this dimension is measured from the worn surface, not the manufactured surface. (4) Visually inspect seat rollers for flat spots. Assure all rollers and washers, which are meant to rotate, turn freely on their axle bolts (or bushings if installed). Prior to further flight, replace rollers having flat spots and any worn washers. If there is any binding between the bores of the rollers, washers, and axle bolts (or bushings if installed), prior to further flight, remove, clean, and reinstall these parts. NOTE 2: Do not lubricate rollers, washers, axle bolts or bushings as the lubricant will attract dust and other particles which can cause binding. (5) Measure the wall thicknesses of the roller housing and the tang (see Figure 2). If the tang thickness has worn to less than 1/2 the housing thickness, prior to further flight, replace the roller housing. (6) Check the spring(s) that keep the lock pin(s) in position in the track holes for positive engagement action. Prior to further flight, replace any spring which does not provide positive engagement. (7) Visually inspect the seat tracks for cracks in accordance with Cessna Single Engine Service Information Letter SE83-6, dated March 11, 1983. Prior to further flight, replace any seat rail exceeding the crack criteria as specified in SE83-6 with an airworthy rail. (b) The options listed in AD 87-20-03 R1, Amendment 39-5863, for the temporary operation of the airplane are no longer an acceptable means of compliance with the requirements of this AD, but may be retained if desired. (c) Airplanes may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished. (d) Any parts replaced per this AD are exempt from the inspections required herein until such parts have attained 1,000 hours TIS. (e) An alternate method of compliance or adjustment of the initial or repetitive compliancetimes, which provides an equivalent level of safety, may be approved by the Manager, Wichita Aircraft Certification Office, Federal Aviation Administration, 1801 Airport Road, Room 100, Wichita, Kansas 67209. NOTE 3: The request should be forwarded through an FAA Maintenance Inspector, who may add comments and then send it to the Manager, Wichita Aircraft Certification Office. All persons affected by this directive may obtain copies of the document referred to herein upon request to the Cessna Aircraft Company, Customer Service, P.O. Box 1521, Wichita, Kansas 67201; or may examine this document at the Federal Aviation Administration, Office of the Assistant Chief Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106. Airworthiness Directive 87-20-03 R2 revises AD 87-20-03 R1 (Amendment 39-5863) which revised AD 87-20-03 (Amendment 39-5729). This amendment (39-6669, AD 87-20-03 R2) becomes effective on September 24, 1990. ## Related - [AD 2011-10-09](https://openairdocs.org/ad/2011-10-09): Seat Rails and Roller Housing Inspections ยท Cessna 150A, 150B, 150C and 221 more. Effective Jun 17, 2011. Supersedes this AD --- From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.