FAA Maintenance Alert

Cessna: 120—337 (see list); Main Landing Gear Fatigue; ATA 3213
(The following alert originates from the Wichita Aircraft Certification Office. It affects the following Cessna model aircraft: 120, 140, 150, 152, 170, 172, 175, 177, 180, 182, 185, 188, 190, 195, 205, 206, 207, 208, 210, 336, and 337. Contact information is found at the article’s end.)
“The Wichita ACO (Aircraft Certification Office) conducted statistical analyses on SDR’s (Service Difficulty Reports) and accident data from the NTSB (National Transportation and Safety Board). The analyses indicate wearout (fatigue failure) of the landing gear spring struts. The spring struts, axles, and associated hardware on the above aircraft need to be visually inspected at or before 1400 flight hours, and at 100-hour or during annual inspections, thereafter. The ACO further recommends the spring struts be inspected using magnetic particle or florescent dye-penetrant at or before 1400 flight hours, and at 100-hour or during annual inspections, thereafter. These inspections target corrosion, pitting, and cracking on gear springs—particularly on those airplanes having had skis installed and/or having been operated on rough, unimproved runways.
“Cessna has released six Temporary Revisions (TR’s) to the maintenance manuals. All of these documents are dated July 1, 2007 and include:
D138-1-13: TR5 (100 series…1953-1962)
D637-1-13: TR7 (100 series…1963-1968)
D2000-9-13: TR5 (180 & 185 series…1969-1980)
D2067-1-13: TR5 (180 & 185 series…1981-1985)
D2007-3-13: TR7 (206 & T206 series…1966-1976)
D2070-3-13: TR8 (206 series…1977-1986)
The following twelve TR’s will be released soon:
D238: 1TR6 (336 series)
D470: TR5 (200 series)
D606: 1TR6 (200 series)
D693: 1TR7 (210...year 1969)
D849: 5TR5 (FR172 series)
D971: 3TR4 (150 series)
D972: 4TR4 (172 series)
D2006: 4TR4 (182 series)
AC 43-16A December 2007 Page 4
D2054: 1TR6 (188 series)
D2500: 2TR8 (337 series)
D2506: 8TR8 (337 series)
D2516: 9TR7 (P337 series) MORE