These match the airframe or engine model. Whether each one applies, and whether it's been complied with, depends on serial numbers, equipment and logbook entries. Applicability must be confirmed by a mechanic against the aircraft's records.
Schweizer Aircraft Corporation Model 269A, 269A-1, 269B, 269C, and TH-55A Helicopters
May 8, 2002
Airframe (269B)Only with: With tailboom support strut assemblies P/N 269A2015 or 269A2015-5, tailboom center attach fitting P/N 269A2324, or center frame aft cluster fitting P/N 269A2234 or 269A2235 installed.
Schweizer Aircraft Corporation and Hughes Helicopters, Inc. Model 269A, 269A-1, 269B…
Nov 17, 1995
Airframe (269B)Only with: Main rotor drive shaft P/N 269A5305-3 or 269A5305-11 installed, except drive shafts with serial number prefix "SZ" or "ZS".
AI-extracted — verify against original. Matched from each AD's applicability section; ADs replaced by a later AD are left out.
Service Difficulty Reports (1)
Reports of failures and defects that operators and repair stations sent to the FAA since 1995. A report describes one finding; it is not an accident.
Landing gear · piston · corrodedJul 26, 1995
THIS HELICOPTER DEVELOPED GROUND RESONANCE AND SELF-DESTRUCTED. DURING THE ACCIDENT INVESTIGATION, NOTICED BOTH LEFT SHOCK STRUT AND THE SKID ATTACH LUGS WERE SEVERELY CORRODED (EXFOLIATED) AND SEPARATED. SUGGEST REMOVAL OF ALL SHOCK STRUTS DURING ANNUAL/100-HOUR INSPECTIONS TO ENSURE NO CORROSION…
From FAA Service Difficulty Reports; matched by N-number and serial number.