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 (269A)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 (269A)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.
Main rotor drive · spring · coil brokenFeb 27, 1995
TENSION SPRING FOR MAIN ROTOR DRIVE CLUTCH ACTUATOR FAILED. RECEIVED AND INSTALLED NEW SPRING ON 27 JAN 95. AIRCRAFT FLEW ON 19 FEB 95 AND BROKEN SPRING WAS DISCOVERED ON DAILY INSPECTION ON THE MORNING OF 20 FEB 95.
From FAA Service Difficulty Reports; matched by N-number and serial number.