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.
Airframe (280C)Only with: Helicopters with trim relay P/N KUP14D55-24, KUP14D55-472, M83536/10-015M, or M83536/10-024M installed; does not apply to helicopters with reversible trim motor P/N 28-16621 or P/N AD1R-10.
Airframe (280C)Only with: Helicopters with a trim relay P/N KUP14D55-472, M83536/10-015M, or M83536/10-024M installed; does not apply to helicopters with reversible trim motor P/N 28-16621 or AD1R-10.
The Enstrom Helicopter Corporation Model F-28, F-28A, F-28C, F-28C-2, F-28F, 280, 280C…
Mar 19, 1996
Airframe (280C)
AI-extracted — verify against original. Matched from each AD's applicability section; ADs replaced by a later AD are left out.
Service Difficulty Reports (6)
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.
Stabilizers · bearing · delaminatedMay 19, 2004
PILOTS COMPLAINED ABOUT HEAVY COLLECTIVE AND EXCESSIVE AMOUNT OF RT COLLECTIVE INPUT TO FLY. UPON INSPECTION OF THE LAMIFLEX BEARINGS, IT WAS DISCOVERED THAT THE RUBBER AND BRASS MATERIAL WAS EXTRUDING AND DELAMINATING. UNABLE TO DETERMINE CAUSE. USEFUL LIFE IS RATED AT FIVE YEARS, AND THESE HAD…
From FAA Service Difficulty Reports; matched by N-number and serial number.
Fuselage · doubler · crackedMay 19, 2004
BULKHEAD DOUBLER UNDER NR 3 TAILROTOR DRIVESHAFT PILLOW BLOCK FOUND CRACKED. CRACKS WERE PROPAGATING FROM THE RADIUS AREA ON BOTH UPPER TABS WERE THE NUT PLATES ARE RIVETED ON. BOTH NUT PLATES HAD PREVIOUSLY BEEN ROUNDED IN THE RADIUS AREA TO REDUCE THE CHANCES OF CRACKING. IT IS POSSIBLE THAT THE…
From FAA Service Difficulty Reports; matched by N-number and serial number.
Main rotor drive · clutch · wornOct 2, 2003
ON DRIVE BELT CLUTCH MECHANISM, THE SPRING HAD WORN THROUGH THE SIDE OF THE HOUSING FROM MANY HOURS OF RUBBING BACK AND FORTH. THE ABOVE MENTIONED SPRING AND THE SPRING CAP WERE ALSO WORN BEYOND THE INSPECTION CRITERIA IN THE MFG MM. AS FAR AS WE COULD TELL FROM RESEARCHING RECORDS, THESE ARE ALL…
From FAA Service Difficulty Reports; matched by N-number and serial number.
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Rotor flight controls · control cable · wornOct 2, 2003
BOTH REAR TAIL ROTOR CONTROLS CABLES WERE WORN WHERE THEY PASS THROUGH PLASTIC FAIR-LEADS IN AFT BULKHEAD OF TAIL BOOM. BOTH WERE WORN TO 40-50 PERCENT INSP CRITERIA. THIS IS BECOMING A CHRONIC PROBLEM AS RECORDS INDICATE THEY WERE REPLACED 1 MAY 2001, AFT OF 2821.0; 15 MAR 2002, AFT OF 3159.7…
From FAA Service Difficulty Reports; matched by N-number and serial number.
Rotor flight controls · control cable · wornJun 1, 2003
BOTH LEFT AND RIGHT TAIL ROTOR CONTROL CABLES SHOW EXCESS WEAR, WHERE THEY PASS THRU THE FAIRLEADS IN THE AFT TALL CONE BULKHEAD. CABLES HAVE BEEN WEARING IN THIS LOCATION CONSTANTLY EVERY 300 TO 400 HOURS. SUGGEST A WIDER CONTACT SURFACE AREA AT THE FAIR LEAD TO REDUCE THE CONCENTRATION OF…
From FAA Service Difficulty Reports; matched by N-number and serial number.
Fuel · line · brokenJan 4, 2002
THE TUBE FAILED INSIDE THE FERRULE ON THE ENGINE DRIVEN FUEL PUMP FITTING DUE TO RUBBING AND VIBRATION. FAILURE WAS FOUND AFTER PILOT COMPLAINED OF LOW M.A.P., ABOUT 2 IN HG, AT MAXIMUM OPERATING PERIMETERS, AND FUEL CONSUMPTION LOW.
From FAA Service Difficulty Reports; matched by N-number and serial number.