Airworthiness directives › 2012-11-05
AD 2012-11-05 Airworthiness Directives; Enstrom Helicopter Corporation Helicopters
Makes named: enstrom. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD supersedes AD 2011-26-10, Amendment 39-16900 (77 FR 729, January 6, 2012).
Compliance
Within 5 hours time-in-service (TIS) or at the next annual or 100 hour TIS inspection, whichever occurs first: (1) For the Enstrom Model F-28C, F-28C-2, F-28F, 280C, 280F, and 280FX helicopters, modify the lateral and longitudinal trim actuator assemblies using the cyclic trim assembly kit (modification kit), P/N 28-01063-1, in accordance with the instructions in paragraph 6.1 of the Enstrom Service Directive Bulletin (SDB) No. 0110, Revision 4, dated January 23, 2012 (SDB No. 0110 R4), except when the instructions specify using “Aeroshell 22 grease” or “VC-3 Vibra-tite thread locker,” you may use an equivalent product. (2) For the Enstrom Model TH-28, 480, and 480B helicopters, modify the lateral and longitudinal trim actuator assemblies using the modification kit, P/N 4230045-1, in accordance with the instructions in paragraph 6.1 of the Enstrom SDB No. T-039, Revision 3, dated July 6, 2011 (SDB No. T-039 R3), except when the instructions specify using “Aeroshell 22 grease” or “VC-3 Vibra-tite thread locker,” you may use an equivalent product, and you are not required to contact Enstrom Customer Service. (3) After modifying the lateral and longitudinal trim actuator assemblies in accordance with paragraphs (f)(1) or (f)(2) of this AD, before further flight, operationally test the trim limits in accordance with paragraph 6.2. of the SDB for your model helicopter, and determine during a flight test whether there is appropriate trim authority in accordance with paragraph 6.3. of the SDB for your model helicopter.
Required actions
A one-time special-flight permit may be issued in accordance with 14 CFR 21.197 and 21.199 provided the helicopter is operated with the trim system circuit breaker pulled.
Unsafe condition
You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time.
Affected ADs
This AD defines the unsafe condition as a failure of a trim relay in the cyclic trim system. This condition could result in reduced controllability of the helicopter and subsequent loss of control of the helicopter.
Read the original on the Federal Register →
You just looked this one up by hand
TrackAD holds all 12,278 of them and matches them against the aircraft you actually look after — airframe, engine, propeller and appliances in one pass — then works out what falls due and when.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1