AD/HU 269/111 Lateral Control Trim Actuator Assembly 8/2005
TX
Applicability:
Model 269C, serial number (S/N) 1865 through 1874 with a prefix of
S; Model 269C-1, S/N 0169 through 0191; and Model 269D,
Configuration A, S/N 0044 through 0050 with an A suffix,
helicopters, with a lateral control trim actuator assembly, part
number (P/N) 269A7316-13, installed, except for an actuator
assembly containing a number 30 twist drill drilled hole in the
lateral trim control housing through the wall of the inner spring
tube socket.
Requirement: 1. For Model 269C, S/N 1865
through 1874, with a prefix of S, and Model 269C-1, S/N 0169
through 0191.
(a) Inspect the lateral control trim actuator assembly for a
scuffmark, indentation, or outer spring guide tube deformation.
Inspect for security of the inner spring tube in the socket of the
lateral trim control housing by rotating and pulling on the inner
spring tube. Examine the resin bead around the base of the inner
spring tube and housing socket. Resin should be translucent dark
pink in colour to indicate a good bond. Conduct the inspection by
following the Procedures in Part I of Schweizer Service Bulletin
B-283.1 or C1B- 017.1, both dated 4 March 2005, respectively, as
applicable.
(b) If a scuffmark,
indentation, or deformation exists on the outer spring tube, or the
inner spring tube is loose or has motion, or the bonding is
separated, remove the lateral control trim actuator assembly;
modify the trim control housing and the inner spring tube; and test
run the actuator assembly. Modify and test run the actuator
assembly by following the Procedures in Part II of Schweizer
Service Bulletin B-283.1 or C1B- 017.1, as applicable.
(c) If no scuffmark, indentation, or deformation exists on the
outer spring tube, or the inner spring tube is not loose, or the
bonding is not separated, modify the lateral control trim actuator
assembly as required by Requirement 1(b) of this Directive.
2. For Model 269D, Configuration A, S/N 0044 through 0050 with a
suffix of A. Modify the lateral control trim actuator assembly by
following the Procedures in Schweizer Service Bulletin DB-012,
paragraphs a through i, dated 8 February 2005.
Note: FAA AD 2005-10-12 Amdt 39-14089
refers.
Compliance:
For Requirement 1(a) Before further flight after the effective date
of this AD.
For Requirement 1(b) Before further flight after the effective date
of this AD.
For Requirement 1(c) Within the next 25 hours time-in-service (TIS)
following the inspection as detailed in Requirement 1(a) of this
Directive.
For Requirement 2 Within the next 50 hours TIS after the effective
date of this Directive.
This Airworthiness Directive becomes effective on 2 June 2005.
Background: This Directive requires inspecting,
modifying, and testing the lateral control trim actuator assembly
on certain serial-numbered helicopters following three reported
incidents of the inner spring tube separating from the lateral trim
control housing resulting in a lateral cyclic control restriction.
The actions specified in this Directive are intended to prevent
separation of the inner spring tube from the lateral trim control
housing and the associated loss of trim control, increased local
resistance to right cyclic stick movement, and an emergency landing
or subsequent loss of control of the helicopter.
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