PIPER SENECA II SERVICE MANUAL
VII - LANDING GEAR AND BRAKE SYSTEM 04/30/07
1J18
e. 100 Hour Upper Drag Link Attach Bolt Inspection
1. Each 100 hours, remove the nose gear drag link upper attach bolt AN7-35 or NAS6207-50D
(P/N’s 400-274 or 693-215, respectively), Item 46, Figure 7-2, and with a 10X magnifier
visually inspect for straightness, cracking or thread wear.
2. If any of the above conditions exist, replace bolt and associated hardware (see Airworthiness
Limitations, Section I). Additionally, if replacing bolt, inspect associated bushings and
bearings for deformation, cracking or wear, replace as required.
f. 100 Hour Nose Gear Drag Link Inspection (See Figure 7-2a.)
The drag links function to lock and retain the gear in its down position by traveling to a specific
overcenter locked position. The “overcenter travel” is extremely important for safe operation and
should be checked regularly. Use the following procedure to check the drag links for proper
overcenter travel and condition.
1. Jack up the airplane per Section II.
2. Check all hinge bosses on the links for cracks and security. The links should move freely but
not exhibit looseness or stop at the bushings.
3. Clean the gear with an appropriate cleaner and make sure the overcenter stops are unobstructed
and hinge points are clean.
4. See Section II and lubricate the gear.
5. With reference to Figure 7-2a, continue as follows for overcenter measurement:
NO
TE: The standard overcenter dimension is measured from the centerlines of the drag link
mounting holes. When measuring off the bolts the different bolt sizes must be taken
into account in order to obtain proper centerlines.
a.
Unbolt the down lock link assembly (3) from the lower drag link (8) and tape it up against
the retraction fitting support bracket.
CA
UTION: UPPER DRAG LINK AN7-35 OR NAS6207-50D ATTACHMENT BOLT MUST
BE REPLACED EACH 500 HOURS TIME-IN-SERVICE.
b
. Without removing the bolts, remove the cotter pins from the three drag link bolts (upper,
center, and lower) and loosen the nuts enough to withdraw them about 1/4 of an inch.
c
. Lay a “true” straightedge across the exposed grips of the upper and lower drag link bolts.
d
. Apply pressure to the top of the drag links to keep the overcenter stops in solid contact
and measure the perpendicular distance between the top surface of the center bolt grip and
the bottom of the straightedge.
e
. The measured distance must be 0.250 of an inch or greater. If the measured distance is
less than 0.250 of an inch, replace drag links.
g. 1000 Hour Nose Gear Trunnion Inspection (See Figure 7-2d.)
Beginning at 2000 hours and each 1000 hours thereafter, visually inspect the nose gear trunnion
(P/N 95723-005) for cracks in the areas shown in Figure 7-2d. Use supplemental lighting and a 10X
magnifier.
7-9c. REPAIR.
Repairs to the landing gear are limited to reconditioning of parts such as smoothing out minor nicks and
scratches, repainting areas where paint has chipped or peeled, and replacement of parts.
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