170 Hardware

[T. C. Downey]

The IPB that I have does not show the attaching bolts for the rudder and elevator hinges, can any one point me to the right part number?

also the rear spar wing to fuselage bolt.

[lowNslow]

Not sure which model your asking about but for the 170B both the rudder and elevator use AN4-11A bolts. The rear spare is a AN7-24A.

[Bruce Fenstermacher]

If you are talking about the hinge to the spar they are an3-5a with an365-1032 for the rudder hinges and an3-4a for the elevator hinges.

Your probably looking for the bolts that hold the hinge halfs together because they are hard to find in the book and may not even be listed in the 170 IPC.

Here are the bolts I have found. 14-61 is a an4-11a bolt that goes throught the hinge at the center pylon. Can't find them but I'll bet it it the same bolt at the outer hinges. For the rudder I went to the A model IPC and found the two top bolts to be an4-11A and an365-428 nuts. couldn't find the lower longer bolt yet.

[Bruce Fenstermacher]

Tom has a '48

[Bruce Fenstermacher]

Tom, could rear attach bolt be the same as the front? Looking at the IPC for each wing it shows a picture of the front bolt for each wing. In the part listing for each wing it says 2 required.

[GAHorn]

Tom has a '48

Tom has begun to mimic his customers...by asking questions that don't include model, year, serial number, part number, page number, figure number or any other identifying feature. (The elevator he's rebuilding is an old Otis four-story model with the slide-out seat, collapsing cage, and brass-bell-crank control.)

[T. C. Downey]

In respect to these elevator and rudder attachment bolts are there any differences between any of the 170s?

The 170 IPC covers all the 170s and doesn't show these bolts. (that I can see)

I went by the hangar this AM and measured the bolts, the rudder requires a dash number longer than the elevator. The rudder hinge bolts are a AN4-12A (2ea) and the elevator requires a AN4-11A (3ea)

[T. C. Downey]

Tom has begun to mimic his customers...by asking questions that don't include model, year, serial number, part number, page number, figure number or any other identifying feature.

When my customers ask questions I already know which aircraft they are flying.

Many of the 170 parts are interchangeable and model, year, doesn't make a difference as in these attachment bolts for example.

[Bruce Fenstermacher]

Tom, the rudder on all models of 170 are the same so one would think the parts for all of them would be the same which is why I looked at later year IPCs. Also sometimes looking in later IPCs can give you a clue where to find something in the earlier IPCs.

The B model stabilizer and elevator are for the most part completely different than the 170 and 170A which have the stabilizer and elevator in common.

I did however look at the B model IPC to see what they listed for the outside hinges and they listed an4-11A bolts just like I suspect the 170 and 170A have but can not find listed.

[T. C. Downey]

Tom, the rudder on all models of 170 are the same so one would think the parts for all of them would be the same which is why I looked at later year IPCs. Also sometimes looking in later IPCs can give you a clue where to find something in the earlier IPCs.

The B model stabilizer and elevator are for the most part completely different than the 170 and 170A which have the stabilizer and elevator in common.

I did however look at the B model IPC to see what they listed for the outside hinges and they listed an4-11A bolts just like I suspect the 170 and 170A have but can not find listed.

The skins on the 170 elevators have 3 different sizes, but the spars, hinges, and attaching hardware are all the same. If some one has different information I sure would like to have a copy.

I believe all 3 models of the 170 have the same horizontal stab and fuselage.

[Bruce Fenstermacher]

The skins on the 170 elevators have 3 different sizes, but the spars, hinges, and attaching hardware are all the same. If some one has different information I sure would like to have a copy.

I believe all 3 models of the 170 have the same horizontal stab and fuselage.

No Tom the B model horizontal stab is a different shape (the outline), the hinges are in different places and the trim tab is completely different than the 170 and 170A. The horizontal stab may have a few parts such as a spar or rib or two which are interchangeable but you can not directly interchange much between the B horizontal stab and the earlier models.

[GAHorn]

The IPB that I have does not show the attaching bolts for the rudder and elevator hinges, can any one point me to the right part number?

also the rear spar wing to fuselage bolt.

Tom, the 170 IPC, Fig. 14 lists the elevator hinge attach bolts, Items 15, 33, and 61.
Fig 13 lists the rudder hinge attach bolts, Item 17

The wing-attach bolts are the same for all 4 locations: AN8-23A as Bruce mentioned.

[T. C. Downey]

Tom, the 170 IPC, Fig. 14 lists the elevator hinge attach bolts, Items 15, 33, and 61.
Fig 13 lists the rudder hinge attach bolts, Item 17

The wing-attach bolts are the same for all 4 locations: AN8-23A as Bruce mentioned.

Items 15 and 33 are the hardware that attaches the hinge to the elevator spar. their part number is AN3-4A that is not the pivot bolt for the hinge, that holds the rudder and elevator to the aircraft and allows it to swing left and right, up and down.

Those bolts are not shown. but measure out to be AN4-11A for the elevator, and AN4-12A for the rudder.

The items 59 and 61 are the attaching hardware for the control arm (Pylon) these were never in question.

[T. C. Downey]

The skins on the 170 elevators have 3 different sizes, but the spars, hinges, and attaching hardware are all the same. If some one has different information I sure would like to have a copy.

I believe all 3 models of the 170 have the same horizontal stab and fuselage.

No Tom the B model horizontal stab is a different shape (the outline), the hinges are in different places and the trim tab is completely different than the 170 and 170A. The horizontal stab may have a few parts such as a spar or rib or two which are interchangeable but you can not directly interchange much between the B horizontal stab and the earlier models.

I see no mention of that in Figure 12, Items 1and 2 are for the stab,Item 1 is for the whole assembly, and Item 2 is the same item less the trim tab and attaching hardware. all the skins items 43-47 are all the same.

Do you have a IPC for the "B" that shows different P/Ns ?

[Bruce Fenstermacher]

Yes Tom I have all three IPCs.

The 170 and 170A vertical stab assemblies are the same assembly part number 0332000-10 (or-20 without the trim actuator). From what I can tell and sample all the parts as expected are the same.
The B model vertical stab is a different assembly number 0532000. And it has different parts and part numbers as well as a few in common with the early vertical stab.

For example the the B model vertical stab has the same front spar assembly and many of the ribs in the nose. But the skins part number start with 053200- indicating different skins and the rear spar assembly is also different with a 0532xxx part number. As I said before the 170 and 170A vertical stab and elevators are the same and interchangeable, the B model vertical stab and elevators are not the same and not interchangeable between the early model though they do have some inner parts that are the same.