## . -



## .. .**--.:..~**

. I 

### iL"J

· . _ l



### PAGE a 1 1 1 2 2 2 4 

### 4 5 6 

### JENSEN AIRCRAFT INSTRUCTIONS FOR ' 

### MODIFIED LIFr STRUT FITTINGS 6.23 7-15- 83 Revised 3- 30- 84 Revised 4- 20- 84 Revised 5- 15-84

Revisions Introduction Eligibility Required Parts Requir ed Drawings Required Tools and Equipment Procsdures Installation Documentation Conclusion A

pper .dixl.. 

### Page a Dated 7-15-83 Revised 3- 30-84, Revised 4-20-84, Revised 5- 15- 84 

### REVISIONS TO INSTALLATION INSTRUCTIONS THIS PAGE SHOWS LATEST REVISIONS INCORPORATED IN THE INSTALLATION INSTRUCTIONS REVISION/I REVISED PAGES DATE



### - -- · ----- ··· 1 2,3,4,6 3/30/84 2 a,3 4/20/84 3 3 pal: . 7 and 9 5/15/84



### ) .:Page 1 Dated 7-15-83 INSTALLATION INSTRUCTIONS FCR JENSEN LIFT STRUT FITTING INTRODUCTION:. . The Jensen lift strut fitting is designed to reduce stress in the threaded section. of the lift strut fork by providing a large crosssection through the threaded shank. I · t can be installed by any competent shop with the proper tools and personel who. have reasonable welding skills . Installation is simple, the original lift strut barrel is removed from the lift strut and replaced with the Jensen barrel by welding. ELIGIBILITY: The modification may be done to lift struts on the following aircraft. AIRCRAFT LIFT STRUT POSITION :tcLIFT STRUT PART NUMBER J-5 Front 10098- 00 PA-12 Front 10098-00 Rear 10096-00 PA-14 Front 10098-00 Rear 10096-00 PA- 16 Front 11773-00 Rear 11774-00 PA-18 Front 10098-03 Rear 10096-03 PA-20 Front ll773-03 Rear l1774-00 PA-22 Front l1773-00 Rear 11774-00 

## * PMA, certified replacement lift struts for these part numbers are also eligible. REQUIRED PARTS: The following parts are required for each lift strut modified. 1. Jensen 006. 01 Strut Fork 2. Jensen 006.02 Barrel Assembly 3. Jensen 006.03 Jam NutPage 2 Dated 7- 15-83 Revised 3/30/84 REQUIRED DRAWINGS: DRAWING 

### fl APPLICATION

6- 773A Front Strut PA - 16, PA- 20, PA- 22 6-774A Rear Strut PA-16, PA-20, PA-22 6-096A Rear Strut PA- 12, PA-14, PA-18 6- 098A Front Strut PA- 12, PA-14, PA-18, J-5 6.20-T1 Shows tool set up for each strut REQUIRED TOOLS AND EQUIPMENT: In addition to normal mechanics hand tools, the following special tools are required for installation: Alignment Tools: 1.

_}ensen

_ _ 6. 20-T1 Barrel- Strut Alignment Tool 2. Jensen 6.21-T2 Light Template Shop Tools:

Supplies:

PROCEDURES : 1. Good quality oxygen acetylene welding torch or Heliarc - TIG welder. 2. Strong

**Fl~shlight** 3 . High- speed, hand- held cut off saw with 3" x l/32 ·:>r l/16" thick cutting wheel

_ _ _ (Florid3 Pneumatic FP3801-A or Dotco 10- 10 series grinders will make a good cut off saw.) l. Welding Rod - Linde 01 or 32CMS, 1/16" 2. Silver Marking pencil (art pencil with no graphite in "lead".) 3. Linseed oil , Lion-oil, Val oil or alternate preservative - See Piper Service Bulletin No . 528B in appendix A. 4 . . Anti r;ieze compound ( Armite Laboratories NO. 250 or equivalent ) A. Before removing struts for modification: l . Make sure you have the

**nec~ssary** parts to use tool 6.20-Tl. See drawing 6. 20-Tl for proper tool set up. 2. Inspect the struts while they are still on the aircraft for general condition; dents, gouges, rust, etc. Reject struts that are unairworthy. 3. Place a piece of masking tape approximately 3" long on the top of each strut 8" from the fuselage attach bolt. Place the tape on the strut fork cen.terline parallel with the strut . Make an index mark on each strut 8" from the center of the forkbolt. Place transparent tape over the index mark to prevent erasing it while handling the strut. The index marks will allotv you to reposition the struts without re-rigging the aircraft. 

## I IPage 3 Dated 7-15- 83 Revised 4-20- 84 B. Modificaeion of lift struts: 1. Remove**origi~al** fork and jam nut and drain any preservative oil from the strut. 2. Strip paint from lower 3 inches of lift strut . 3. The tools are used as follows: 1. Before removing the original fork, drop a 3/8" bolt thru the fork and locator, then make a mark at the end of the locator on the lift strut. After the new barrel is installed screw the new fork in until the end of the lo.cator lines up with the mark on the strut. The modified strut will now be the same hole-tohole length as the un-modified strut . 2. With the lift strut secured in the alignment tool, place the cutting template on the top surface of the alignment tool and mark the strut parallel to its long axis using the two notches to guide .your pencil. The distance from the top notch to the top of the tool is approximately 2 3/8" and can be used to mark the end of the cutout. Cutting along the lines you have made will gi;re you a good fi t adequate for the job. 4. Cut through the strut wall along the marked lines using the hand held abrasive saw. Remove the old barr el assembly . 5 . Inspect the inside of the strut for corrosion. If corrosion is found see Piper Service Bulletin 528B in appendix A. On PA- 18 aircraft this visual inspection may replace the inspection required by A.D . 77-03-08. 6. Coat the 7/8-20 threads of tool 6.20- T1 with an antisieze compound. (Armite Laboratories Led- Plate No . 250 or equivalent. This type antisieze is available from machine tool supply houses for lubrication dead centers and**p~pe** threads . ) 7. The 006. 02 Barrel Assembly is made with one lengthwise welded seam. This seam is left incomplete to allow venting of the barrel cavity during welding. Thread the barrel onto the -2 -barrel l ocator assembly with the incomplete weld towards the aircraft end of the lift strut and the lengthwise welded seam located inside the lift strut so it will not be visable. 8 . See the appropriate installation drawing for the lift strut you are modifying and fit the strut to the barrel. 9. Welding barrel to lift strut: a . Tack weld the barrel to the lift strut with**4~"** tack welds. DO NOT TACK WEL D OVER THE THREADED AREA OF THE - 2BARREL LOCATOR, YOU MAY CAUSE THE THREADS-TO SEIZE. b. Screw the - 2 locator out until no threads are engaged with the barrel . Finish as much weld as poss:i.ble in the tool. c. Remove and complete welds. DO NOT FORGET TO WELD SHUT THE VENT HOLE . 10. Inspect the welds. Clean and paint the strut end. Note the "NO-STEP" sign required by A.D. 81-25-05 (Appendix C) must remain on the lift strut. 11 . Apply corrosion preventive oil to the l i ft strut accordj,ng to Piper Service Bulletin 528B . j I 1Page 4 Dated 7-1 5- 83 Revised 3/30/84 .,, INSTALLATION: 1. Install 006. 03 jam nut and 006.01 fork in the lift strut. 2. Adjust the fork by screwing it in or out until the center of the fuselage attach bolt hole is 8" from the index mark made earlier. Following the above procedure will insure that the lift strut assemblies retain their original length and re-rigging the aircraft will not be necessary . a. If you are installing new or replacement l ift struts be careful to remove the original struts without disturbing the fork adjustment, you can then compare strut lengths to avoid re-rigging the aircraft . b. If you have lost your index, or need to re-rig the aircraft refer to the appendix for rigging instruction for your aircraft .


# ___ .,

### _ _ _

_

.. 

### - - 

## - - --- 3 . Install the lift struts on the aircraft, after the fuselage -attach belt has been installed . Torque the 006.03 jam nut to 60 ft/lb. DOCUMENTATION: 1. If you modified the original struts . -·**~ --** **'i ~-** **-- --**  -- ···-- . ·----- · -- - ----·- - ···- - -- . .... . a. Complete a form 337 "Major Repair or Alteration" to document the strut alteration. (A repair station may use their internal documentation if they are rated for this type of alteration. ) i . That the lift struts were modified according to the appropriate S.T.C. and that a 337 form was completed. ii. That the lift struts were inspected visually for internal corrosion. iii . That the lift strut was treated for corrosion prevention according to Piper Service Bulletin 528B. iv. That Jensen 006. 01 Strut Fork and 006 . 03 jam nut were installed according to the appropriate S.T.C. v. If the aircraft was rigged -- State that it was rigged in accordance with the proper service memo. 2. If you installed new modified lift struts make logbook entries stating: a. That new lift struts P.N. ( see appendix N ) were installed according to the appropriate S.T.C . b. That Jensen 0.06.01 Strut Fork and 006.03 jam nut were installed according to the appropriate 

## s.r.c. c. If the .aircraft was rigged - - State that it was rigged in accordance with the proper service memo.

·3. Make a logbook entry stating th.at compliance with A.D. 81- 25- 05 is not required as per the appropriate S.T.C. 

## I !. Page 5 Dated 7- 15- 83 CONCLUSION: Installation of the Jensen 006.01 lift strut fork does not in any way release the aircraf t owner or the mechanic from their responsibility to exercise prudent and careful maintenance and inspection procedures for the modified lift strut, 006. 01 fork or 006.03 jam nut. These parts must be inspected and maintained to remain in airworthy condition as must any aircraft part. Any corrosion on the fork is cause for its replacement. Lift struts should be maintained according to Piper Service Bulletin 528B. Any failure of any of these parts should be reported to your local FAA maintenance office or to:Jensen Aircraft!

### . Page 6 Dated 7- 15-83 Revised 3/30/84 APPENDIX TO INSTALLATION INSTRUCTIONS FOR JENSEN LIFT STRUT FITTING APPENDIX A B 

## c D E F G H I J K L M 

### SUBJECT Piper Service Bulletin 528B Illustrated use of light template A.D. 77- 03-08 A.D. 81-25-05 Piper Service Memo 7 J-5 .Rigging Piper SerVice Memo 8 PA-12 Rigging Piper Service Memo 9 PA- 14 Rigging Piper Service Memo 18 PA-16 Rigging Piper Service Memo 19 PA- 18 Rigging Piper Service Memo 20 PA- 20 Rigging Piper Service Memo 21 PA-22 Rigging List of Drawings and Tools required for installation of lift strut forks List of Supplemental Type Certificates

**··- ~-**  **---** 

### ·---

# _ _

....

### - N 

### Part numbers of new modified lift struts



# i / 

## 7(I) 

# .... . 

## . **~** 

# " . . ...

### , 

### a: 

## < .., _ ,. G. ·

**~** ..J ...... 

### w a:. 

### w a: ' 

## z

**~-~** 

### ..a 

## < · CD

· C 

## o.< 

# wt-

**~(I)** 

# en! . ..J 

### 0 

### M 

## ui 

## o.> 

# wo

**~~** (/)a:



# -- !



### w 

# .... : 

# " . . z 

# - .... .... :::::t 

## <
(,) 

# ...

.· 

### . 

# 2 a. ·

**~** 

### w 

# 0 ....

.... a:



### ('I~ ! I I

**c.~**

**·** 

### Wa: :a:

**~<** 

# .... "

**(/)~** 

# ~ ..a

**~..a** 

# < ..a 

## 0.< WI- 

# - 1-(1) 

# en! 

# - <

**~ ~**  

# (/) 

# 2 CD 

### ' 

## ""' I 

# .... N