HARTZELL Propeller Owner's Manual115N

5. Painting After Repair

Propeller blades are painted with a durable specialized coating thatis resistant to abrasion. If this coating becomes eroded, it isnecessary to repaint the blades to provide proper corrosion anderosion protection. Painting should be performed by an

I appropriately licensed propeller repair facility in accordance withHartzell Manual202A (61-01-02).It is permissible to perform a blade touch-up with aerosol paint inaccordance with the procedures in Painting of Aluminum Bladesthat follows.

I Refer to Table 6-11 for paints approved for blade touch-up.

Vendor HartzellVendor Color/Tvpe PIN PIN

Tempo Epoxy Black A-150 nfa

Tempo Eooxv Grav A-151 nfa

Tempo Eooxv White (tip stripe) A-152 nfa

Tempo Epoxy Red (tip stripe) A-153 nfa

Tempo Epoxy Yellow (tip stripe) A-154 nfa

Sherwin-Williams Black L4B89510 A-6741-145-1

Sherwin-Williams Gray L4A89503 A-6741-146-1

Sherwin-Williams White (tip stripe) L4W89611 A-6741-147-1

Sherwin-Williams Red (tip stripe) L4R8912 A-6741-149-1

Sherwin-Williams Yellow (tip stripe) L4Y89572 A-6741-150-1

Sherwin-Williams Silver Metallic F63BXS0627 -4389 1,\-6741-163-1

Painl2

IApproved Paints

Table 6-11

MAINTENANCE PRACTICES 61-00-15Page 6-19

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HARTZELL Propeller Owner's Manual115N

~~------------------------------~--------~/WARNING: CLEANING AGENTS (ACETONE, #700LACQUER THINNER, AND MEK), AREFLAMMABLE AND TOXIC TO THE SKIN, EYESAND RESPIRATORY TRACT. SKINAND EYE

I PROTECTION ARE REQUIRED. AVOIDPROLONGED CONTACT. USE IN WELLVENTILATED AREA.

CAUTION: ANY REFINISHING PROCEDURE CAN ALTERPROPELLER BALANCE. PROPELLERS THATARE OUT OF BALANCE MAY EXPERIENCEEXCESSIVE VIBRATIONS WHILE INOPERATION.

I

I

(1) Using acetone, #700 lacquer thinner, or MEK, wipe thesurface of the blade to remove any contaminants.

(2) Feather the existing coatings away from the eroded orrepai red area with 120 to 180 grit sandpaper.NOTE: Paint erosion is typically very similar on a[1blades

in a propeller assembly. If one blade has moreextensive paint erosion, e.g., in the tip area, allthe blades should be sanded in the tip area toreplicate the repair of the most severely damagedblade tip. This practice is essential in maintainingbalance after refinishing.

MAINTENANCE PRACTICES 61-00-15Page 6-20

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Propeller Owner's Manual115NHARTZELL

(3) Use acetone, #700 lacquer thinner, or MEK to wipe thesurface of the blade. Allow the solvent to evaporate.

(4) Before refinishing the blades, apply a corrosion preventivecoating to the bare aluminum surface. Oakite 31,Chromicote L-25, or Alodine 1201 are approved chemicalconversion coatings. Apply these coatings in accordancewith the directions provided by the product manufacturer.

I (5) Apply masking material for the deice boot and tip stripes,as needed.

WARNING: FINISH COATINGS ARE FLAMMABLE ANDTOXIC TO THE SKIN, EYES ANDRESPIRATORYTRACT. SKINAND EYE

.I PROTECTION ARE REQUIRED. AVOIDPROLONGED CONTACT. USE INWELLVENTILATED AREA.

CAUTION: APPLY FINISH COATING ONLY TO THEDEGREE REQUIRED TO UNIFORMLY COVERTHE REPAIR/EROSION. AVOID EXCESSIVEPAINT BUILD-UP ALONG THE TRAILING EDGETO AVOID CHANGING BLADE PROFILE.

(6) Apply sufficient finish coating to achieve 2 to 4 milsthickness when dry. Re-coat before 30 minutes, or after 48hours. If the paint is allowed to dry longer than four (4)hours, it must be lightly sanded before another coat isapplied.

(7) Remove the masking from the tip stripes and re-mask toallow for the tip stripe refinishing, if required.

(8) Apply sufficient tip stripe coating to achieve 2 to 4 milsthickness when dry. Re-coat before 30 minutes, or after 48hours. If the paint is allowed to dry longer than four (4)hours, it must be lightly sanded before another coat isapplied.

(9) Remove the masking immediately from the de-ice bootand tip stripes, if required. .

(10) Optionally, perform dynamic balancing in accordance withthe procedures and limitations specified in the DynanicBalance section of this chapter.

IMAINTENANCE PRACTICES 61-00-15

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