Czech Aircraft CRUISER AIRCRAFT PS-28 Cruiser 2021, Руководство по обслуживанию

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CR-MM-1-0-00
PS-28 Cruiser
PS-28N Cruiser
CHAPTER 10 – POWERPLANT
Date of issue: 2020-11-19 Revision No.: 24
10 - 41
Small repairs of blades which can be performed by an aircraft engineer
(AML ICAO, AML Part 66, etc.). See the Woodcomp Operator’s manual UM-07 before repair.
Repair of blades.
It is allowed to repair the failures like small scratches and notches appearing on the propeller
blade in area ranging from radius R=250 mm towards the blade tip, not more than 5 pieces in
one blade. Failures in the root blade area are allowed to be repaired by the manufacturer or
authorized service organization only.
Maximum acceptable depth of damaged leading or trailing propeller edge is 2 mm, while the
distance between the repaired spots may be not less than 80 mm. The spots length shall be
not more than 30 mm.
Maximum acceptable depth of damaged sucking or pressure blade side is 0,7 mm, while the
distance between the repaired spots may be not less than 100 mm and the spots may be not
larger than 1 cm
2
.
Instructions for repair of blades:
1. Clean and dry the damaged area carefully.
2. Grind the damaged place with help of a soft rasp or sand paper.
3. Seal the repaired area with cement on the epoxy basis.
4. Grind the surface after the cement is cured.
5. Re-paint the affected surface with polyurethan email.
Repair of hub and metal propeller parts.
Repairs of hub and metal propeller parts are strictly prohibited!!!
Repair of spinner and spinner plate.
Only repairs relating to small surface grooves on the outside spinner part or spinner plate with
max. depth of 0,5 mm are allowed.
Repairs of damaged or corrosion affected rivet nuts on the spinner plate are not allowed.
Instructions for repair of spinner or spinner plate:
1. Clean and dry the damaged area carefully.
2. Grind the damaged place with help of a soft rasp or sand paper.
3. Re-paint locally the groove with polyurethan email
Replacement of self-adhesive polyurethan tape.
Instructions for replacement:
1. Tear down the original tape carefully (a moderate pre-heating of the tape with help of
hair dryer is recommended)
2. Use technical petrol and clean and degrease the blade leading edge. It is very important
to remove all the rests of adhesive from the old tape.
3. Strip off the protective foil from the new tape carefully, so that you do not touch or
contaminate the gluing side of the tape.
4. Touch the tape to the prepared blade surface.
5. Squeeze out air bubbles with help of a plastic spattle or perforate the tape with a pin and
apply a roller or fingers to push the air away. Do not use a blade or knife to perforate the
tape!!
6.
In terms of operation the propeller is ready for use not sooner than after 24 hours since
the tape was touched to the surface and the adhesive has became hardened.