86-10-12 WYTWORNIA SPRZETU KOMUNIKACYJNEGO "PZL-RZESZOW": Amendment 39- 5852. Applies to Wytwornia Sprzetu Komunikacyjnego "PZL-RZESZOW" PZL-3S piston engines.
NOTE: This AD does not apply to those PZL-3S piston engine models which are designated as the PZL- 3S 2nd Series.
Compliance is required as indicated, unless already accomplished.
To prevent separation of the propeller from the aircraft, accomplish the following:
(a) For engines with 275 hours or more since new, since overhaul, or since compliance with AD 83-21- 01, Amendment 39-4743 (48 FR 48222), on the effective date of this AD, perform the following within 25 hours after the effective date of this AD:
(1) Disassemble and visually inspect for distress of the rear crankshaft, rear counterweight, and rear counterweight pins.
(2) If any distress is found in the rear crankshaft, rear counterweight, or rear counterweight pins, replace distressed parts with new parts and replace the propeller attachment bolts and dowel pins with new parts.
(b) For engines with less than 275 hours since new, since overhaul, or since compliance with AD 83-21- 01 on the effective date of this AD, perform a(1) and a(2) above prior to reaching 300 hours since new, since overhaul, or since compliance with AD 83-21-01.
(c) Thereafter, perform a(1) and a(2) above at intervals not to exceed 300 hours since last accomplishment.
NOTE: Distress which has been observed during previous engine inspections includes wear, galling, pitting, scoring, and discoloration (blue color) of the counterweight pins.
(d) Aircraft may be ferried in accordance with the provisions of FAR 21.197 and 21.199 to a base where the AD can be accomplished.
(e) Upon request, an equivalent means of compliance with the requirements of this AD may be approved by the Manager, Engine Certification Office, Aircraft Certification Division, Federal Aviation Administration, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803.
(f) Upon submission of substantiating data by an owner or operator through an FAA maintenance inspector, the Manager, Engine Certification Office, New England Region, may adjust the compliance time specified in this AD.
This amendment becomes effective on March 2, 1988, as to all persons except those persons to whom it was made immediately effective by individual priority letter AD 86-10-12, issued May 21, 1986, which contained this amendment.